Updated on 2024/07/28

Information

 

写真a

 
NAGASHIMA YOSHIHIKO
 
Organization
Research Institute for Applied Mechanics Advanced Fusion Research Center Associate Professor
Research Center for Plasma Turbulence (Joint Appointment)
Interdisciplinary Graduate School of Engineering Sciences Department of Interdisciplinary Engineering Sciences(Joint Appointment)
Title
Associate Professor
Contact information
メールアドレス
Profile
Our research group explores experimental study on fluctuations and waves in plasmas. Plasma is the universal state in nature and laboratory, and has complex self-regulated medium. There are various kinds of fluctuations and waves in plasmas, and they play significant roles in structural formation of plasma media. Turbulence plasmas, excited from fluctuations, contribute loss of particle, energy, and momentum of plasmas. In addition, energy partition among waves and between wave and particle via linear and non-linear interactions. Therefore, study on fluctuations and waves in plasmas can develop understanding of structural formation of plasmas in nature, and innovation of fusion plasmas. Research themes in our laboratory are as following, 1. learning skills of experiment, 2. measuring fluctuations and waves, 3. applying data analysis techniques to observed data, 4. extracting deep physics of fluctuations, waves and turbulence. In addition, we also explore 5. controlling actively plasmas by radio-frequency heating and current drive, and observing response of RF to fluctuation data. Our experimental devices are PLATO tokamak, PANTA linear device, and QUEST spherical tokamak for plasma turbulence study in Research Institute for Applied Mechanics, Kyushu University. Our group has research collaborations with the University of Tokyo.
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Degree

  • Doctor of Science

Research History

  • 東京大学(助教)

Research Interests・Research Keywords

  • Research theme:Experimental study on plasma wave, fluctuation, and turbulence

    Keyword:plasma turbulence, zonal flow, bispectrum, rediofrequency wave heating

    Research period: 1998.4 - 2022.3

Awards

  • 科学技術分野の文部科学大臣表彰 若手科学賞

    2012.4   文部科学省   プラズマ乱流非線形解析による帯状流駆動機構実測の研究

  • 吉川允二核融合エネルギー奨励賞

    2011.12   核融合エネルギーフォーラム事務局(日本原子力研究開発機構 那珂核融合研究所内)   乱流による大域的な輸送現象とプラズマ流の形成過程との因果関係に関する研究

  • 日本物理学会領域2 第3回若手奨励賞

    2009.3   日本物理学会領域2  

  • 第11回 プラズマ・核融合学会 学術奨励賞(飯吉厚夫特別賞)

    2006.11   プラズマ・核融合学会  

Papers

  • Sanae-Inoue Itoh 1952–2019: a memorial note for a pioneer researcher of plasma bifurcation Reviewed International journal

    7 ( 1 )   21 - 48   2023.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1007/s41614-023-00123-6

  • A Proposal to Evaluate Electron Temperature and Electron Density Fluctuations Using Dual Wavelength Emission Intensity Tomography in a Linear Plasma Reviewed International journal

    Nagashima Y., Fujisawa A., Yamasaki K., Inagaki S., Moon C., Kin F., Kawachi Y., Arakawa H., Yamada T., Kobayashi T., Kasuya N., Kosuga Y., Sasaki M., Ido T.

    Journal of the Physical Society of Japan   92 ( 3 )   033501-1 - 033501-4   2023.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.7566/JPSJ.92.033501

    Repository Public URL: https://hdl.handle.net/2324/7173561

  • Comparison between Tomography and Langmuir Probe Data in PANTA Reviewed International journal

    NAGASHIMA Yoshihiko, FUJISAWA Akihide, YAMASAKI Kotaro, INAGAKI Shigeru, MOON Chanho, KIN Fumiyoshi, KAWACHI Yuichi, ARAKAWA Hiroyuki, YAMADA Takuma, KOBAYASHI Tatsuya, KASUYA Naohiro, KOSUGA Yusuke, SASAKI Makoto, and IDO Takeshi

    Journal of the Physical Society of Japan   89 ( 9 )   093501-1 - 093501-4   2020.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.7566/JPSJ.89.093501

  • Experimental research plan of nonlinearity of tokamak edge turbulence in plasma turbulence observatory Reviewed International journal

    Yoshihiko Nagashima, Akihide Fujisawa

    AIP Conference Proceedings   1993   020006   2018.8

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: https://doi.org/10.1063/1.5048716

    Other Link: https://aip.scitation.org/doi/abs/10.1063/1.5048716

  • Change in Edge Fluctuations Synchronized with Heat Pulse in the JFT-2M Tokamak Reviewed International journal

    Nagashima Yoshihiko, Kimitaka Itoh, Sanae-I. Itoh, Fujisawa Akihide

    Journal of the Physical Society of Japan   85 ( 6 )   063501-1 - 063501-3   2016.5

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    DOI: http://dx.doi.org/10.7566/JPSJ.85.063501

  • Observation of Parallel Force Balance for Drift Wave Fluctuation by a Fast Voltage Sweeping Method in a Linear Plasma Reviewed International journal

    Yoshihiko Nagashima, Shigeru Inagaki, Akihide Fujisawa, Hiroyuki Arakawa, Takuma Yamada, Yudai Miwa, Tatsuya Kobayashi, Sanae-I Itoh, Kimitaka Itoh

    Journal of the Physical Society of Japan   84.0 ( 6.0 )   2015.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.7566/JPSJ.84.063501

  • Non-Gaussian properties of global momentum and particle fluxes in a cylindrical laboratory plasma Reviewed International journal

    Nagashima, Yoshihiko; Itoh, Sanae-I.; Inagaki, Shigeru; Arakawa, Hiroyuki; Kasuya, Naohiro; Fujisawa, Akihide; Kamataki, Kunihiro; Yamada, Takuma; Shinohara, Shunjiro; Oldenbuerger, Stella; Yagi, Masatoshi; Takase, Yuichi; Diamond, Patrick H.; Itoh, Kimitaka

    PHYSICS OF PLASMAS   18.0 ( 7.0 )   2011.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.3601767

  • Evaluation of Edge Electron Temperature Fluctuation by the Use of Fast Voltage Scanning Method on TST-2 Reviewed International journal

    Yoshihiko NAGASHIMA, Akira EJIRI, Yuichi TAKASE, Masateru SONEHARA, Hidetoshi KAKUDA, Takuya OOSAKO, Junichi HIRATSUKA, Osamu WATANABE, Takashi YAMAGUCHI, Hiroaki KOBAYASHI, Takuma WAKATSUKI, Takuya SAKAMOTO, Kentaro HANASHIMA, Takanori AMBO, Ryota SHINO and Shigeru INAGAKI

    Plasma and Fusion Research   6.0 ( RA )   2011.7

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  • Development of radially movable multichannel Reynolds stress probe system for a cylindrical laboratory plasma Reviewed International journal

    Nagashima, Yoshihiko; Inagaki, Shigeru; Kamakaki, Kunihiro; Arakawa, Hiroyuki; Yamada, Takuma; Shinohara, Shunjiro; Kawai, Yoshinobu; Yagi, Masatoshi; Fujisawa, Akihide; Itoh, Sanae-I; Itoh, Kimitaka; Takase, Yuichi

    REVIEW OF SCIENTIFIC INSTRUMENTS   82.0 ( 3.0 )   2011.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.3557384

  • Fluctuation measurement in the edge plasma on TST-2 Reviewed International journal

    Yoshihiko NAGASHIMA, Jun'ichi OZAKI, Masateru SONEHARA, Yuichi TAKASE, Akira EJIRI, Kotaro YAMADA, Hidetoshi KAKUDA, Shigeru INAGAKI, Takuya OOSAKO, Byung Il AN, Hiroyuki HAYASHI, Kentaro HANASHIMA, Junichi HIRATSUKA, Hiroaki KOBAYASHI, Hiroki KURASHINA, Hazuki MATSUZAWA, Takuya SAKAMOTO, Takashi YAMAGUCHI, Osamu WATANABE and Takuma WAKATSUKI

    Plasma and Fusion Research   5.0 ( RA )   2010.12

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  • Observation of edge Reynolds stress increase preceding an L-H transition in Compact Helical System Reviewed International journal

    Yoshihiko NAGASHIMA, Kenichi NAGAOKA, Kimitaka ITOH, Akihide FUJISAWA, Mitsutaka ISOBE, Tsuyoshi AKIYAMA, Chihiro SUZUKI, Shin NISHIMURA, Yasuo YOSHIMURA, Keisuke MATSUOKA, Shoichi OKAMURA, Yuichi TAKASE, Akira EJIRI, Sanae -I. ITOH, Masatoshi YAGI, and CHS Group

    Plasma and Fusion Research   5.0 ( RC )   2010.10

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  • Observation of beat oscillation generation by coupled waves associated with parametric decay during radio frequency wave heating of a spherical tokamak plasma Reviewed International journal

    Yoshihiko Nagashima, Takuya Oosako, Yuichi Takase, Akira Ejiri, Osamu Watanabe, Hiroaki Kobayashi, Yuuki Adachi, Hiroshi Tojo, Takashi Yamaguchi, Hiroki Kurashina, Kotaro Yamada, Byung Il An, Hiroshi Kasahara, Fujio Shimpo, Ryuhei Kumazawa, Hiroyuki Hayashi, Haduki Matsuzawa, Junichi Hiratsuka, Kentaro Hanashima, Hidetoshi Kakuda, Takuya Sakamoto, and Takuma Wakatsuki

    Physical Review Letters   104.0 ( 24.0 )   2010.6

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  • Calculation of Beam Trajectories of a Heavy Ion Beam Probe Diagnostic in the TST-2 Spherical Tokamak Reviewed International journal

    Nagashima Yoshihiko, A. Ejiri, Fujisawa Akihide, Y. Takase

    IEEJ Transactions on Fundamentals and Materials   129.0 ( 9.0 )   2009.9

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  • Reynolds Stress Measurements for Investigation of Nonlinear Processes of Turbulence in the Large Mirror Device and in the Large Mirror Device-Upgrade Reviewed International journal

    Yoshihiko NAGASHIMA, Sanae-I. ITOH, Kimitaka ITOH, Akihide FUJISAWA, Shigeru INAGAKI, Yoshinobu KAWAI, Shunjiro SHINOHARA, Masayuki FUKAO, Takuma YAMADA, Kenichiro TERASAKA, Takashi MARUTA, Kunihiro KAMATAK, Hiroyuki ARAKAWA, Masatoshi YAGI, Naohiro KASUYA, George R. TYNAN, Patrick H. DIAMOND, and Yuichi Takase

    JOURNAL OF NUCLEAR MATERIALS   8.0   2009.8

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  • Boundary of the geodesic acoustic eigenmode in the vicinity of the magnetic separatrix Reviewed International journal

    Nagashima, Y.; Itoh, K.; Fujisawa, A.; Shinohara, K.; Itoh, S-I; Ido, T.; Yagi, M.; Hoshino, K.; Ejiri, A.; Takase, Y.; Uehara, K.; Miura, Y.

    PLASMA PHYSICS AND CONTROLLED FUSION   51.0 ( 6.0 )   2009.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0741-3335/51/6/065019

  • Observation of the parametric-modulational instability between the drift-wave fluctuation and azimuthally symmetric sheared radial electric field oscillation in a cylindrical laboratory plasma Reviewed International journal

    Nagashima, Yoshihiko; Itoh, Sanae-I.; Shinohara, Shunjiro; Fukao, Masayuki; Fujisawa, Akihide; Terasaka, Kenichiro; Kawai, Yoshinobu; Tynan, George R.; Diamond, Patrick H.; Yagi, Masatoshi; Inagaki, Shigeru; Yamada, Takuma; Itoh, Kimitaka

    PHYSICS OF PLASMAS   16.0 ( 2.0 )   2009.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.3078075

  • Coexistence of Zonal Flows and Drift-Waves in a Cylindrical Magnetized Plasma Reviewed International journal

    Nagashima, Yoshihiko; Itoh, Sanae-I; Shinohara, Shunjiro; Fukao, Masayuki; Fujisawa, Akihide; Terasaka, Kenichiro; Kawai, Yoshinobu; Kasuya, Naohiro; Tynan, George R.; Diamond, Patrick H.; Yagi, Masatoshi; Inagaki, Shigeru; Yamada, Takuma; Itoh, Kimitaka

    JOURNAL OF NUCLEAR MATERIALS   77.0 ( 11.0 )   2008.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1143/JPSJ.77.114501

  • Nonlinear energy transfer of drift-wave fluctuation in a cylindrical laboratory plasma Reviewed International journal

    Yoshihiko NAGASHIMA, Sanae -I. ITOH, Shunjiro SHINOHARA, Masayuki FUKAO, Akihide FUJISAWA, Kenichiro TERASAKA, Yoshinobu KAWAI, Naohiro KASUYA, Masatoshi YAGI, Shigeru INAGAKI, Takuma YAMADA and Kimitaka ITOH

    Plasma and Fusion Research   3.0 ( RC )   2008.10

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  • In search of zonal flows by using direct density fluctuation measurements Reviewed International journal

    Nagashima, Y.; Itoh, K.; Itoh, S-I; Fujisawa, A.; Yagi, M.; Hoshino, K.; Shinohara, K.; Ejiri, A.; Takase, Y.; Ido, T.; Uehara, K.; Miura, Y.

    PLASMA PHYSICS AND CONTROLLED FUSION   49.0 ( 10.0 )   2007.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0741-3335/49/10/002

  • Experimental study of nonlinear processes in edge turbulence of toroidal plasmas Reviewed International journal

    Yoshihiko NAGASHIMA, Katsumichi HOSHINO, Kenichi NAGAOKA, Kouji SHINOHARA, Akihide FUJISAWA, Kazuya UEHARA, Yoshinori KUSAMA, Katsumi IDA, Yasuo YOSHIMURA, Shoichi OKAMURA, Keisuke MATSUOKA, Akira EJIRI, Yuichi TAKASE, Kimitaka ITOH, Masatoshi YAGI, Sanae-I. ITOH, JFT-2M group and CHS group

    Plasma and Fusion Research   1.0 ( RA )   2006.9

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  • Observation of coherent bicoherence and biphase in potential fluctuations around geodesic acoustic mode frequency on JFT-2M Reviewed International journal

    Nagashima, Y; Itoh, K; Itoh, SI; Hoshino, K; Fujisawa, A; Ejiri, A; Takase, Y; Yagi, M; Shinohara, K; Uehara, K; Kusama, Y

    PLASMA PHYSICS AND CONTROLLED FUSION   48.0 ( 0.0 )   2006.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0741-3335/48/5A/S38

  • Convergence study of bispectral analysis in experiments of high temperature plasmas Reviewed International journal

    Nagashima, Y; Itoh, SI; Yagi, M; Itoh, K; Fujisawa, A; Hoshino, K; Shinohara, K; Uehara, K; Kusama, Y; Ejiri, A; Takase, Y

    REVIEW OF SCIENTIFIC INSTRUMENTS   77.0 ( 4.0 )   2006.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.2194016

  • Bispectral analysis applied to coherent floating potential fluctuations obtained in the edge plasmas on JFT-2M Reviewed International journal

    Nagashima, Y; Itoh, K; Itoh, SI; Fujisawa, A; Hoshino, K; Takase, Y; Yagi, M; Ejiri, A; Ida, K; Shinohara, K; Uehara, K; Kusama, Y

    PLASMA PHYSICS AND CONTROLLED FUSION   48.0 ( 4.0 )   2006.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0741-3335/48/4/S01

  • Observation of Nonlinear Coupling between Small-Poloidal Wave-Number Potential Fluctuations and Turbulent Potential Fluctuations in Ohmically Heated Plasmas in the JFT-2M Tokamak Reviewed International journal

    Y. Nagashima, K. Hoshino, A. Ejiri, K. Shinohara, Y. Takase, K. Tsuzuki, K. Uehara, H. Kawashima, H. Ogawa, T. Ido, Y. Kusama, and Y. Miura

    Physical Review Letters   95.0   2005.8

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  • Coherent edge fluctuation measurements in H-mode discharges on JFT-2M Reviewed International journal

    Y Nagashima, K Shinohara, K Hoshino, A Ejiri, K Tsuzuki, T Ido, K Uehara, H Kawashima, K Kamiya, H Ogawa, T Yamada, S Shiraiwa, S Ohara, Y Takase, N Asakura, N Oyama, T Fujita, S Ide, H Takenaga, Y Kusama, Y Miura and JFT-2M group

    PLASMA PHYSICS AND CONTROLLED FUSION   46.0 ( 5A )   2004.5

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  • Hydrogen removal by electron cyclotron wall conditioning with neon gas and its impact of tokamak plasma start-up on the QUEST spherical tokamak Reviewed International journal

    Masakatsu Fukumoto, Qilin Yue, Kazuaki Hanada, Shinichiro Kojima, Tomohide Nakano, Naoaki Yoshida, Ryuya Ikezoe, Yoshihiko Nagashima, Takeshi Ido, Takumi Onchi, Hiroshi Idei, Hiroki Iguchi, Takumi Komiyama, Taiichi Shikama, Akira Ejiri, Suguru Masuzaki, Mizuki Sakamoto, Yoshio Ueda, Kengoh Kuroda, Kaori Kono, Shun Shimabukuro, Aki Higashijima

    Nuclear Fusion   64 ( 6 )   066022-1 - 066022-8   2024.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/1741-4326/ad3d6e

  • Mass dependency of high-wavenumber turbulence in a linear partially magnetized plasma Reviewed International journal

    Yuichi Kawachi, Makoto Sasaki, Takashi Nishizawa, Yusuke Kosuga, Kenichiro Terasaka, Shigeru Inagaki, Takuma Yamada, Naohiro Kasuya, Chanho Moon, Yoshihiko Nagashima, Akihide Fujisawa

    Physics of Plasmas   31   044502-1 - 044502-5   2024.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1063/5.0187997

  • A Method to Analyze Plasma Images Using Modified Fourier-Bessel Functions Reviewed International journal

    Yuki NISHIMURA, Akihide FUJISAWA, Yoshihiko NAGASHIMA, Chanho MOON, Takashi NISHIZAWA, Tatsuya KOBAYASHI, Akihiro SHIMIZU, Tokihiko TOKUZAWA, Takeshi IDO, Daiki NISHIMURA, Taiki KOBAYASHI

    Plasma and Fusion Research   18   1201014-1 - 1201014-3   2024.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1585/pfr.19.1201014

  • Velocity Field Estimation using Tomography in a Cylindrical Plasma Reviewed International journal

    Daiki NISHIMURA, Akihide FUJISAWA, Yoshihiko NAGASHIMA, Chanho MOON, Kotaro YAMASAKI, Takashi NISHIZAWA, Taiki KOBAYASHI, Tatsuya KOBAYASHI, Akihiro SHIMIZU, Tokihiko TOKUZAWA

    Plasma and Fusion Research   18   1201005-1 - 1201005-3   2024.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1585/pfr.19.1201005

  • Observation of Quasi-Periodic Two-Dimensional Velocity Fields in Plasma Using Tomographic Laser-Induced Fluorescence Spectroscopy Reviewed International journal

    Hiroyuki ARAKAWA, Makoto SASAKI, Shigeru INAGAKI, Kenichiro TERASAKA, Yuichi KAWACHI, Fumiyoshi KIN, Takuma YAMADA, Yoshihiko NAGASHIMA, Akihide FUJISAWA

    Plasma and Fusion Research   18   1201086-1 - 1201086-3   2023.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1585/pfr.18.1201086

  • Rotational movement analysis based on Fourier-rectangular function transform for cylindrical plasma Reviewed International journal

    D. Nishimura, A. Fujisawa, T.-K. Kobayashi, T. Kobayashi, K. Yamasaki, A. Shimizu, Y. Nagashima, T. Tokuzawa, C. Moon, T. Nishizawa, T. Ido

    J. Appl. Phys.   134   113302-1 - 113302-7   2023.9

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    DOI: https://doi.org/10.1063/5.0165318

  • Transition between continuous and discrete spectra of high-wavenumber turbulence in neutral gas pressure scan experiments on a linear magnetized plasma Reviewed International journal

    Yuichi Kawachi, Makoto Sasaki, Takashi Nishizawa, Yusuke Kosuga, Kenichiro Terasaka, Shigeru Inagaki, Takuma Yamada, Naohiro Kasuya, Chanho Moon, Yoshihiko Nagashima, Akihide Fujisawa

    Plasma Physics and Controlled Fusion   65 ( 11 )   115001-1 - 115001-9   2023.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/1361-6587/acfbf7

  • Identification of trapping finer-scale fluctuations in a solitary vortex in linear magnetized plasma Reviewed International journal

    Hiroyuki Arakawa, Makoto Sasaki, Shigeru Inagaki, Maxime Lesur, Yusuke Kosuga, Tatsuya Kobayashi, Fumiyoshi Kin, Takuma Yamada, Yoshihiko Nagashima, Akihide Fujisawa, Kimitaka Itoh

    Plasma Physics and Controlled Fusion   65 ( 11 )   115002-1 - 115002-10   2023.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/1361-6587/acfbb3

  • Sudden Change Events of Plasma Current during Electron-Cyclotron Current Start-Up on the QUEST Spherical Tokamak Reviewed International journal

    Ryuya IKEZOE, Kosuke TAKEDA, Kengoh KURODA, Takumi ONCHI, Takahiro NAGATA, Izumi SEKIYA, Hiroshi IDEI, Fadilla ZENNIFA, Yifan ZHANG, Seiya SAKAI, Rikuya MIYATA, Takahiro YAMAGUCHI, Makoto HASEGAWA, Yoshihiko NAGASHIMA, Takeshi IDO and Kazuaki HANADA

    Plasma and Fusion Research   18   2402066-1 - 2402066-5   2023.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1585/pfr.18.2402066

  • Spectroscopic measurement of increases in hydrogen molecular rotational temperature with plasma-facing surface temperature and due to collisional-radiative processes in tokamaks Reviewed International journal

    N. Yoneda, T. Shikama, F. Scotti, K. Hanada, H. Iguchi, H. Idei, T. Onchi, A. Ejiri, T. Ido, K. Kono, Y. Peng, Y. Osawa, G. Yatomi, A. Kidani, M. Kudo, R. Hiraka, K. Takeda, R.E. Bell, A. Maan, D.P. Boyle, R. Majeski, V.A. Soukhanovskii, M. Groth, A.G. McLean, R.S. Wilcox, C. Lasnier, K. Nakamura, Y. Nagashima, R. Ikezoe, M. Hasegawa, K. Kuroda, A. Higashijima, T. Nagata, S. Shimabukuro, I. Niiya, I. Sekiya and M. Hasuo

    Nuclear Fusion   63 ( 9 )   096004-1 - 096004-16   2023.7

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    DOI: 10.1088/1741-4326/acd4d1

  • Design Study of a Line Integrated Thomson Scattering System for TST-2 Spherical Tokamak Device Reviewed International journal

    Akira EJIRI, Yu-Ting LIN, Seowon JANG, Yi PENG, Kouji SHINOHARA, Takeshi IDO, Kaori KONO and Yoshihiko NAGASHIMA

    Plasma and Fusion Research   18 ( 3 )   2402025-1 - 2402025-8   2023.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1585/pfr.18.2402025

  • Development of Thomson Scattering Measurement System for Long Duration Discharges on the QUEST Spherical Tokamak Reviewed International journal

    Kaori KONO, Takeshi IDO, Akira EJIRI, Kazuaki HANADA, Qilin YUE, Makoto HASEGAWA, Yi PENG, Seiya SAKAI, Ryuya IKEZOE, Hiroshi IDEI, Syoji KAWASAKI, Kengoh KURODA, Takumi ONCHI, Yoshihiko NAGASHIMA and Seowon JANG

    Plasma and Fusion Research   18   1405012-1 - 1405012-4   2023.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1585/pfr.18.1405012

  • Conceptual design of a heavy ion beam probe for the QUEST spherical tokamak Reviewed International journal

    Ido T., Hasegawa M., Ikezoe R., Onchi T., Hanada K., Idei H., Kuroda K., Nagashima Y.

    Review of Scientific Instruments   93 ( 11 )   113516-1 - 113516-5   2022.11

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    DOI: https://doi.org/10.1063/5.0101770

  • Formation Process of a Solitary Vortex in a Zonal Flow Drift-Wave Dynamics Reviewed International journal

    Arakawa H., Sasaki M., Inagaki S., Lesur M., Kosuga Y., Kobayashi T., Kin F., Yamada T., Nagashima Y., Fujisawa A., Itoh K.

    Plasma and Fusion Research   17   1301106-1 - 1301106-4   2022.11

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    DOI: https://doi.org/10.1585/pfr.17.1301106

  • Effects of sawtooth heat pulses on edge flows and turbulence in a tokamak plasma Reviewed International journal

    Plasma Science and Technology   25   015101-1 - 015101-8   2022.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/2058-6272/ac7c60

  • The first observation of 4D tomography measurement of plasma structures and fluctuations Reviewed International journal

    Chanho Moon, Kotaro Yamasaki, Yoshihiko Nagashima, Shigeru Inagaki, Takeshi Ido, Takuma Yamada, Naohiro Kasuya, Yusuke Kosuga, Makoto Sasaki, Yuichi Kawachi, Daiki Nishimura, Taiki Kobayashi and Akihide Fujisawa

    Scientific Reports   11   3720-1 - 3720-8   2021.12

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    Language:English   Publishing type:Research paper (scientific journal)  

  • Dynamic interaction between fluctuations with different origins in a linear magnetized plasma Reviewed International journal

    Kawachi Y.; Inagaki S.; Sasaki M.; Kosuga Y.; Yamasaki K.; Kobayashi T.; Kin F.; Yamada T.; Arakawa H.; Nagashima Y.; Moon C.; Kasuya N.

    Physics of Plasmas   28   112302-1 - 112302-6   2021.11

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    DOI: https://doi.org/10.1063/5.0065887

  • Observation of second harmonic electron cyclotron resonance heating and current-drive transition during non-inductive plasma start-up experiment in QUEST Reviewed International journal

    Kojima S.; Hanada, Kazuaki; Idei, Hiroshi; Onchi, Takumi; Ikezoe, Ryuya; Nagashima, Yoshihiko; Hasegawa, Makoto; Kuroda, Kengoh; Nakamura, Kazuo; Higashijima, Aki; Nagata, Takahiro; Kawasaki, Shoji

    Plasma Physics and Controlled Fusion   63   105002-1 - 105002-9   2021.10

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  • Transport Simulation of PLATO Tokamak Plasma Using Integrated Code TASK Reviewed International journal

    Shota MOCHINAGA, Naohiro KASUYA, Atsushi FUKUYAMA, Yoshihiko NAGASHIMA and Akihide FUJISAWA

    Plasma and Fusion Research   16   1403093-1 - 1403093-6   2021.8

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    DOI: 10.1585/pfr.16.1403093

  • Overview of recent progress on steady state operation of all-metal plasma facing wall device QUEST Reviewed International journal

    K.Hanada, N.Yoshida, M.Hasegawa, M.Oya, Y.Oya, I.Takagi, A.Hatayama, T.Shikama, H.Idei, Y.Nagashima, R.Ikezoe, T.Onchi, K.Kuroda, S.Kawasaki, A.Higashijima, T.Nagata, S.Shimabukuro, K.Nakamura, S.Murakami, Y.Takase, X.Gao, H.Liu, J.Qiang

    Nuclear Materials and Energy   27   101013-1 - 101013-8   2021.6

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    DOI: https://doi.org/10.1016/j.nme.2021.101013

  • Effects of Electron Temperature Fluctuation on Turbulence Measurement by Langmuir Probe in a Magnetized Helicon Plasma Reviewed International journal

    Yuichi KAWACHI, Shigeru INAGAKI, Makoto SASAKI, Yusuke KOSUGA, Takuma YAMADA, Yoshihiko NAGASHIMA, Chanho MOON, Naohiro KASUYA and Akihide FUJISAWA

    Plasma and Fusion Research   16   1202081-1 - 1202081-3   2021.6

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    DOI: 10.1585/pfr.16.1202081

  • Proposal of Analysis Method for Pattern Recognition of Two-Dimensional Structure of Plasma Reviewed International journal

    Taiki KOBAYASHI, Akihide FUJISAWA, Yoshihiko NAGASHIMA, Chanho MOON, Daiki NISHIMURA, Kotaro YAMASAKI, Shigeru INAGAKI

    Plasma and Fusion Research   16   1201082-1 - 1201082-3   2021.6

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    DOI: 10.1585/pfr.16.1201082

  • Fourier-Rectangular Function Analysis of Spatiotemporal Structure of Bursting Phenomenon in a Cylindrical Plasma Reviewed International journal

    Daiki NISHIMURA, Akihide FUJISAWA, Yoshihiko NAGASHIMA, Chanho MOON, Kotaro YAMASAKI, Taiki KOBAYASHI, Shigeru INAGAKI

    Plasma and Fusion Research   16   1201075-1 - 1201075-3   2021.6

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    DOI: https://doi.org/10.1585/pfr.16.1201075

  • Conceptual design of heavy ion beam probes on the PLATO tokamak Reviewed International journal

    Ido T.; Fujisawa A.; Takemura K.; Kobayashi T.-K.; Nishimura D.; Kasuya N.; Fukuyama A.; Moon C.; Yamasaki K.; Inagaki S.; Nagashima Y.; Yamada T.

    Review of Scientific Instruments   92   053553-1 - 053553-5   2021.5

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    DOI: https://doi.org/10.1063/5.0041814

  • Modal polarization analysis using Fourier-rectangular function transform in a cylindrical plasma Reviewed International journal

    D. Nishimura, A. Fujisawa, Y. Nagashima, C. Moon, K. Yamasaki, T.-K. Kobayashi, S. Inagaki, T. Yamada, Y. Kawachi, N. Kasuya, Y. Kosuga, M. Sasaki

    Journal of Applied Physics   129   093301-1 - 093301-7   2021.3

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    DOI: https://doi.org/10.1063/5.0037352

  • Extension of Operation Region for Steady State Operation on QUEST by Integrated Control with Hot Walls Reviewed International journal

    Makoto HASEGAWA, Kazuaki HANADA, Naoaki YOSHIDA, Hiroshi IDEI, Takeshi IDO, Yoshihiko NAGASHIMA, Ryuya IKEZOE, Takumi ONCHI, Kengoh KURODA, Shoji KAWASAKI, Aki HIGASHIJIMA, Takahiro NAGATA, Shun SHIMABUKURO and Kazuo NAKAMURA

    Plasma and Fusion Research   16   2402034-1 - 2402034-8   2021.3

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    DOI: 10.1585/pfr.16.2402034

  • Investigation on Double-Pass Configurations for Thomson Scattering Measurements Reviewed International journal

    Yi PENG, Akira EJIRI, Yuichi TAKASE, Naoto TSUJII, Osamu WATANABE, Kotaro IWASAKI, Yongtae KO, James Hamilton Palmer RICE, Yuki OSAWA, Go YATOMI, Iwao YAMADA, Takeshi IDO, Yoshihiko NAGASHIMA and Kaori KONO

    Plasma and Fusion Research   16   1402027-1 - 1402027-9   2021.3

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    DOI: https://doi.org/10.1585/pfr.16.1402027

  • Toroidal flow measurements of impurity ions in QUEST ECH plasmas using multiple viewing chords emission spectroscopy Reviewed International journal

    N Yoneda, T Shikama, K Hanada, S Mori, Takumi Onchi, K Kuroda, M Hasuo, A Ejiri, K Matsuzaki, Y Osawa, Y Peng, Y Kawamata, S Sakamoto, H Idei, T Ido, K Nakamura, Y Nagashima, Ryuya Ikezoe, M Hasegawa, A Higashijima, T Nagata, S Shimabukuro

    Nuclear Materials and Energy   26 ( 3 )   100905-1 - 100905-7   2021.3

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    DOI: https://doi.org/10.1016/j.nme.2021.100905

  • Investigation of radial distribution of atomic hydrogen flux to the plasma facing components in steady state discharges in QUEST tokamak Reviewed International journal

    A Kuzmin, M Kobayashi, K Hanada, H Idei, T Onchi, S Mori, N Yoneda, T Shikama, M Hasuo, T Ido, Y Nagashima, R Ikezoe, M Hasegawa, K Kuroda, K Kono, S Matsuo, T Nagata, S Shimabukuro, A Higashijima, I Niiya, H Zushi

    Nuclear Materials and Energy   26 ( 3 )   100872-1 - 100872-4   2021.3

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    DOI: https://doi.org/10.1016/j.nme.2020.100872

  • Correlation-estimated conditional average method and its application on solitary oscillation in PANTA Reviewed International journal

    TK Kobayashi, Akihide Fujisawa, Yoshihiko Nagashima, Chanho Moon, Kotaro Yamasaki, Daiki Nishimura, Shigeru Inagaki, Takuma Yamada, N Kasuya, Yusuke Kosuga, Makoto Sasaki, Yuichi Kawachi

    Plasma Physics and Controlled Fusion   63 ( 3 )   032001-1 - 032001-6   2021.1

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    DOI: https://doi.org/10.1088/1361-6587/abd980

  • Spectroscopic Measurement of Hydrogen Atom Density in a Plasma Produced with 28 GHz ECH in QUEST Reviewed International journal

    Satoru Mori, Taiichi Shikama, Kazuaki Hanada, Nao Yoneda, Arseniy Kuzmin, Masahiro Hasuo, Hiroshi Idei, Takumi Onchi, Akira Ejiri, Yuki Osawa, Yi Peng, Kyohei Matsuzaki, Shinichiro Kado, Keiji Sawada, Takeshi Ido, Kazuo Nakamura, Ryuya Ikezoe, Yoshihiko Nagashima, Makoto Hasegawa, Kengo Kuroda, Aki Higashijima, Takahiro Nagata, Shun Shimabukuro

    Atoms   8 ( 3 )   44-1 - 44-8   2020.9

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    DOI: https://doi.org/10.1585/pfr.15.2402063

  • Parametric Decay Wave Observation in HFS X-Mode Injection in QUEST Reviewed International journal

    Shinichiro Kojima, Hatem Elserafy, Kazuaki Hanada, Hiroshi Idei, Ryuya Ikezoe, Yoshihiko Nagashima, Makoto Hasegawa, Takumi Onchi, Kengoh Kuroda, Kazuo Nakamura, Takahiro Murakami, Masaharu Fukuyama, Ryoya Kato, Ryota Yoneda, Masayuki Ono, Akira Ejiri, Yuichi Takase, Sadayoshi Murakami

    Plasma and Fusion Research   15   2402063-1 - 2402063-2   2020.8

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    DOI: https://doi.org/10.1585/pfr.15.2402063

  • Simulation of Co-Existence of Ballooning and Kink Instabilities in PLATO Tokamak Plasma Reviewed International journal

    Shuhei Tomimatsu, Naohiro Kasuya, Masahiko Sato, Atsushi Fukuyama, Masatoshi Yagi, Yoshihiko Nagashima, Akihide Fujisawa

    Plasma and Fusion Research   15   1403052-1 - 1403052-2   2020.7

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    DOI: https://doi.org/10.1585/pfr.15.1403052

  • Observation of spatiotemporal structures of temperature fluctuations by using of a statistical phase detection method in a linear magnetized plasma Reviewed International journal

    Yuichi Kawachi, Shigeru Inagaki, Fumiyoshi Kin, Kotaro Yamasaki, Yusuke Kosuga, Makoto Sasaki, Yoshihiko Nagashima, Takuma Yamada, Hiroyuki Arakawa, Naohiro Kasuya, Chanho Moon, Kazunobu Hasamada, Akihide Fujisawa

    Plasma Physics and Controlled Fusion   62 ( 5 )   055011 - 055011   2020.5

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  • Magnetic Field Dependence of Plasma Properties Observed with Tomography in PANTA Reviewed International journal

    Issei MARUI, Akihide FUJISAWA, Yoshihiko NAGASHIMA, Chanho MOON, Kotaro YAMASAKI, Sigeru INAGAKI, Takuma YAMADA

    Plasma and Fusion Research   15   1201018 - 1201018   2020.4

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  • Tomography system for two-dimensional observation of fluctuation in magnetized plasma Reviewed International journal

    K Yamasaki, A Fujisawa, Y Nagashima, C Moon, S Inagaki, T Yamada

    Review of Scientific Instruments   91 ( 3 )   033502 - 033502   2020.3

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  • Electron heating of over-dense plasma with dual-frequency electron cyclotron waves in fully non-inductive plasma ramp-up on the QUEST spherical tokamak Reviewed International journal

    H Idei, T Onchi, K Mishra, H Zushi, T Kariya, T Imai, O Watanabe, R Ikezoe, K Hanada, M Ono, A Ejiri, J Qian, K Nakamura, A Fujisawa, Y Nagashima, M Hasegawa, K Matsuoka, A Fukuyama, S Kubo, M Yoshikawa, M Sakamoto, S Kawasaki, A Higashijima, S Ide, Y Takase, S Murakami

    Nuclear Fusion   60 ( 12 )   016030 - 016030   2019.12

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  • Study of turbulence intermittency in linear magnetized plasma Reviewed International journal

    Boyu Zhang, Shigeru Inagaki, Kazunobu Hasamada, Kotaro Yamasaki, Fumiyoshi Kin, Yoshihiko Nagashima, Takuma Yamada, Akihide Fujisawa

    Plasma Physics and Controlled Fusion   61 ( 11 )   115610 - 115610   2019.11

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  • Ion temperature measurement by laser‐induced fluorescence spectroscopy in panta Reviewed International journal

    Hirotyuki Arakawa, Shigeru Inagaki, Yusuke Kosuga, Makoto Sasaki, Fumiyoshi Kin, Kazunobu Hasamada, Kotaro Yamasaki, Tatsuya Kobayashi, Takuma Yamada, Yoshihiko Nagashima, Akihide Fujisawa, Naohiro Kasuya, Kimitaka Itoh, Sanae‐I Itoh

    14 ( 10 )   1450 - 1454   2019.10

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  • Particle balance investigation with the combination of the hydrogen barrier model and rate equations of hydrogen state in long duration discharges on an all-metal plasma facing wall in QUEST Reviewed International journal

    K Hanada, N Yoshida, M Hasegawa, A Hatayama, K Okamoto, I Takagi, T Hirata, Y Oya, M Miyamoto, M Oya, T Shikama, A Kuzmin, ZX Wang, H Long, H Idei, Y Nagashima, K Nakamura, O Watanabe, T Onchi, H Watanabe, K Tokunaga, A Higashijima, S Kawasaki, T Nagata, S Shimabukuro, Y Takase, S Murakami, X Gao, H Liu, J Qian, R Raman, M Ono

    Nuclear Fusion   59 ( 7 )   076007   2019.7

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    DOI: https://doi.org/10.1088/1741-4326/ab1858

    Other Link: https://iopscience.iop.org/article/10.1088/1741-4326/ab1858/meta

  • Estimation of fuel particle balance in steady state operation with hydrogen barrier model Reviewed International journal

    K Hanada, N Yoshida, I Takagi, T Hirata, Akiyoshi Hatayama, K Okamoto, Y Oya, T Shikama, Z Wang, H Long, C Huang, M Oya, H Idei, Y Nagashima, T Onchi, M Hasegawa, K Nakamura, H Zushi, K Kuroda, S Kawasaki, A Higashijima, T Nagata, S Shimabukuro, Y Takase, S Murakami, X Gao, H Liu, J Qian, R Raman, M Ono

    Nuclear Materials and Energy   19   544 - 549   2019.5

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    DOI: https://doi.org/10.1016/j.nme.2019.03.015

    Other Link: https://www.sciencedirect.com/science/article/pii/S2352179118302242

  • Roles of solitary eddy and splash in drift wave–zonal flow system in a linear magnetized plasma Reviewed International journal

    26 ( 5 )   052305   2019.5

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    DOI: https://doi.org/10.1063/1.5094577

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  • Estimation of Particle Flux Driven by Coherent Mode Using of Statistical Conditional Averaging Reviewed International journal

    Yuichi KAWACHI, Sigeru INAGAKI, Kazunobu HASAMADA, Kotaro YAMASAKI, Fumiyoshi KIN, Yusuke KOSUGA, Makoto SASAKI, Yoshihiko NAGASHIMA, Naohiro KASUYA, Takuma YAMADA, Boyu ZHANG, Akihide FUJISAWA

    Plasma and Fusion Research   14   1402090   2019.5

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    DOI: 10.1585/pfr.14.1402090

    Other Link: http://www.jspf.or.jp/PFR/PFR_articles/pfr2019/pfr2019_14-1402090.html

  • High voltage electrical system of 8.56 GHz CW klystron for electron cyclotron heating on QUEST spherical tokamak Reviewed International journal

    Takumi Onchi, Hiroshi Idei, K Nakamura, T Nagata, S Kawasaki, R Ashida, M Fukuyama, M Hasegawa, Ryuya Ikezoe, A Higashijima, K Kuroda, Y Nagashima, K Hanada

    Fusion Engineering and Design   2019.5

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    DOI: https://doi.org/10.1016/j.fusengdes.2019.04.043

    Other Link: https://www.sciencedirect.com/science/article/pii/S0920379619305770

  • Improvement of Aperture Configuration to Reduce the Stray Light for Thomson Scattering Measurement Using a Peripheral Beam Profile Monitor Reviewed International journal

    Yuya KAWAMATA, Akira EJIRI, Kyohei MATSUZAKI, Yuichi TAKASE, Naoto TSUJII, Takumi ONCHI, Yoshihiko NAGASHIMA

    Plasma and Fusion Research   14   1402072   2019.4

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    DOI: 10.1585/pfr.14.1402072

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  • Improvement of Aperture Configuration to Reduce the Stray Light for Thomson Scattering Measurement Using a Peripheral Beam Profile Monitor Reviewed International journal

    Yuya KAWAMATA, Akira EJIRI, Kyohei MATSUZAKI, Yuichi TAKASE, Naoto TSUJII, Takumi ONCHI and Yoshihiko NAGASHIMA

    Plasma and Fusion Research   14   1402072-1 - 1402072-4   2019.4

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    DOI: https://doi.org/10.1585/pfr.14.1402072

  • Fourier-rectangular function analysis for cylindrical plasma images Reviewed International journal

    K Yamasaki, A Fujisawa, Y Nagashima, C Moon, S Inagaki, N Kasuya, ...

    Journal of Applied Physics   126 ( 7 )   043304 - 043304   2019.4

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  • Plasma equilibrium based on EC-driven current profile with toroidal rotation on QUEST Invited Reviewed International journal

    K Nakamura, MM Alam, YZ Jiang, O Mitarai, M Takechi, M Hasegawa, K Tokunaga, K Hanada, Hiroshi Idei, Y Nagashima, Takumi Onchi, K Kuroda, O Watanabe, A Higashijima, T Nagata, S Shimabukuro, S Kawasaki, A Fukuyama

    Fusion Engineering and Design   2019.4

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    DOI: https://doi.org/10.1016/j.fusengdes.2019.04.059

    Other Link: https://www.sciencedirect.com/science/article/pii/S0920379619305939

  • Observations of radially elongated particle flux induced by streamer in a linear magnetized plasma Reviewed International journal

    F Kin, A Fujisawa, K Itoh, Y Kosuga, M Sasaki, S Inagaki, Y Nagashima, T Yamada, N Kasuya, K Yamasaki, K Hasamada, BY Zhang, Y Kawachi, H Arakawa, T Kobayashi, S-I Itoh

    Physics of Plasmas   26 ( 4 )   042306   2019.4

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    DOI: https://doi.org/10.1063/1.5093218

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  • HFS Injection of X-Mode for EBW Conversion in QUEST Reviewed International journal

    Hatem Elserafy, Kazuaki Hanada, Kengoh Kuroda, Hiroshi Idei, Ryota Yoneda, Canbin Huang, Shinichiro Kojima, Makoto Hasegawa, Yoshihiko Nagashima, Takumi Onchi, Ryuya Ikezoe, Aki Higashijima, Takahiro Nagata, Shoji Kawasaki, Shun Shimabukuro, Nicola Bertelli, Masayuki Ono

    Plasma and Fusion Research   14   1205038   2019.3

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    DOI: 10.1585/pfr.14.1205038

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  • 28-GHz ECHCD system with beam focusing launcher on the QUEST spherical tokamak Reviewed International journal

    Hiroshi Idei, Takumi Onchi, @T Kariya, @TI Tsujimura, @S Kubo, @S Kobayashi, @M Sakaguchi, @T Imai, Makoto Hasegawa, K Nakamura, K Mishra, @M Fukuyama, M Yunoki, S Kojima, O Watanabe, K Kuroda, Kazuaki Hanada, Yoshihiko Nagashima, @A Ejiri, @N Matsumoto, M Ono, A Higashijima, T Nagata, S Shimabukoro, Y Takase, A Fukuyama, S Murakami

    Fusion Engineering and Design   2019.2

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    DOI: https://doi.org/10.1016/j.fusengdes.2019.02.027

    Other Link: https://www.sciencedirect.com/journal/fusion-engineering-and-design/articles-in-press

  • Symmetry-Breaking of Turbulence Structure and Position Identification in Toroidal Plasmas Reviewed International journal

    @Kimitaka Itoh, Sanae-I Itoh, Yoshihiko Nagashima, Takuma Yamada, Yusuke Kosuga, Akihide Fujisawa

    Plasma and Fusion Research   13   1102113   2018.10

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    DOI: https://doi.org/10.1585/pfr.13.1102113

    Other Link: http://www.jspf.or.jp/PFR/PFR_articles/pfr2018/pfr2018_13-3401105.html

  • Determination of Spatiotemporal Structure of Fluctuations by Statistical Averaging Method Reviewed International journal

    #Yuichi KAWACHI, Sigeru INAGAKI, Kentaro TOMITA, Kotaro YAMASAKI, #Fumiyoshi KIN, Yusuke KOSUGA, Makoto SASAKI, Yoshihiko NAGASHIMA, Naohiro KASUYA, #Kazunobu HASAMADA, #Boyu ZHANG, Akihide FUJISAWA

    Plasma and Fusion Research   13   3401105   2018.8

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    DOI: 10.1585/pfr.13.3401105

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  • Spectroscopic Measurements of Impurity Ion Toroidal and Poloidal Flow Velocities and Their Dependence on Vertical Magnetic Field in QUEST Toroidal ECR Plasmas Reviewed International journal

    @Nao YONEDA, @Taiichi SHIKAMA, Hideki ZUSHI, Kazuaki HANADA, @Akinobu FUJIKAWA, Takumi ONCHI, Kengoh KURODA, @Kuniaki NII, @Masahiro HASUO, Makoto HASEGAWA, Hiroshi IDEI, Kazuo NAKAMURA, Yoshihiko NAGASHIMA, Aki HIGASHIJIMA, @Takahiro NAGATA

    Plasma and Fusion Research   13   3402087   2018.7

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    DOI: 10.1585/pfr.13.3402087

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  • Current status and prospect of plasma control system for steady-state operation on QUEST Reviewed International journal

    Makoto Hasegawa, Kazuo Nakamura, Hideki Zushi, Kazuaki Hanada, Akihide Fujisawa, Kazutoshi Tokunaga, Hiroshi Idei, Yoshihiko Nagashima, Shoji Kawasaki, Hisatoshi Nakashima, Aki Higashijima

    Fusion Engineering and Design   112 ( 11 )   699 - 702   2018.6

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    DOI: https://doi.org/10.1016/j.fusengdes.2016.04.016

    Other Link: https://www.sciencedirect.com/science/article/pii/S0920379616303064?via%3Dihub

  • A proposal of Fourier-Bessel expansion with optimized ensembles of bases to analyse two dimensional image Reviewed International journal

    K Yamasaki, A Fujisawa, Y Nagashima

    Review of Scientific Instruments   88 ( 9 )   093507   2018.6

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    DOI: https://doi.org/10.1063/1.5000744

    Other Link: https://aip.scitation.org/doi/abs/10.1063/1.5000744

  • Multiple-Instabilities in Magnetized Plasmas with Density Gradient and Velocity Shears Reviewed International journal

    Makoto Sasaki, Naohiro Kasuya, Shinichiro Toda, Takuma Yamada, Yusuke Kosuga, Hiroyuki Arakawa, Tatsuya Kobayashi, Shigeru Inagaki, Akihide Fujisawa, Yoshihiko Nagashima, Kimitaka Itoh, Sanae-I Itoh

    Plasma and Fusion Research   12   1401042   2018.6

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    DOI: https://doi.org/10.1585/pfr.12.1401042

    Other Link: https://www.jstage.jst.go.jp/article/pfr/12/0/12_1401042/_article/-char/ja/

  • Extraction of nonlinear waveform in turbulent plasma Reviewed International journal

    F Kin, K Itoh, A Fujisawa, Y Kosuga, M Sasaki, T Yamada, S Inagaki, S-I Itoh, T Kobayashi, Y Nagashima, N Kasuya, H Arakawa, K Yamasaki, K Hasamada

    Physics of Plasmas   25 ( 6 )   062304   2018.6

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    DOI: https://doi.org/10.1063/1.5027124

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  • Effect of magnetic shear on edge turbulence in SOL-like open field line configuration in QUEST Reviewed International journal

    Santanu Banerjee, Hideki Zushi, Nobuhiro Nishino, Kazuaki Hanada, Hiroshi Idei, K Nakamura, Makoto Hasegawa, Akihide Fujisawa, Yoshihiko Nagashima, Kishore Mishra, Saya Tashima, Takumi Onchi, Arseniy Aleksandrovich Kuzmin, Keisuke Matsuoka

    Plasma Physics and Controlled Fusion   2018.6

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    DOI: https://doi.org/10.1088/1361-6587/aacb69

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  • Modification of plasma control system and hot-wall temperature control system for long-duration plasma sustainment in QUEST Reviewed International journal

    Makoto Hasegawa, Kazuo Nakamura, Kazuaki Hanada, Shoji Kawasaki, Arseniy Kuzmin, Hiroshi Idei, Kazutoshi Tokunaga, Yoshihiko Nagashima, Takumi Onchi, Kengoh Kuroda, Osamu Watanabe, Aki Higashijima, Takahiro Nagata

    Fusion Engineering and Design   129   202 - 206   2018.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.fusengdes.2018.02.069

    Other Link: https://www.sciencedirect.com/science/article/pii/S0920379618301704?via%3Dihub

  • Three-Dimensional Structure of the Streamer in Linear Plasmas Reviewed International journal

    Takuma Yamada,Shigeru Inagaki,Makoto Sasaki,Yoshihiko Nagashima,Fumiyoshi Kin,Hiroyuki Arakawa,Tatsuya Kobayashi,Kotaro Yamasak ,Naohiro Kasuya,Yusuke Kosuga,Akihide Fujisawa,Kimitaka Itoh,and Sanae-I.Itoh

    Journal of the Physical Society of Japan   87   034501-1 - 034501-4   2018.1

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    DOI: https://doi.org/10.7566/JPSJ.87.034501

    Other Link: https://journals.jps.jp/doi/10.7566/JPSJ.87.034501

  • Quantification of Turbulent Driving Forces for the Geodesic Acoustic Mode in the JFT-2M Tokamak Invited Reviewed International journal

    T.Kobayashi,M.Sasaki,T.Ido,K.Kamiya,Y.Miura,Y.Nagashima,K.Ida,S.Inagaki,A.Fujisawa,S.-I.Itoh,and K.Itoh

    Physical Review Letters   120 ( 4 )   045002-1 - 045002-4   2018.1

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    DOI: https://doi.org/10.1103/PhysRevLett.120.045002

    Other Link: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.120.045002

  • Position Identification of Measurement for the Study of Symmetry-Breaking of Turbulence Structure in Toroidal Plasmas Reviewed International journal

    Kimitaka Itoh,Sanae-I.Itoh,Yoshihiko Nagashima,Takuma Yamada,and Akihide Fujisawa

    Journal of the Physical Society of Japan Short Note   87   025002-1 - 025002-2   2017.12

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    DOI: https://doi.org/10.7566/JPSJ.87.025002

    Other Link: https://journals.jps.jp/doi/10.7566/JPSJ.87.025002

  • Fast Algorithm for Tomographic Reconstruction for Plasma Emission Reviewed International journal

    Kotaro YAMASAKI, Akihide FUJISAWA, Yoshihiko NAGASHIMA, Shigeru INAGAKI

    Plasma and Fusion Research   12   1201045   2017.11

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    DOI: https://doi.org/10.1585/pfr.12.1201045

    Other Link: https://www.jstage.jst.go.jp/article/pfr/12/0/12_1201045/_article/-char/ja/

  • Topological bifurcation of helical flows in magnetized plasmas with density gradient and parallel flow shear Reviewed International journal

    M Sasaki, N Kasuya, K Itoh, S Toda, T Yamada, Y Kosuga, Y Nagashima, T Kobayashi, H Arakawa, K Yamasaki, A Fujisawa, S Inagaki, S-I Itoh

    Physics of Plasmas   24 ( 11 )   112103   2017.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1063/1.5000343

    Other Link: https://aip.scitation.org/doi/abs/10.1063/1.5000343

  • Turbulent transport reduction induced by transition on radial electric field shear and curvature through amplitude and cross-phase in torus plasma Reviewed International journal

    T Kobayashi, K Itoh, T Ido, K Kamiya, S-I Itoh, Y Miura, Y Nagashima, A Fujisawa, S Inagaki, K Ida

    Scientific reports   7 ( 1 )   14971   2017.11

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    Other Link: https://www.nature.com/articles/s41598-017-14821-y

  • Fully non-inductive second harmonic electron cyclotron plasma ramp-up in the QUEST spherical tokamak Invited Reviewed International journal

    H. Idei,T. Kariya,T. Imai,K. Mishra,T. Onchi,O. Watanabe,H. Zushi,K. Hanada,J. Qian,A. Ejiri,M.M. Alam,K. Nakamura,A. Fujisawa,Y. Nagashima,M. Hasegawa,K. Matsuoka,A. Fukuyama,S. Kubo,T. Shimozuma,M. Yoshikawa,M. Sakamoto,S. Kawasaki,H. Nakashima,A. Higashijima,S. Ide,T. Maekawa,Y. Takase and K. Toi

    Nuclear Fusion   57   126045-1 - 126045-11   2017.10

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    DOI: https://doi.org/10.1088/1741-4326/aa7c20

    Other Link: http://iopscience.iop.org/article/10.1088/1741-4326/aa7c20/meta

  • Model validation for radial electric field excitation during L–H transition in JFT-2M tokamak Reviewed International journal

    57 ( 7 )   072005   2017.10

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    In this paper, we elaborate the electric field excitation mechanism during the L–H transition in the JFT-2M tokamak. Using time derivative of the Poisson's equation, models of the radial electric field excitation is examined. The sum of the loss-cone loss current and the neoclassical bulk viscosity current is found to behave as the experimentally evaluated radial current that excites the radial electric field. The turbulent Reynolds stress only plays a minor role. The wave convection current that produces a negative current at the edge can be important to explain the ambipolar condition in the L-mode

    DOI: https://doi.org/10.1088/1741-4326/aa5d03

    Other Link: http://iopscience.iop.org/article/10.1088/1741-4326/aa5d03/meta

  • Investigation of hydrogen recycling in long-duration discharges and its modification with a hot wall in the spherical tokamak QUEST Reviewed International journal

    K Hanada, N Yoshida, T Honda, Z Wang, A Kuzmin, I Takagi, T Hirata, Y Oya, M Miyamoto, H Zushi, M Hasegawa, K Nakamura, A Fujisawa, H Idei, Y Nagashima, O Watanabe, T Onchi, K Kuroda, H Long, H Watanabe, K Tokunaga, A Higashijima, S Kawasaki, T Nagata, Y Takase, A Fukuyama, O Mitarai

    Nuclear Fusion   57 ( 12 )   126061   2017.10

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    DOI: https://doi.org/10.1088/1741-4326/aa8121

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  • Measurement of thickness of film deposited on the plasma-facing wall in the QUEST tokamak by colorimetry Reviewed International journal

    Review of Scientific Instruments   88   093502-1 - 093502-8   2017.9

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    DOI: https://doi.org/10.1063/1.5000739

    Other Link: https://aip.scitation.org/doi/10.1063/1.5000739

  • Temporal-spatial structures of plasmas flows and turbulence around tearing mode islands in the edge tokamak plasmas Reviewed International journal

    KJ Zhao, Y Nagashima, FM Li, Yuejiang Shi, PH Diamond, JQ Dong, K Itoh, S-I Itoh, G Zhuang, H Liu, ZP Chen, J Cheng, L Nie, YH Ding, QM Hu, ZY Chen, B Rao, ZF Cheng, L Gao, XQ Zhang, ZJ Yang, NC Wang, L Wang, W Jin, W Yan, JQ Xu, YF Wu, LW Yan, A Fujisawa, S Inagaki, Y Kosuga, M Sasaki, J-TEXT Team

    Nuclear Fusion   57 ( 12 )   126006   2017.9

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    DOI: https://doi.org/10.1088/1741-4326/aa8341

    Other Link: http://iopscience.iop.org/article/10.1088/1741-4326/aa8341/meta

  • Nonlinear Coupling of Drift Waves and High Frequency Fluctuation on PANTA Reviewed International journal

    Kazunobu Hasamada, Yusuke Kosuga, Fumiyoshi Kin, Sigeru Inagaki, Yoshihiko Nagashima, Tatsuya Kobayashi, Makoto Sasaki, Naohiro Kasuya, Kotaro Yamasaki, Sanae-I Itoh, Kimitaka Itoh, Akihide Fujisawa

    Plasma and Fusion Research   12   1201034   2017.8

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    DOI: https://doi.org/10.1585/pfr.12.1201034

    Other Link: https://www.jstage.jst.go.jp/article/pfr/12/0/12_1201034/_article/-char/ja/

  • Hysteresis and fast timescales in transport relations of toroidal plasmas Reviewed International journal

    K Itoh, S-I Itoh, K Ida, S Inagaki, Y Kamada, K Kamiya, JQ Dong, C Hidalgo, T Evans, WH Ko, H Park, T Tokuzawa, S Kubo, T Kobayashi, Y Kosuga, M Sasaki, GS Yun, SD Song, N Kasuya, Y Nagashima, C Moon, M Yoshinuma, R Makino, T Tsujimura, H Tsuchiya, U Stroth

    Nuclear Fusion   57 ( 10 )   102021   2017.7

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    DOI: https://doi.org/10.1088/1741-4326/aa796a

    Other Link: http://iopscience.iop.org/article/10.1088/1741-4326/aa796a/meta

  • Mesoscale electric fluctuations interacting with zonal flows, magnetic fluctuations and turbulence Reviewed International journal

    KJ Zhao, Y Nagashima, PH Diamond, JQ Dong, K Itoh, S-I Itoh, LW Yan, J Cheng, A Fujisawa, S Inagaki, Y Kosuga, M Sasaki, ZH Huang, DL Yu, Q Li, XQ Ji, XM Song, Y Huang, Yi Liu, QW Yang, XT Ding, XR Duan

    Nuclear Fusion   57 ( 7 )   076036   2017.6

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    DOI: https://doi.org/10.1088/1741-4326/aa6f35

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  • Measurements of edge plasma parameters during internal reconnection events in the TST-2 spherical tokamak Reviewed International journal

    H Furui, A Ejiri, Y Nagashima, Y Takase, M Sonehara, N Tsujii, B Roidl, T Shinya, H Togashi, H Homma, K Nakamura, T Takeuchi, S Yajima, Y Yoshida, K Toida, W Takahashi, H Yamazaki

    Physics of Plasmas   24 ( 6 )   062504   2017.6

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    DOI: https://doi.org/10.1063/1.4985077

    Other Link: https://aip.scitation.org/doi/abs/10.1063/1.4985077

  • Phenomenological Classification of Turbulence States in Linear Magnetized Plasma PANTA Reviewed International journal

    Tatsuya Kobayashi, Sigeru Inagaki, Makoto Sasaki, Yusuke Kosuga, Hiroyuki Arakawa, Fumiyoshi Kin, Takuma Yamada, Yoshihiko Nagashima, Naohiro Kasuya, Akihide Fujisawa, Sanae-I Itoh, Kimitaka Itoh

    Plasma and Fusion Research   12   1401019   2017.5

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    DOI: https://doi.org/10.1585/pfr.12.1401019

    Other Link: https://www.jstage.jst.go.jp/article/pfr/12/0/12_1401019/_article/-char/ja/

  • Coexistence of Drift Waves and D'Angelo Modes at Different Position and Frequency in Linear Plasma Device Reviewed International journal

    Nathan Dupertuis, Shigeru Inagaki, Yoshihiko Nagashima, Yusuke Kosuga, Fumiyoshi Kin, Tatsuya Kobayashi, Naohiro Kasuya, Makoto Sasaki, Akihide Fujisawa, Minh Quang Tran, Sanae-I Itoh, Kimitaka Itoh

    Plasma and Fusion Research   12   1201008   2017.3

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    DOI: https://doi.org/10.1585/pfr.12.1201008

    Other Link: https://www.jstage.jst.go.jp/article/pfr/12/0/12_1201008/_article/-char/ja/

  • On the Application of Cross Bispectrum and Cross Bicoherence Reviewed International journal

    Sanae-I Itoh, Kimitaka Itoh, Yoshihiko Nagashima, Yusuke Kosuga

    Plasma and Fusion Research   12   1101003   2017.3

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    DOI: https://doi.org/10.1585/pfr.12.1101003

    Other Link: https://www.jstage.jst.go.jp/article/pfr/12/0/12_1101003/_article/-char/ja/

  • Power balance estimation in long duration discharges on QUEST Reviewed International journal

    K.Hanada, H.Zushi, H.Idei, K.Nakamura, M.Ishiguro, S.Tashima, E.I.Kalinnikova, Y.Nagashima, M.Hasegawa, A.Fujisawa, A.Higashijima, S.Kawasaki, H.Nakashima, O.Mitarai, A.Fukuyama, Y.Takase, X. Gao, H.Liu, J.Qian, M.Ono, R.Raman

    Plasma Science and Technology   18 ( 11 )   1069   2016.11

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    DOI: https://doi.org/10.1088/1009-0630/18/11/03

    Other Link: http://iopscience.iop.org/article/10.1088/1009-0630/18/11/03/meta

  • Current status and prospect of plasma control system for steady-state operation on QUEST Reviewed International journal

    Makoto Hasegawa, Kazuo Nakamura, Hideki Zushi, Kazuaki Hanada, Akihide Fujisawa, Kazutoshi Tokunaga, Hiroshi Idei, Yoshihiko Nagashima, Shoji Kawasaki, Hisatoshi Nakashima, Aki Higashijima

    Fusion Engineering and Design   112   699 - 702   2016.11

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    DOI: https://doi.org/10.1016/j.fusengdes.2016.04.016

    Other Link: https://www.sciencedirect.com/science/article/pii/S0920379616303064

  • Analysis of plasma equilibrium based on orbit-driven current density profile in steady-state plasma on QUEST Reviewed International journal

    K. Nakamura, M.M. Alam, Y.Z. Jiang, O. Mitarai, K. Kurihara, Y. Kawamata, M. Sueoka, M. Takechi, M. Hasegawa, K. Tokunaga, K. Araki, H. Zushi, K. Hanada, A. Fujisawa, H. Idei, Y. Nagashima, S. Kawasaki, H. Nakashima, A. Higashijima, T. Nagata, A. Fukuyama

    Fusion Engineering and Design   109-111(Part B)   1528 - 1533   2016.11

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    DOI: https://doi.org/10.1016/j.fusengdes.2015.11.035

    Other Link: https://www.sciencedirect.com/science/article/pii/S0920379615303604?via%3Dihub

  • Comparison of current density profiles based on particle orbit-driven current in steady-state plasma on QUEST Invited Reviewed International journal

    Md Mahbub Alam, Kazuo Nakamura, Fan Xia, Osamu Mitarai, Makoto Hasegawa, Kazutoshi Tokunaga, Kuniaki Araki, Hideki Zushi, Kazuaki Hanada, Akihide Fujisawa, Hiroshi Idei, Yoshihiko Nagashima, Shoji Kawasaki, Hisatoshi Nakashima, Aki Higashijima, Takahiro Nagata

    Fusion Engineering and Design   109-111(Part B),   1624 - 1630   2016.11

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    DOI: https://doi.org/10.1016/j.fusengdes.2015.11.007

    Other Link: https://www.sciencedirect.com/science/article/pii/S0920379615303343?via%3Dihub

  • Response of the far scrape-off layer plasma to strong gas puffing in the high poloidal beta configuration on the QUEST spherical tokamak Reviewed International journal

    Onchi, Takumi; Zushi, Hideki; Mishra, Kishore; Oyama, Yuya; Nagashima, Yoshihiko; Hanada, Kazuaki; Idei, Hiroshi; Hasegawa, Makoto; Kuzmin, Arseniy; Miura, Hiroki; Nakamura, K; Fujisawa, Akihide; Nagaoka, Kenichi

    Plasma Physics and Controlled Fusion   58   115004-1   2016.9

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    DOI: https://doi.org/10.1088/0741-3335/58/11/115004

    Other Link: http://iopscience.iop.org/article/10.1088/0741-3335/58/11/115004/meta

  • Hydrogen flux measurements with permeation probes in spherical tokamak QUEST Reviewed International journal

    Aleksandrovich Arseniy Kuzmin, zushi hideki, I Takagi, SK Sharma, Y Hirooka, M Kobayashi, Mizuki Sakamoto, K.Hanada, Takumi Onchi, Y Oyama, Naoaki Yoshida, Kazuo Nakamura, Fujisawa Akihide, H.Idei, Nagashima Yoshihiko, Makoto Hasegawa, MISHRA KISHORE KANTI

    Vacuum   2016.7

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    DOI: 10.1016/j.vacuum.2016.04.025

  • Observation of an edge coherent mode and poloidal flow in the electron cyclotron wave induced high βp plasma in QUEST Reviewed International journal

    23 ( 082507-1 )   082507-8   2016.6

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    Fluctuations are measured in the edge and scrape-off layer (SOL) of QUEST using fast visible imaging diagnostic. Electron cyclotron wave injection in the Ohmic plasma features excitation of low frequency coherent fluctuations near the separatrix and enhanced cross-field transport. Plasma shifts from initial high field side limiter bound (inboard limited, IL) towards inboard poloidal null (IPN) configuration with steepening of the density profile at the edge. This may have facilitated the increased edge and SOL fluctuation activities. Observation of the coherent mode, associated plasma flow, and particle out-flux, for the first time in the IPN plasma configuration in a spherical tokamak may provide further impetus to the edge and SOL turbulence studies in tokamaks.

    DOI: https://doi.org/10.1063/1.4960117

    Other Link: https://aip.scitation.org/doi/10.1063/1.4960117

  • Improvement of the Reynolds stress probe for end-plate biasing experiments in a cylindrical laboratory plasma Reviewed International journal

    Tomotsugu Kanzaki, Nagashima Yoshihiko, S. Inagaki, Fumiyoshi Kin, Yudai Miwa, M. Sasaki, Takuma Yamada, Fujisawa Akihide, Tatsuya Kobayashi, Naohiro Kasuya, Yusuke Kosuga, Sanae-I. Itoh, Kimitaka Itoh

    Plasma and Fusion Research Rapid Communication   2016.5

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  • A model of plasma current through a hole of Rogowski probe including sheath effects Reviewed International journal

    Hirokazu Furui, Akira Ejiri, Nagashima Yoshihiko, Y. Takase, M. Sonehara, N. Tsujii, T. Yamaguchi, T. Shinya, H. Togashi, H. Homma, Kazuo Nakamura, T. Takeuchi, S. Yajima, Y. Yoshida, W. Takahashi, H. Yamazaki

    Review of Scientific Instruments   87 ( 4 )   043503-1 - 043503-10   2016.4

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  • Current status and prospect of plasma control system for steady-state operation on QUEST Reviewed International journal

    Makoto Hasegawa, Kazuo Nakamura, zushi hideki, K.Hanada, Fujisawa Akihide, K. Tokunaga, H.Idei, Nagashima Yoshihiko, Shoji Kawasaki, Hisatoshi Nakashima, Aki Higashijima

    Fusion Engineering and Design   2016.4

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    DOI: 10.1016/j.fusengdes.2016.04.016

  • Adaptive-array Electron Cyclotron Emission diagnostics using data streaming in a Software Defined Radio system Reviewed International journal

    H.Idei, MISHRA KISHORE KANTI, MK Yamamoto, M Hamasaki, Fujisawa Akihide, Nagashima Yoshihiko, Y Hayashi, Takumi Onchi, K.Hanada, zushi hideki

    Journal of Instrumentation   11 ( 04 )   C04010-1   2016.4

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  • A Concept of Cross-Ferroic Plasma Turbulence Reviewed International journal

    S. Inagaki, T Kobayashi, Y Kosuga, Sanae-I. Itoh, T Mitsuzono, Nagashima Yoshihiko, H Arakawa, T Yamada, Y Miwa, Naohiro Kasuya, M. Sasaki, M Lesur, Fujisawa Akihide, K Itoh

    Scientific Reports   6   22189-1 - 22189-6   2016.2

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    DOI: 10.1038/srep22189

  • Tomography as a promising diagnostic tool for plasma turbulence Reviewed International journal

    Fujisawa Akihide, Nagashima Yoshihiko, S. Inagaki, Takumi Onchi, S Ohshima, A Shimizu

    Plasma Physics and Controlled Fusion   58 ( 2 )   025005-1 - 025005-10   2016.1

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  • Multiple wall-reflection effect in adaptive-array differential-phase reflectometry on QUEST Reviewed International journal

    H.Idei, MISHRA KISHORE KANTI, MK Yamamoto, Nagashima Yoshihiko, M Hamasaki, Y Hayashi, Takumi Onchi, K.Hanada, zushi hideki

    Journal of Instrumentation   11 ( 1 )   C01014-1   2016.1

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  • First measurement of electron temperature and density profiles for spherical tokamak plasmas sustained by lower hybrid wave Reviewed International journal

    10   1202082-1 - 1202082-2   2015.12

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  • Analysis of plasma equilibrium based on orbit-driven current density profile in steady-state plasma on QUEST Reviewed International journal

    Kazuo Nakamura, M M Alam, YZ Jiang, O Mitarai, K Kurihara, Y Kawamata, M Sueoka, M Takechi, Makoto Hasegawa, K. Tokunaga, K Araki, zushi hideki, K.Hanada, Fujisawa Akihide, H.Idei, Nagashima Yoshihiko, S Kawasaki, H Nakashima, A Higashijima

    Fusion Engineering and Design   1 - 6   2015.12

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    DOI: 10.1016/j.fusengdes.2015.11.035

  • Thomson scattering measurements in low-density plasmas in the TST-2 spherical tokamak Reviewed International journal

    Hiro Togashi, A. Ejiri, H. Homma, T. Shinya, Y. Takase, K. Toida, N. Tsujii, T. Yamaguchi, Y. Yoshida, H. Furui, M. Sonehara, Kazuo Nakamura, W. Takahashi, T. Takeuchi, S. Yajima, H. Yamazaki,, Makoto Hasegawa, Nagashima Yoshihiko, H. Tojo

    Journal of Instrumentation   10   C12020-1 - C12020-9   2015.12

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  • Azimuthal inhomogeneity of turbulence structure and its impact on intermittent particle transport in linear magnetized plasmas Reviewed International journal

    Tatsuya Kobayashi, S. Inagaki, M. Sasaki, Y Kosuga, H Arakawa, T Yamada, Nagashima Yoshihiko, Y Miwa, Naohiro Kasuya, Fujisawa Akihide, Sanae-I. Itoh, K Itoh

    Physics of Plasmas   22 ( 11 )   112301-1 - 112301-8   2015.11

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    DOI: http://dx.doi.org/10.1063/1.4934537

  • Comparison of current density profiles based on particle orbit-driven current in steady-state plasma on QUEST Reviewed International journal

    Md Mahbub Alam, Kazuo Nakamura, Fan Xia, Osamu Mitarai, Makoto Hasegawa, K. Tokunaga, Kuniaki Araki, zushi hideki, K.Hanada, Fujisawa Akihide, H.Idei, Nagashima Yoshihiko, Shoji Kawasaki, Hisatoshi Nakashima, Aki Higashijima, Takahiro Nagata

    Fusion Engineering and Design   1 - 7   2015.11

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    DOI: 10.1016/j.fusengdes.2015.11.007

  • Development of a high-performance control system by decentralization with reflective memory on QUEST Reviewed International journal

    Makoto Hasegawa, Kazuo Nakamura, zushi hideki, K.Hanada, Fujisawa Akihide, Osamu Mitarai, K. Tokunaga, H.Idei, Nagashima Yoshihiko, Shoji Kawasaki, Hisatoshi Nakashima, Aki Higashijima

    Fusion Engineering and Design   96   629 - 632   2015.10

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    DOI: 10.1016/j.fusengdes.2015.06.054

  • Heat flux and plasma flow in the far scrape-off layer of the inboard poloidal field null configuration in QUEST Reviewed International journal

    Takumi Onchi, zushi hideki, Y Mahira, K Nagaoka, K.Hanada, H.Idei, Makoto Hasegawa, Kazuo Nakamura, Fujisawa Akihide, Nagashima Yoshihiko, K Matsuoka, S Tashima, BANERJEE SANTANU, Aleksandrovich Arseniy Kuzmin, S Kawasaki, H Nakashima, A Higashijima, Osamu Watanabe

    Physics of Plasmas   22 ( 8 )   082513-1 - 082513-14   2015.8

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    DOI: http://dx.doi.org/10.1063/1.4928878

  • Particle balance in long duration RF driven plasmas on QUEST Reviewed International journal

    K.Hanada, zushi hideki, Naoaki Yoshida, N Yugami, T Honda, Makoto Hasegawa, MISHRA KISHORE KANTI, Aleksandrovich Arseniy Kuzmin, Kazuo Nakamura, Fujisawa Akihide, H.Idei, Nagashima Yoshihiko, Osamu Watanabe, Takumi Onchi, H. Watanabe, K. Tokunaga, A Higashijima, S Kawasaki, H Nakashima

    Journal of Nuclear Materials   463   1084 - 1086   2015.8

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  • Global gas balance and influence of atomic hydrogen irradiation on the wall inventory in steady-state operation of QUEST tokamak Reviewed International journal

    Aleksandrovich Arseniy Kuzmin, zushi hideki, I Takagi, SK Sharma, RUSINOV ALEKSANDR, Y Inoue, Y Hirooka, H Zhou, M Kobayashi, Mizuki Sakamoto, K.Hanada, Naoaki Yoshida, Kazuo Nakamura, Fujisawa Akihide, K Matsuoka, H.Idei, Nagashima Yoshihiko, Makoto Hasegawa, Takumi Onchi

    Journal of Nuclear Materials   463   1087 - 1090   2015.8

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    Language:English   Publishing type:Research paper (scientific journal)  

  • Observation of heat flux and plasma flow in scrape off layer in QUEST Reviewed International journal

    Takumi Onchi, Y Mahira, K Nagaoka, A Tashima, BANERJEE SANTANU, MISHRA KISHORE KANTI, H.Idei, K.Hanada, Kazuo Nakamura, Fujisawa Akihide, Nagashima Yoshihiko, Makoto Hasegawa, K Matsuoka, Aleksandrovich Arseniy Kuzmin, Osamu Watanabe, S Kawasaki, H Nakashima, A Higashijima

    Journal of Nuclear Materials   463   428 - 431   2015.8

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    DOI: 10.1016/j.jnucmat.2014.11.136

  • Self organization of high βp plasma equilibrium with an inboard poloidal magnetic field null in QUEST Reviewed International journal

    55   083009-1 - 083009-13   2015.7

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  • Non-inductive Plasma Start-up Experiments on the TST-2 Spherical Tokamak Using Waves in the Lower-hybrid Frequency Range Reviewed International journal

    Takahiro Shinya, Takase, Y., Wakatsuki, T., Ejiri, A., Furui, H., Hiratsuka, J., Imamura, K., Inada, T., Kakuda, H., Kasahara, H., Kumazawa, R., Moeller, C., Mutoh, T., Nagashima Yoshihiko, Kazuo Nakamura, Nakanishi, A., Oosako, T., Saito, K., Seki, T.

    Nuclear Fusion   55 ( 7 )   073003-1 - 073003-8   2015.6

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    DOI: 10.1088/0029-5515/55/7/073003

  • Edge plasma dynamics during L-H transition in the JFT-2M tokamak Reviewed International journal

    Kobayashi, T., Itoh, K., Ido, T., Kamiya, K., Sanae-I. Itoh, Miura, Y., Nagashima Yoshihiko, Fujisawa Akihide, S. Inagaki, Ida, K., Hoshino, K.

    NUCLEAR FUSION   55 ( 6 )   063009-1 - 063009-7   2015.6

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    DOI: 10.1088/0029-5515/55/6/063009

  • Dynamical programming based turbulence velocimetry for fast visible imaging of tokamak plasma Reviewed International journal

    Santanu Banerjee, H Zushi, N Nishino, K Mishra, T Onchi, A Kuzmin, Y Nagashima, K Hanada, K Nakamura, H Idei, M Hasegawa, A Fujisawa

    Review of Scientific Instruments   86.0 ( 3.0 )   2015.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.4914838

  • Simultaneous measurement of plasma pressure anisotropy with a double-pass Thomson scattering diagnostic system on the TST-2 Reviewed International journal

    Jun'ichi Hiratsuka, Akira EJIRI, Makoto Hasegawa, Nagashima Yoshihiko, Keishun NAKAMURA, Yuichi TAKASE, Hiro TOGASHI, Hiroshi TOJO, Takashi YAMAGUCHI

    Plasma and Fusion Research   10   1402007-1 - 1402007-6   2015.2

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  • Particle balance in long duration RF driven plasmas on QUEST Reviewed International journal

    K Hanada, H Zushi, N Yoshida, N Yugami, T Honda, M Hasegawa, K Mishra, A Kuzmin, K Nakamura, A Fujisawa, H Idei, Y Nagashima, O Watanabe, T Onchi, H Watanabe, K Tokunaga, A Higashijima, S Kawasaki, H Nakashima, Y Takase, A Fukuyama, O Mitarai, YKM Peng

    Journal of Nuclear Materials   2015.1

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    DOI: 10.1016/j.jnucmat.2015.01.013

  • Global gas balance and influence of atomic hydrogen irradiation on the wall inventory in steady-state operation of QUEST tokamak Reviewed International journal

    A Kuzmin, H Zushi, I Takagi, SK Sharma, A Rusinov, Y Inoue, Y Hirooka, H Zhou, M Kobayashi, M Sakamoto, K Hanada, N Yoshida, K Nakamura, A Fujisawa, K Matsuoka, H Idei, Y Nagashima, M Hasegawa, T Onchi, S Banerjee, K Mishra

    Journal of Nuclear Materials   2014.12

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    DOI: 10.1016/j.jnucmat.2014.12.092

  • Observation of heat flux and plasma flow in scrape off layer in QUEST Reviewed International journal

    T Onchi, Y Mahira, K Nagaoka, S Tashima, S Banerjee, K Mishra, H Idei, K Hanada, K Nakamura, A Fujisawa, Y Nagashima, M Hasegawa, K Matsuoka, A Kuzmin, O Watanabe, S Kawasaki, H Nakashima, A Higashijima

    Journal of Nuclear Materials   2014.12

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    DOI: 10.1016/j.jnucmat.2014.11.136

  • Thermal imaging of plasma with a phased array antenna in QUEST Reviewed International journal

    REVIEW OF SCIENTIFIC INSTRUMENTS   85.0 ( 11.0 )   2014.11

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    DOI: 10.1063/1.4889903

  • End plate biasing experiments in linear magnetized plasmas Reviewed International journal

    T. Yamada, S. Inagaki, T. Kobayashi, Y. Nagashima, T. Mitsuzono, Y. Miwa, K. Nakanishi, H. Fujino, M. Sasaki, N. Kasuya, M. Lesur, Y. Kosuga, A. Fujisawa, S.-I. Itoh and K. Itoh

    NUCLEAR FUSION   54.0 ( 11.0 )   2014.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0029-5515/54/11/114010

  • Demonstration of improvement in the signal-to-noise ratio of Thomson scattering signal obtained by using a multi-pass optical cavity on the Tokyo Spherical Tokamak-2 Reviewed International journal

    H Togashi, A Ejiri, J Hiratsuka, K Nakamura, Y Takase, T Yamaguchi, H Furui, K Imamura, T Inada, H Kakuda, A Nakanishi, T Oosako, T Shinya, M Sonehara, S Tsuda, N Tsujii, T Wakatsuki, M Hasegawa, Y Nagashima, K Narihara, I Yamada, H Tojo

    Review of Scientific Instruments   85.0 ( 11.0 )   2014.11

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    DOI: 10.1063/1.4891707

  • Local current density measurement using a Rogowski probe in Tokyo Spherical Tokamak-2 Reviewed International journal

    H Furui, Y Nagashima, Y Takase, A Ejiri, H Kakuda, M Sonehara, T Oosako, N Tsujii, J Hiratsuka, K Imamura, T Inada, K Nakamura, A Nakanishi, T Shinya, H Togashi, S Tsuda, T Wakatsuki, T Yamaguchi

    Review of Scientific Instruments   85.0 ( 11.0 )   2014.11

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    DOI: 10.1063/1.4887277

  • Development of a plasma control system for steady-state operation on QUEST Reviewed International journal

    Makoto Hasegwa, Kazuo Nakamura, Hideki Zushi, Kazuaki Hanada, Akihide Fujisawa, Keisuke Matsuoka, Hiroshi Idei, Yoshihiko Nagashima, Kazutoshi Tokunaga, Shoji Kawasaki, Hisatoshi Nakashima, Aki Higashijima

    Journal of the Korean Physical Society   65.0 ( 8.0 )   2014.10

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    DOI: 10.3938/jkps.65.1191

  • Shape Reconstruction of RF-Driven Divertor Plasma on QUEST Reviewed International journal

    Nakamura, Kazuo; Fujita, H.; Liu, X. L.; Xue, E. B.; Xia, Fan; Mitarai, Osamu; Kurihara, Kenichi; Kawamata, Y.; Sueoka, M.; Hasegawa, Makoto; Tokunaga, Kazutoshi; Zushi, H.; Hanada, K.; Fujisawa, A.; Matsuoka, K.; Idei, H.; Nagashima, Y.; Kawasaki, S.; Nakashima, H.; Higashijima, A.; Araki, Kuniaki; Fukuyama, A.

    IEEE TRANSACTIONS ON PLASMA SCIENCE   42.0 ( 9.0 )   2014.9

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    DOI: 10.1109/TPS.2014.2341616

  • Plasma current start-up experiments using a dielectric-loaded waveguide array antenna in the TST-2 spherical tokamak Reviewed International journal

    Wakatsuki, T.; Ejiri, A.; Shinya, T.; Takase, Y.; Furui, H.; Hiratsuka, J.; Imamura, K.; Inada, T.; Kakuda, H.; Kasahara, H.; Nagashima, Y.; Nakamura, K.; Nakanishi, A.; Oosako, T.; Saito, K.; Seki, T.; Sonehara, M.; Togashi, H.; Tsuda, S.; Tsujii, N.; Yamaguchi, T.

    NUCLEAR FUSION   54.0 ( 9.0 )   2014.9

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    DOI: 10.1088/0029-5515/54/9/093014

  • Analytical Solution of High βp Equilibria with Natural Inboard Poloidal Null Configuration Obtained in the Spherical Tokamak QUEST Reviewed International journal

    9.0 ( RC )   2014.7

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    High βp (εβp 1) equilibria obtained in a ECW heated Ohmic plasma is investigated using a simple analytic solution of Grad-Shafranov equation. The formation of a natural inboard poloidal null associated with high βp is explained consistently by high diamagnetism and negative triangularity. As βp is increased, the poloidal null point penetrates further into the vacuum vessel, which is qualitatively explained by the analytic model. Transition from inboard (high field side) limiter bound to the natural divertor configuration is associated with a reduction of the edge safety factor without appreciable enhancement of MHD activities. Such a scenario is also addressed successfully with the model.

    DOI: 10.1585/pfr.9.3402093

  • Role of stochasticity in turbulence and convective intermittent transport at the scrape off layer of Ohmic plasma in QUEST Reviewed International journal

    Banerjee, Santanu; Zushi, H.; Nishino, N.; Hanada, K.; Ishiguro, M.; Tashima, S.; Liu, H. Q.; Mishra, K.; Nakamura, K.; Idei, H.; Hasegawa, M.; Fujisawa, A.; Nagashima, Y.; Matsuoka, K.

    PHYSICS OF PLASMAS   21.0 ( 7.0 )   2014.7

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    DOI: 10.1063/1.4890359

  • Dynamics of edge limit cycle oscillation in the JFT-2M Tokamak Reviewed International journal

    Kobayashi, T.; Itoh, K.; Ido, T.; Kamiya, K.; Itoh, S. -I.; Miura, Y.; Nagashima, Y.; Fujisawa, A.; Inagaki, S.; Ida, K.; Kasuya, N.; Hoshino, K.

    NUCLEAR FUSION   54.0 ( 7.0 )   2014.7

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    DOI: 10.1088/0029-5515/54/7/073017

  • Multi-pass Thomson Scattering Measurement on the TST-2 Spherical Tokamak Reviewed International journal

    H. Togashi, A. Ejiri, K. Nakamura, Y. Takase, T. Yamaguchi, H. Furui, K. Imamura, T. Inada, H. Kakuda, A. Nakanishi, T. Oosako, T. Shinya, M. Sonehara, S. Tsuda, N. Tsujii, T. Wakatsuki, makoto hasegawa, Yoshihiko Nagashima, K. Narihara, I. Yamada and H. Tojo

    REVIEW OF SCIENTIFIC INSTRUMENTS   85.0   2014.6

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  • Analytical Solution of High βp Equilibria with Natural Inboard Poloidal Null Configuration Obtained in the Spherical Tokamak QUEST Reviewed International journal

    9.0 ( RA )   2014.6

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  • Development of a Local Current Diagnostic using a Small Rogowski Coil for a Spherical Tokamak Plasma in TST-2 Reviewed International journal

    Hirokazu FURUI, Yoshihiko NAGASHIMA, Yuich TAKASE, Akira EJIRI, Hidetoshi KAKUDA, Masateru SONEHARA, Takuya OOSAKO, Naoto TSUJII, Junichi HIRATSUKA, Kazuhiro IMAMURA, Takuma INADA, Keishun NAKAMURA, Ayaka NAKANISHI, Takahiro SHINYA, Hiro TOGASHI, Shintarou TSUDA, Takuma WAKATSUKI and Takashi YAMAGUCHI

    Plasma and Fusion Research   9.0 ( RA )   2014.6

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  • Note: Multi-pass Thomson scattering measurement on the TST-2 spherical tokamak Reviewed International journal

    Togashi, H.; Ejiri, A.; Hiratsuka, J.; Nakamura, K.; Takase, Y.; Yamaguchi, T.; Furui, H.; Imamura, K.; Inada, T.; Kakuda, H.; Nakanishi, A.; Oosako, T.; Shinya, T.; Sonehara, M.; Tsuda, S.; Tsujii, N.; Wakatsuki, T.; Hasegawa, M.; Nagashima, Y.; Narihara, K.; Yamada, I.; Tojo, H.

    REVIEW OF SCIENTIFIC INSTRUMENTS   85.0 ( 5.0 )   2014.5

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    DOI: 10.1063/1.4878260

  • Identification of Waves by RF Magnetic Probes during Lower Hybrid Wave Injection Experiments on the TST-2 Spherical Tokamak Reviewed International journal

    Takahiro SHINYA, Akira EJIRI, Yuichi TAKASE, Takuma WAKATSUKI, Takuya OOSAKO, Naoto TSUJII, Hidetoshi KAKUDA, Hirokazu FURUI, Junichi HIRATSUKA, Takuma INADA, Kazuhiro IMAMURA, Keishun NAKAMURA, Ayaka NAKANISHI, Masateru SONEHARA, Hiro TOGASHI, Shintaro TSUDA, Takashi YAMAGUCHI, Hiroshi KASAHARA, Kenji SAITO, Tetsuo SEKI, Fujio SHIMPO, Yoshihiko NAGASHIMA, Osamu WATANABE and Takuma YAMADA

    Plasma and Fusion Research   9.0 ( RA )   2014.5

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  • Identification of Quasi-Periodic Nonlinear Waveforms in Turbulent Plasmas Reviewed International journal

    Shigeru INAGAKI, Yudai MIWA, Tatsuya KOBAYASHI, Takuma YAMADA, Yoshihiko NAGASHIMA, Tomohiro MITSUZONO, Hiromitsu FUJINO, Makoto SASAKI, Naohiro KASUYA, Maxime LESUR, Yusuke KOSUGA, Akihide FUJISAWA, Sanae-I. ITOH and Kimitaka ITOH

    Plasma and Fusion Research   9.0 ( RC )   2014.3

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  • Role of energetic electrons during current ramp-up and production of high poloidal beta plasma in non-inductive current drive on QUEST Reviewed International journal

    Tashima, Saya; Zushi, H.; Isobe, M.; Hanada, K.; Idei, H.; Nakamura, K.; Fujisawa, A.; Matsuoka, K.; Hasegawa, M.; Nagashima, Y.; Okamura, S.; Banerjee, S.; Kawasaki, S.; Nakashima, H.; Higashijima, A.

    NUCLEAR FUSION   54.0 ( 2.0 )   2014.2

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    DOI: 10.1088/0029-5515/54/2/023010

  • Injection and Confinement of a Laser Pulse in an Optical Cavity for Multi-Pass Thomson Scattering Diagnostics in the TST-2 Spherical Tokamak Device Reviewed International journal

    Hiro TOGASHI, Akira EJIRI, Makoto HASEGAWA, Junichi HIRATSUKA, Yoshihiko NAGASHIMA, Keishun NAKAMURA, Kazumichi NARIHARA, Yuichi TAKASE, Hiroshi TOJO, Naoto TSUJII, Ichihiro YAMADA, Takashi YAMAGUCHI and the TST-2 Team

    Plasma and Fusion Research   9.0 ( RC )   2014.1

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  • Sawtooth-triggered limit-cycle oscillations and I-phase in the HL-2A tokamak Reviewed International journal

    Zhao, K. J.; Cheng, J.; Diamond, P. H.; Dong, J. Q.; Yan, L. W.; Hong, W. Y.; Xu, M.; Tynan, G.; Miki, K.; Huang, Z. H.; Itoh, K.; Itoh, S-I; Fujisawa, A.; Nagashima, Y.; Inagaki, S.; Wang, Z. X.; Wei, L.; Song, X. M.; Lei, G. J.; Li, Q.; Ji, X. Q.; Liu, Yi; Yang, Q. W.; Ding, X. T.; Duan, X. R.

    NUCLEAR FUSION   53.0 ( 12.0 )   2013.12

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    DOI: 10.1088/0029-5515/53/12/123015

  • Measurement of Dynamical Density Profiles Using a Microwave Frequency Comb Reflectometer Reviewed International journal

    Shigeru INAGAKI, Kimitaka ITOH, Takuma YAMADA, Sanae-I. ITOH, Tokihiko TOKUZAWA, Akihide FUJISAWA, Naohiro KASUYA, Makoto SASAKI, Yoshihiko NAGASHIMA and Hiroyuki ARAKAWA

    Plasma and Fusion Research   8.0 ( RC )   2013.12

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  • Development of plasma control system for divertor configuration on QUEST Reviewed International journal

    Hasegawa, M.; Nakamura, K.; Zushi, H.; Hanada, K.; Fujisawa, A.; Matsuoka, K.; Mitarai, O.; Idei, H.; Nagashima, Y.; Tokunaga, K.; Kawasaki, S.; Nakashima, H.; Higashijima, A.

    FUSION ENGINEERING AND DESIGN   88.0 ( 6.0 )   2013.10

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    DOI: 10.1016/j.fusengdes.2013.03.035

  • Statistical Analyses of Turbulent Particle and Momentum Fluxes in a Cylindrical Magnetized Plasma Reviewed International journal

    Makoto SASAKI, Naohiro KASUYA, Masatoshi YAGI, Kimitaka ITOH, Yoshihiko NAGASHIMA, Shigeru INAGAKI and Sanae-I. ITOH

    Plasma and Fusion Research   8.0 ( RA )   2013.9

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  • Evaluation of Excitation Conditions of ITG Modes in the PANTA Reviewed International journal

    Yudai MIWA, Naohiro KASUYA, Makoto SASAKI, Shigeru INAGAKI, Kimitaka ITOH, Masatoshi YAGI, Akihide FUJISAWA, Yoshihiko NAGASHIMA, Maxime LESUR, Tatsuya KOBAYASHI, Soutarou YAMADA, Tetsuo YAMASHITA, Satoshi OTSUBO, Shinsuke KAKIGAWA, Tomohiro MITSUZONO, Hirofumi FUJINO and Sanae-I. ITOH

    Plasma and Fusion Research   8.0 ( RA )   2013.9

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  • Non-Inductive Current Drive by EC Waves in an Inboard Poloidal Magnetic Field Null Configuration on the Spherical Tokamak QUEST Reviewed International journal

    Saya TASHIMA, Hideki ZUSHI, Mitsutaka ISOBE, Hiroshi IDEI, Shoichi OKAMURA, Kazuaki HANADA, Kazuo NAKAMURA, Akihide FUJISAWA, Keisuke MATSUOKA, Makoto HASEGAWA, Yoshihiko NAGASHIMA, Shoji KAWASAKI, Hisatoshi NAKASHIMA, Aki HIGASHIJIMA and QUEST Team

    Plasma and Fusion Research   8.0 ( RA )   2013.9

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  • Turbulence Velocimetry of Tangential Fast Imaging Data on QUEST Reviewed International journal

    Santanu BANERJEE, Hideki ZUSHI, Nobuhiro NISHINO, Yoshihiko NAGASHIMA, Kazuaki HANADA, Saya TASHIMA, Tsubasa INOUE, Kazuo NAKAMURA, Hiroshi IDEI, Makoto HASEGAWA, Akihide FUJISAWA and Keisuke MATSUOKA

    Plasma and Fusion Research   8.0 ( RA )   2013.8

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  • Spatial structures and interaction of multiple sheared flow populations in tokamak edge turbulence Reviewed International journal

    Zhao, K. J.; Dong, J. Q.; Yan, L. W.; Diamond, P. H.; Cheng, J.; Hong, W. Y.; Huang, Z. H.; Xu, M.; Tynan, G. R.; Itoh, K.; Itoh, S. -I.; Fujisawa, A.; Nagashima, Y.; Inagaki, S.; Wang, Z. X.; Wei, L.; Li, Q.; Ji, X. Q.; Huang, Y.; Liu, Yi.; Zhou, J.; Song, X. M.; Yang, Q. W.; Ding, X. T.; Duan, X. R.

    NUCLEAR FUSION   53.0 ( 8.0 )   2013.8

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    DOI: 10.1088/0029-5515/53/8/083011

  • Spatiotemporal Structures of Edge Limit-Cycle Oscillation before L-to-H Transition in the JFT-2M Tokamak Reviewed International journal

    Kobayashi, T.; Itoh, K.; Ido, T.; Kamiya, K.; Itoh, S. -I.; Miura, Y.; Nagashima, Y.; Fujisawa, A.; Inagaki, S.; Ida, K.; Hoshino, K.

    PHYSICAL REVIEW LETTERS   111.0 ( 3.0 )   2013.7

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    DOI: 10.1103/PhysRevLett.111.035002

  • Non-inductive plasma initiation and plasma current ramp-up on the TST-2 spherical tokamak Reviewed International journal

    Takase, Y.; Ejiri, A.; Kakuda, H.; Oosako, T.; Shinya, T.; Wakatsuki, T.; Ambo, T.; Furui, H.; Hashimoto, T.; Hiratsuka, J.; Kasahara, H.; Kato, K.; Kumazawa, R.; Moeller, C. P.; Mutoh, T.; Nakanishi, A.; Nagashima, Y.; Saito, K.; Sakamoto, T.; Seki, T.; Sonehara, M.; Shino, R.; Togashi, H.; Watanabe, O.; Yamaguchi, T.

    NUCLEAR FUSION   53.0 ( 6.0 )   2013.6

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    DOI: 10.1088/0029-5515/53/6/063006

  • Streamer Structures in Experiment and Modeling Reviewed International journal

    Takuma YAMADA, Makoto SASAKI, Naohiro KASUYA, Yoshihiko NAGASHIMA, Shigeru INAGAKI, Tatsuya KOBAYASHI, Masatoshi YAGI, Akihide FUJISAWA, Sanae-I. ITOH and Kimitaka ITOH

    Plasma and Fusion Research   8.0 ( RA )   2013.4

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  • On turbulence-correlation analysis based on correlation reflectometry Reviewed International journal

    Teplova (Kosolapova), N.; Itoh, K.; Itoh, S-I; Gusakov, E.; Heuraux, S.; Inagaki, S.; Sasaki, M.; Kobayashi, T.; Nagashima, Y.; Oldenbuerger, S.; Fujisawa, A.

    PHYSICA SCRIPTA   87.0 ( 4.0 )   2013.4

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    DOI: 10.1088/0031-8949/87/04/045502

  • Electron Temperature Measurement on QUEST Spherical Tokamak by Thomson Scattering System Reviewed International journal

    Takashi YAMAGUCHI, Akira EJIRI, Junichi HIRATSUKA, Makoto HASEGAWA, Yoshihiko NAGASHIMA, Kazumichi NARIHARA, Yuichi TAKASE, Hideki ZUSHI and the QUEST group

    Plasma and Fusion Research   8.0 ( RA )   2013.2

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  • Self-nonlinear coupling of long-range temperature fluctuation in Toroidal plasma Reviewed International journal

    Kobayashi, T.; Inagaki, S.; Itoh, S-I; Itoh, K.; Oldenbuerger, S.; Fujisawa, A.; Nagashima, Y.; Ida, K.; Tsuchiya, H.; Nagayama, Y.; Kawahata, K.; Yamada, H.

    PLASMA PHYSICS AND CONTROLLED FUSION   54.0 ( 11.0 )   2012.11

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    DOI: 10.1088/0741-3335/54/11/115004

  • Spatiotemporal dynamic characteristics and self-nonlinear coupling of long-range temperature fluctuation in Toroidal plasma Reviewed International journal

    PLASMA PHYSICS AND CONTROLLED FUSION   2012.10

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  • Configuration of Flows in a Cylindrical Plasma Device Reviewed International journal

    Stella OLDENBRGER, Kazuya URIU, Tatsuya KOBAYASHI, Shigeru INAGAKI, Makoto SASAKI, Yoshihiko NAGASHIMA, Takuma YAMADA, Akihide FUJISAWA, Sanae-I. ITOH and Kimitaka ITOH

    Plasma and Fusion Research   7.0 ( RA )   2012.10

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  • Evaluation of Electron Temperature Fluctuations Using a Conditional Technique Reviewed International journal

    Soutaro YAMADA, Shigeru INAGAKI, Stella OLDENBRGER, Tatsuya KOBAYASHI, Katsuyuki KAWASHIMA, Noriko OHYAMA, Yuki TOBIMATSU, Hiroyuki ARAKAWA, Yoshihiko NAGASHIMA, Takuma YAMADA, Makoto SASAKI, Masatoshi YAGI, Naohiro KASUYA, Akihide FUJISAWA, Sanae-I. ITOH and Kimitaka ITOH

    Plasma and Fusion Research   7.0 ( RA )   2012.10

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  • Fast visible imaging and edge turbulence analysis in QUEST Reviewed International journal

    Banerjee, Santanu; Zushi, H.; Nishino, N.; Nagashima, Y.; Hanada, K.; Ishiguro, M.; Ryoukai, T.; Tashima, S.; Inoue, T.; Nakamura, K.; Idei, H.; Hasegawa, M.; Fujisawa, A.; Matsuoka, K.

    REVIEW OF SCIENTIFIC INSTRUMENTS   83.0 ( 10.0 )   2012.10

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    DOI: 10.1063/1.4739080

  • On influences of long-range fluctuations on transport in Large Helical Device plasmas Reviewed International journal

    Itoh, K.; Itoh, S-I; Inagaki, S.; Kobayashi, T.; Fujisawa, A.; Nagashima, Y.; Urger, S. Oldenb; Ida, K.; Tokuzawa, T.; Nagayama, Y.; Kawahata, K.; Yamada, H.

    PLASMA PHYSICS AND CONTROLLED FUSION   54.0 ( 9.0 )   2012.9

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    DOI: 10.1088/0741-3335/54/9/095016

  • ECW/EBW Heating and Current Drive Experiment Results and Prospects for CW Operation in QUEST Reviewed International journal

    Hiroshi IDEI, Hideki ZUSHI, Kazuaki HANADA, Evgeniya KALINNIKOVA, Kazuo NAKAMURA, Akihide FUJISAWA, Yoshihiko NAGASHIMA, Makoto HASEGAWA, Keisuke MATSUOKA, Tsuyoshi KARIYA, Tsuyoshi IMAI, Ryutaro MINAMI, Naoaki YOSHIDA, Mizuki SAKAMOTO, Hideo WATANABE, Kazutoshi TOKUNAGA, Akira EJIRI, Masatsugu SAKAGUCHI, Masaki ISHIGURO, Saya TASHIMA, Atsushi FUKUYAMA, Hiroe IGAMI, Shin KUBO, Mitsutaka ISOBE, Kenichi NAGAOKA, Hideya NAKANISHI, Nobuhiro NISHINO, Shoji KAWASAKI, Hisatoshi NAKASHIMA, Aki HIGASHIJIMA, Yuichi TAKASE, Takashi MAEKAWA, Osamu MITARAI, Mitsuru KIKUCHI and Kazuo TOI

    Plasma and Fusion Research   7.0 ( RA )   2012.9

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  • X-ray Measurements during Plasma Current Start-up Experiments using the Lower Hybrid Wave on the TST-2 Spherical Tokamak Reviewed International journal

    Takuma Wakatsuki, Akira Ejiri, Hidetoshi Kakuda, Yuichi Takase, Takanori Ambo, Hirokazu Furui, Takahiro Hashimoto, Junichi Hiratsuka, Hiroshi Kasahara, Kunihiko Kato, Ryuhei Kumazawa, Yoshihiko Nagashima, Kenji Saito, Takuya Sakamoto, Tetsuo Seki, Fujio Shimpo, Ryota Shino, Takahiro Shinya, Masateru Sonehara, Osamu Watanabe, Takashi Yamaguchi, Charles P. Moelle

    IEEJ Transactions on Fundamentals and Materials   132.0   2012.7

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  • Fluctuation Measurement Across the Broad Range of the Lowfield Side Edge Plasmas in the TST2 Spherical Tokamak Reviewed International journal

    M. Sonehara, Nagashima Yoshihiko, Y. Takase, A. Ejiri, et al.

    IEEJ Transactions on Fundamentals and Materials   132.0 ( 7.0 )   2012.7

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  • Off-Axis Temperature Anisotropy Measurement by Double-Pass Thomson Scattering Diagnostic System on TST-2 Reviewed International journal

    Junichi HIRATSUKA, Akira EJIRI, hasegawa makoto, Nagashima Yoshihiko, Yuichi TAKASE, Hiroshi TOJO, Takashi YAMAGUCHI, Takanori AMBO, Hirokazu FURUI, Takahiro HASHIMOTO, Hidetoshi KAKUDA, Kunihiko KATO, Takuya OOSAKO, Takuya SAKAMOTO, Ryota SHINO, Takahiro SHINYA, Masateru SONEHARA, Takuma WAKATSUKI, Osamu WATANABE

    Plasma and Fusion Research   7.0 ( RA )   2012.7

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  • QUEST Experiments Towards Steady State Operation of Spherical Tokamaks Reviewed International journal

    Kazuaki Hanada, Hideki Zushi, Hiroshi Idei, Kazuo Nakamura, Masaki Ishiguro, Saya Tashima, Evgeniya Kalinnikova, Mizuki Sakamoto, Makoto Hasegawa, Akihide Fujisawa, Konosuke Sato, Naoaki Yoshida, Hideo Watanabe, Kazutoshi Tokunaga, Yoshihiko Nagashima, Aki Higashijima, Shoji Kawasaki, Hisatoshi Nakashima, Haiqing Liu, Osamu Mitarai, Takashi Maekawa, Atsushi Fukuyama, Yuichi Takase, Jinping Qian

    IEEJ Transactions on Fundamentals and Materials   132.0 ( 7.0 )   2012.7

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  • Time Evolution of Power Spectrum Density in Spontaneous Transition in Cylindrical Magnetized Plasma Reviewed International journal

    Tatsuya KOBAYASHI, Shigeru INAGAKI, Stella OLDENBRGER, Katsuyuki KAWASHIMA, Noriko OHYAMA, Yuuki TOBIMATSU, Hiroyuki ARAKAWA, Makoto SASAKI, Yoshihiko NAGASHIMA, Takuma YAMADA, Satoru SUGITA, Masatoshi YAGI, Naohiro KASUYA, Akihide FUJISAWA, Sanae-I. ITOH and Kimitaka ITOH

    Plasma and Fusion Research   7.0 ( RA )   2012.6

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  • Non-inductive current start-up assisted by energetic electrons in Q-shu University experiment with steady-state spherical tokamak Reviewed International journal

    Ishiguro, Masaki; Hanada, Kazuaki; Liu, Haiqing; Zushi, Hideki; Nakamura, Kazuo; Fujisawa, Akihide; Idei, Hiroshi; Nagashima, Yoshihiko; Hasegawa, Makoto; Tashima, Saya; Takase, Yuichi; Kishimoto, Yasuaki; Mitarai, Osamu; Kawasaki, Shoji; Nakashima, Hisatoshi; Higashijima, Aki

    PHYSICS OF PLASMAS   19.0 ( 6.0 )   2012.6

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    DOI: 10.1063/1.4731700

  • Observations of Intermittent Structures in the Periphery of a Cylindrical Linear Plasma in PANTA Reviewed International journal

    Noriko OHYAMA, Akihide FUJISAWA, Shigeru INAGAKI, Yoshihiko NAGASHIMA, Stella OLDENBRGER, Tatsuya KOBAYASHI, Katsuyuki KAWASHIMA, Yuuki TOBIMATSU, Tetsuo YAMASHITA, Soutaro YAMADA, Hiroyuki ARAKAWA, Takuma YAMADA, Masatoshi YAGI, Naohiro KASUYA, Makoto SASAKI, Sanae-I. ITOH and Kimitaka ITOH

    Plasma and Fusion Research   7.0 ( RC )   2012.4

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  • Dynamic interaction between a solitary drift wave structure and zonal flows in a linear cylindrical device Reviewed International journal

    Arakawa, H.; Kobayashi, T.; Inagaki, S.; Kasuya, N.; Oldenbuerger, S.; Nagashima, Y.; Yamada, T.; Yagi, M.; Fujisawa, A.; Itoh, K.; Itoh, S-I

    PLASMA PHYSICS AND CONTROLLED FUSION   53.0 ( 11.0 )   2011.11

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    DOI: 10.1088/0741-3335/53/11/115009

  • Development of a Double-pass Thomson Scattering System in the TST-2 Spherical Tokamak Reviewed International journal

    Junichi HIRATSUKA, Akira EJIRI, Makoto HASEGAWA, Yoshihiko NAGASHIMA, Yuichi TAKASE, Hiroshi TOJO, Takashi YAMAGUCHI, Takanori AMBO, Hidetoshi KAKUDA, Takuya SAKAMOTO, Ryota SHINO, Masateru SONEHARA, Takuma WAKATSUKI and Osamu WATANABE

    Plasma and Fusion Research   6.0 ( RC )   2011.9

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  • Evaluation of Electron Temperature Fluctuations Using Two Different Probe Techniques in Plasma Assembly for Nonlinear Turbulence Analysis (PANTA) Reviewed International journal

    Katsuyuki KAWASHIMA, Yasuhiro MIYOSHI, Stella OLDENBRGER, Shigeru INAGAKI, Hiroyuki ARAKAWA, Yoshihiko NAGASHIMA, Takuma YAMADA, Makoto SASAKI, Tatsuya KOBAYASHI, Kazuya URIU, Satoru SUGITA, Masatoshi YAGI, Naohiro KASUYA, Akihide FUJISAWA, Sanae -I. ITOH and Kimitaka ITOH

    Plasma and Fusion Research   6.0 ( RA )   2011.8

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  • Observation of Nonlinear Coupling between Low Frequency Coherent Modes and Background Turbulence in LMD-U Reviewed International journal

    Tatsuya KOBAYASHI, Shigeru INAGAKI, Hiroyuki ARAKAWA, Stella OLDENBRGER, Makoto SASAKI, Yoshihiko NAGASHIMA, Takuma YAMADA, Satoru SUGITA, Masatoshi YAGI, Naohiro KASUYA, Akihide FUJISAWA, Sanae-I. ITOH and Kimitaka ITOH

    Plasma and Fusion Research   6.0 ( RA )   2011.7

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  • Development of a plasma current ramp-up technique for spherical tokamaks by the lower hybrid wave Reviewed International journal

    Y. Takase, A. Ejiri, H. Kakuda, Nagashima Yoshihiko, T. Wakatsuki, O. Watanabe, P. Bonoli, O. Meneghini, S. Shiraiwa, J Wright, C. Moeller, H. Kasahara, R. Kumazawa, T. Mutoh, K. Saito

    NUCLEAR FUSION   51.0 ( 6.0 )   2011.6

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  • Method for Estimating the Wavenumber of Standing Waves Using Three Langmuir Probes Reviewed International journal

    Tatsuya KOBAYASHI, Yoshihiko NAGASHIMA, Shigeru INAGAKI, Hiroyuki ARAKAWA, Makoto SASAKI, Takuma YAMADA, Masatoshi YAGI, Naohiro KASUYA, Akihide FUJISAWA, Sanae-I. ITOH and Kimitaka ITOH

    Plasma and Fusion Research   6.0 ( RA )   2011.5

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  • Probability Density Function of Density Fluctuations in Cylindrical Helicon Plasmas Reviewed International journal

    Hiroyuki ARAKAWA, Shigeru INAGAKI, Yoshihiko NAGASHIMA, Takuma YAMADA, Kunihiro KAMATAKI, Tatsuya KOBAYASHI, Satoru SUGITA, Masatoshi YAGI, Naohiro KASUYA, Akihide FUJISAWA, Sanae -I. ITOH and Kimitaka ITOH

    Plasma and Fusion Research   5.0 ( RA )   2010.12

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  • Bispectral Analysis of Density and Potential Fluctuations in a High Neutral Density Cylindrical Plasma Reviewed International journal

    Tatsuya KOBAYASHI, Shigeru INAGAKI, Hiroyuki ARAKAWA, Kunihiro KAMATAKI, Yoshihiko NAGASHIMA, Takuma YAMADA, Satoru SUGITA, Masatoshi YAGI, Naohiro KASUYA, Akihide FUJISAWA, Sanae -I. ITOH and Kimitaka ITOH

    Plasma and Fusion Research   5.0 ( RA )   2010.12

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  • Comparison of Hydrogen and Deuterium Plasmas in ECH Start-Up Experiment in the TST-2 Spherical Tokamak Reviewed International journal

    Osamu WATANABE, Akira EJIRI, Hiroki KURASHINA, Takuya OHSAKO, Yoshihiko NAGASHIMA, Takashi YAMAGUCHI, Takuya SAKAMOTO, Byung Il AN, Hiroyuki HAYASHI, Hiroaki KOBAYASHI, Kotaro YAMADA, Hidetoshi KAKUDA, Junichi HIRATSUKA, Kentaro HANASHIMA, Takuma WAKATSUKI, Yuichi TAKASE

    Plasma and Fusion Research   5.0 ( RA )   2010.12

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  • Development of a Thomson Scattering System in the TST-2 Spherical Tokamak Reviewed International journal

    Takashi YAMAGUCHI, Akira EJIRI, Junichi HIRATSUKA, Yuichi TAKASE, Yoshihiko NAGASHIMA, Osamu WATANABE, Takuya SAKAMOTO, Takuya OHSAKO, Byung Il AN, Hiroki KURASHINA, Hiroaki KOBAYASHI, Hiroyuki HAYASHI, Hazuki MATSUZAWA, Kotaro YAMADA, Hidetoshi KAKUDA, Kentaro HANASHIMA and Takuma WAKATSUKI

    Plasma and Fusion Research   5.0 ( RA )   2010.12

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  • ECRH Superposition on Linear Cylindrical Helicon Plasma in the LMD-U Reviewed International journal

    Kunihiro KAMATAKI, Sanae-I. ITOH, Shigeru INAGAKI, Hiroyuki ARAKAWA, Yoshihiko NAGASHIMA, Takuma YAMADA, Masatoshi YAGI, Akihide FUJISAWA and Kimitaka ITOH

    Plasma and Fusion Research   5.0 ( RA )   2010.12

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  • Merging Startup Experiments on the UTST Spherical Tokamak Reviewed International journal

    Takuma YAMADA, Ryota IMAZAWA, Shuji KAMIO, Ryuma HIHARA, Keita ABE, Morio SAKUMURA, Qinghong CAO, Takuya OOSAKO, Hiroaki KOBAYASHI, Takuma WAKATSUKI, Byungil AN, Yoshihiko NAGASHIMA, Hajime SAKAKITA, Haruhisa KOGUCHI, Satoru KIYAMA, Yoichi HIRANO, Michiaki INOMOTO, Akira EJIRI, Yuichi TAKASE and Yasushi ONO

    Plasma and Fusion Research   5.0 ( RA )   2010.12

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  • Nonlinear Mode Couplings in a Cylindrical Magnetized Plasma Reviewed International journal

    Takuma YAMADA, Sanae-I. ITOH, Shigeru INAGAKI, Yoshihiko NAGASHIMA, Shunjiro SHINOHARA, Naohiro KASUYA, Kenichiro TERASAKA, Kunihiro KAMATAKI, Hiroyuki ARAKAWA, Masatoshi YAGI, Akihide FUJISAWA and Kimitaka ITOH

    Plasma and Fusion Research   5.0 ( RA )   2010.12

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  • Observation of Quasi-Two-Dimensional Nonlinear Interactions in a Drift-Wave Streamer Reviewed International journal

    Yamada, T.; Itoh, S-I; Inagaki, S.; Nagashima, Y.; Kasuya, N.; Kamataki, K.; Arakawa, H.; Kobayashi, T.; Yagi, M.; Fujisawa, A.; Itoh, K.

    PHYSICAL REVIEW LETTERS   105.0 ( 22.0 )   2010.11

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    DOI: 10.1103/PhysRevLett.105.225002

  • Wavelet analyses using parallel computing for plasma turbulence studies Reviewed International journal

    Fujisawa, A.; Shimizu, A.; Itoh, K.; Nagashima, Y.; Yamada, T.; Inagaki, S.; Matsuoka, K.; Itoh, S-I

    PHYSICS OF PLASMAS   17.0 ( 10.0 )   2010.10

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    DOI: 10.1063/1.3488244

  • Bifurcation of the plasma turbulence on LMD-U Reviewed International journal

    Arakawa, H.; Inagaki, S.; Nagashima, Y.; Yamada, T.; Kamataki, K.; Kobayashi, T.; Sugita, S.; Yagi, M.; Kasuya, N.; Fujisawa, A.; Itoh, S-I; Itoh, K.

    PLASMA PHYSICS AND CONTROLLED FUSION   52.0 ( 10.0 )   2010.10

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    DOI: 10.1088/0741-3335/52/10/105009

  • Study of Amplitude Correlation Technique in a Cylindrical Magnetized Plasma Reviewed International journal

    Yamada, Takuma; Itoh, Sanae-I.; Inagaki, Shigeru; Nagashima, Yoshihiko; Kamataki, Kunihiro; Arakawa, Hiroyuki; Yagi, Masatoshi; Fujisawa, Akihide; Itoh, Kimitaka

    JOURNAL OF NUCLEAR MATERIALS   79.0 ( 8.0 )   2010.8

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    DOI: 10.1143/JPSJ.79.085001

  • Electron Density Measurements of Non-Inductive Start-Up Plasmas in the TST-2 Spherical Tokamak Reviewed International journal

    Hiroki KURASHINA, Akira EJIRI, Yuichi TAKASE, Kentaro HANASHIMA, Takuya SAKAMOTO, Osamu WATANABE, Yoshihiko NAGASHIMA, Takashi YAMAGUCHI, Byung Il AN, Hiroaki KOBAYASHI, Hiroyuki HAYASHI, Kotaro YAMADA, Hazuki MATSUZAWA, Hidetoshi KAKUDA, Junichi HIRATSUKA, Takuma WAKATSUKI and Takuya OOSAKO

    Plasma and Fusion Research   5.0 ( RC )   2010.7

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  • Evaluation of Edge Electron Temperature Fluctuations Using a Conditional Technique on TST-2 Reviewed International journal

    Jun'ichi OZAKI, Masateru SONEHARA, Yoshihiko NAGASHIMA, Yuichi TAKASE, Akira EJIRI, Kotaro YAMADA, Hidetoshi KAKUDA, Shigeru INAGAKI, Takuya OOSAKO, Byung Il AN, Hiroyuki HAYASHI, Kentaro HANASHIMA, Junichi HIRATSUKA, Hiroaki KOBAYASHI, Hiroki KURASHINA, Takuya SAKAMOTO, Takashi YAMAGUCHI, Osamu WATANABE and Takuma WAKATSUKI

    Plasma and Fusion Research   5.0 ( RC )   2010.6

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  • Direct Measurements of High Harmonic Fast Wave Profile in the UTST Spherical Tokamak Plasma Reviewed International journal

    Takuma WAKATSUKI, Yoshihiko NAGASHIMA, Takuya OOSAKO, Hiroaki KOBAYASHI, Byung Il AN, Hidetoshi KAKUDA, Takuma YAMADA, Ryota IMAZAWA, Osamu WATANABE, Takashi YAMAGUCHI, Hiroki KURASHINA, Hiroyuki HAYASHI, Kotaro YAMADA, Takuya SAKAMOTO, Kentaro HANASHIMA, Junichi HIRATSUKA, Shuji KAMIO, Ryuma HIHARA, Keita ABE, Morio SAKUMURA, Qinghong CAO, Michiaki INOMOTO, Yasushi ONO, Akira EJIRI and Yuichi TAKASE

    Plasma and Fusion Research   5.0 ( RC )   2010.6

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  • Two-dimensional bispectral analysis of drift wave turbulence in a cylindrical plasma Reviewed International journal

    Yamada, T.; Itoh, S. -I.; Inagaki, S.; Nagashima, Y.; Shinohara, S.; Kasuya, N.; Terasaka, K.; Kamataki, K.; Arakawa, H.; Yagi, M.; Fujisawa, A.; Itoh, K.

    PHYSICS OF PLASMAS   17.0 ( 5.0 )   2010.5

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    DOI: 10.1063/1.3429674

  • Statistical Analysis Technique for Estimation of Causal Relationship in Plasma Turbulence Reviewed International journal

    Kamataki, Kunihiro; Itoh, Kimitaka; Itoh, Sanae-I.; Fujsawa, Akihide; Inagaki, Shigeru; Nagashima, Yoshihiko; Yagi, Masatoshi; Yamada, Takuma

    JOURNAL OF NUCLEAR MATERIALS   79.0 ( 2.0 )   2010.2

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    DOI: 10.1143/JPSJ.79.024501

  • Observations of abrupt changes in the fluctuation spectrum on LMD-U Reviewed International journal

    Arakawa, H.; Kamataki, K.; Inagaki, S.; Maruta, T.; Nagashima, Y.; Yamada, T.; Shinohara, S.; Terasaka, K.; Sugita, S.; Yagi, M.; Kasuya, N.; Fujisawa, A.; Itoh, S-I; Itoh, K.

    PLASMA PHYSICS AND CONTROLLED FUSION   51.0 ( 8.0 )   2009.8

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    DOI: 10.1088/0741-3335/51/8/085001

  • Dynamics of Drift and Flute Modes in Linear Cylindrical ECR Plasma Reviewed International journal

    K. Kamataki, S.-I. Itoh, Y. Nagashima, S. Inagaki, S. Shinohara, M. Yagi, T. Yamada, Y. Kawai, A. Fujisawa, K. Itoh

    JOURNAL OF NUCLEAR MATERIALS   8.0   2009.8

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  • Measurement of Nonlinear Mode Couplings in the Large Mirror Device-Upgrade Reviewed International journal

    T. Yamada, S.-I. Itoh, S. Inagaki, Y. Nagashima, S. Shinohara, T. Maruta, K. Terasaka, K. Kamataki, N. Kasuya, M. Yagi, Y. Kawai, A. Fujisawa, K. Itoh

    JOURNAL OF NUCLEAR MATERIALS   2009.8

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  • Non-inductive plasma current start-up by EC and RF power in the TST-2 spherical tokamak Reviewed International journal

    A Ejiri, Y Takase, T Oosako, T Yamaguchi, Y Adachi, O Watanabe, Y Nagashima, BI An, H Kobayashi, H Kurashina, H Hayashi, H Matsuzawa, K Yamada, H Tojo, T Masuda, M Sasaki, R Kumazawa, H Kasahara, F Shimpo

    NUCLEAR FUSION   2009.6

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  • Phase Alignments between MHD Modes Followed by Minor Collapses on TST-2 Reviewed International journal

    Hiroshi TOJO, Akira EJIRI, Yuichi TAKASE, Yoshihiko NAGASHIMA, Osamu WATANABE, Yuuki ADACHI, Takuya OOSAKO, Takashi YAMAGUCHI, Byung Il AN, Hiroaki KOBAYASHI, Hiroki KURASHINA, Haduki MATSUZAWA, Kotaro YAMADA, Makoto SASAKI and Tetsuya MASUDA

    Plasma and Fusion Research   4.0 ( RA )   2009.5

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  • Geodesic Acoustic Mode Spectroscopy II Reviewed International journal

    Sanae-I. ITOH, Seiya NISHIMURA, Kimitaka ITOH, Akihide FUJISAWA, Yoshihiko NAGASHIMA and Shigeru INAGAKI

    Plasma and Fusion Research   4.0 ( RC )   2009.5

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  • Parametric decay instability during high harmonic fast wave heating experiments on the TST-2 spherical tokamak Reviewed International journal

    T. Oosako, Y. Takase, A. Ejiri, Yoshihiko Nagashima, et al.

    NUCLEAR FUSION   2009.5

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  • Nonlinear self-interaction of geodesic acoustic modes in toroidal plasmas Reviewed International journal

    M Sasaki, K Itoh, Y Nagashima, A Ejiri, Y Takase

    PHYSICS OF PLASMAS   16.0 ( 2.0 )   2009.2

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  • Anatomy of plasma turbulence Reviewed International journal

    Yamada, Takuma; Itoh, Sanae-I.; Maruta, Takashi; Kasuya, Naohiro; Nagashima, Yoshihiko; Shinohara, Shunjiro; Terasaka, Kenichiro; Yagi, Masatoshi; Inagaki, Shigeru; Kawai, Yoshinobu; Fujisawa, Akihide; Itoh, Kimitaka

    NATURE PHYSICS   4.0 ( 9.0 )   2008.9

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    DOI: 10.1038/nphys1029

  • Transport Dynamics and Multi-Scale Coupling of Turbulence in LHD Reviewed International journal

    Shigeru INAGAKI, Naoki TAMURA, Yoshihiko NAGASHIMA, Tokihiko TOKUZAWA, Takuma YAMADA, Katsumi IDA, Takashi MARUTA, Shin KUBO, Kenichi TERASAKA, Takashi SHIMOZUMA, Yoshio NAGAYAMA, Kazuo KAWAHATA, Akio KOMORI, Shunjiro SHINOHARA, Akihide FUJISAWA, Masatoshi YAGI, Yoshinobu KAWAI, Sanae-I. ITOH, Kimitaka ITOH and the LHD experimental group

    Plasma and Fusion Research   3.0 ( RA )   2008.8

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  • Observation of Zonal Flow Type Oscillation in Linear Cylindrical ECR Plasmas Reviewed International journal

    Kunihiro KAMATAKI, Sanae -I. ITOH, Yoshihiko NAGASHIMA, Shigeru INAGAKI, Shunjiro SHINOHARA, Masatoshi YAGI, Takuma YAMADA, Yoshinobu KAWAI, Akihide FUJISAWA and Kimitaka ITOH

    Plasma and Fusion Research   3.0 ( L )   2008.8

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  • Plasma Current Sustainment by RF Power in ECH Start-up Plasma in the TST-2 Spherical Tokamak Reviewed International journal

    Osamu WATANABE, Akira EJIRI, Takashi YAMAGUCHI, Junichi SUGIYAMA, Takuya OOSAKO, Yuuki ADACHI, Kotaro YAMADA, Hiroshi TOJO, Soichiro KAINAGA, Yuichi TAKASE, Yoshihiko NAGASHIMA, Makoto SASAKI and Tetsuya MASUDA

    Plasma and Fusion Research   3.0 ( RA )   2008.8

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  • Spatiotemporal Behavior of Drift Waves in LMD-U Reviewed International journal

    Takuma YAMADA, Sanae -I. ITOH, Kenichiro TERASAKA, Naohiro KASUYA, Yoshihiko NAGASHIMA, Shunjiro SHINOHARA, Takashi MARUTA, Masatoshi YAGI, Shigeru INAGAKI, Yoshinobu KAWAI, Akihide FUJISAWA and Kimitaka ITOH

    Plasma and Fusion Research   3.0 ( RA )   2008.8

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  • Experimental Study of Drift Wave Turbulence in Linear Plasmas Reviewed International journal

    Takuma YAMADA, Sanae -I. ITOH, Takashi MARUTA, Naohiro KASUYA, Shunjiro SHINOHARA, Yoshihiko NAGASHIMA, Masatoshi YAGI, Kenichiro TERASAKA, Shigeru INAGAKI, Yoshinobu KAWAI, Masayuki FUKAO, Akihide FUJISAWA and Kimitaka ITOH

    Plasma and Fusion Research   3.0 ( RA )   2008.7

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  • Experimental studies of zonal flow and field in compact helical system plasma Reviewed International journal

    Fujisawa, A.; Itoh, K.; Shimizu, A.; Nakano, H.; Ohshima, S.; Iguchi, H.; Matsuoka, K.; Okamura, S.; Minami, T.; Yoshimura, Y.; Nagaoka, K.; Ida, K.; Toi, K.; Takahashi, C.; Kojima, M.; Nishimura, S.; Isobe, M.; Suzuki, C.; Akiyama, T.; Ido, T.; Nagashima, Y.; Itoh, S. -I.; Diamond, P. H.

    PHYSICS OF PLASMAS   15.0 ( 5.0 )   2008.5

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    DOI: 10.1063/1.2889012

  • Investigation of competitive oscillations between drift mode and flute mode in linear cylindrical ECR plasma Reviewed International journal

    Kamataki, K.; Itoh, S-I; Nagashima, Y.; Inagaki, S.; Shinohara, S.; Yagi, M.; Yamada, T.; Kawai, Y.; Fujisawa, A.; Itoh, K.

    PLASMA PHYSICS AND CONTROLLED FUSION   50.0 ( 3.0 )   2008.3

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    DOI: 10.1088/0741-3335/50/3/035011

  • Radial transport characteristics of fast ions due to energetic-particle modes inside the last closed-flux surface in the compact helical system Reviewed International journal

    Nagaoka, Kenichi; Isobe, Mitsutaka; Toi, Kazuo; Shimizu, Akihiro; Fujisawa, Akihide; Ohshima, Shunsuke; Nakano, Haruhisa; Osakabe, Masaki; Todo, Yasushi; Akiyama, Tsuyoshi; Nagashima, Yoshihiko; Suzuki, Chihiro; Nishimura, Shin; Yoshimura, Yasuo; Matsuoka, Keisuke; Okamura, Shoichi

    PHYSICAL REVIEW LETTERS   100.0 ( 6.0 )   2008.2

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    DOI: 10.1103/PhysRevLett.100.065005

  • Fine positioning of a poloidal probe array Reviewed International journal

    Yamada, T.; Nagashima, Y.; Inagaki, S.; Kawai, Y.; Yagi, M.; Itoh, S. -I.; Maruta, T.; Shinohara, S.; Terasaka, K.; Kawaguchi, M.; Fukao, M.; Fujisawa, A.; Itoh, K.

    REVIEW OF SCIENTIFIC INSTRUMENTS   78.0 ( 12.0 )   2007.12

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    DOI: 10.1063/1.2818796

  • Detection of Cascading in Drift Wave Turbulence Using Probe Array in Linear Plasmas Reviewed International journal

    Takuma YAMADA, -Sanae -I. ITOH, Takashi MARUTA, Shunjiro SHINOHARA, Naohiro KASUYA, Yoshihiko NAGASHIMA, Masatoshi YAGI, Kenichiro TERASAKA, Masato KAWAGUCHI, Shigeru INAGAKI, Yoshinobu KAWAI, Masayuki FUKAO, Akihide FUJISAWA and Kimitaka ITOH

    Plasma and Fusion Research   2.0 ( RC )   2007.12

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  • A Study on Low-Frequency Fluctuations Using New Azimuthal Probe Array in High-Density Helicon Linear Plasma Reviewed International journal

    Kenichiro TERASAKA, Shunjiro SHINOHARA , Yoshihiko NAGASHIMA, Takuma YAMADA, Masato KAWAGUCHI, Takashi MARUTA, Shigeru INAGAKI, Yoshinobu KAWAI, Naohiro KASUYA, Masatoshi YAGI, Akihide FUJISAWA, Kimitaka ITOH and Sanae-I. ITOH

    Plasma and Fusion Research   2.0 ( RC )   2007.11

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  • Experimental progress on zonal flow physics in toroidal plasmas Reviewed International journal

    Fujisawa, A.; Ido, T.; Shimizu, A.; Okamura, S.; Matsuoka, K.; Iguchi, H.; Hamada, Y.; Nakano, H.; Ohshima, S.; Itoh, K.; Hoshino, K.; Shinohara, K.; Miura, Y.; Nagashima, Y.; Itoh, S.-I.; Shats, M.; Xia, H.; Dong, J. Q.; Yan, L. W.; Zhao, K. J.; Conway, G. D.; Stroth, U.; Melnikov, A. V.; Eliseev, L. G.; Lysenko, S. E.; Perfilov, S. V.; Hidalgo, C.; Tynan, G. R.; Holland, C.; Diamond, P. H.; Mckee, G. R.; Fonck, R. J.; Gupta, D. K.; Schoch, P. M.

    NUCLEAR FUSION   47.0 ( 10.0 )   2007.10

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    DOI: 10.1088/0029-5515/47/10/S19

  • Geodesic acoustic mode spectroscopy Reviewed International journal

    Itoh, S-I; Itoh, K.; Sasaki, M.; Fujisawa, A.; Id, T.; Nagashima, Y.

    PLASMA PHYSICS AND CONTROLLED FUSION   49.0 ( 8.0 )   2007.8

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    DOI: 10.1088/0741-3335/49/8/L01

  • Reduction effect of neutral density on the excitation of turbulent drift waves in a linear magnetized plasma with flow Reviewed International journal

    Saitou, Y.; Yonesu, A.; Shinohara, S.; Ignatenko, M. V.; Kasuya, N.; Kawaguchi, M.; Terasaka, K.; Nishijima, T.; Nagashima, Y.; Kawai, Y.; Yagi, M.; Itoh, S.-I.; Azumi, M.; Itoh, K.

    PHYSICS OF PLASMAS   14.0 ( 7.0 )   2007.7

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    DOI: 10.1063/1.2743030

  • Observation of Competition between Drift Instability and Flute Instability in a Bounded Linear ECR Plasma Reviewed International journal

    Kunihiro KAMATAKI, Yoshihiko NAGASHIMA, Shunjiro SHINOHARA, Yoshinobu KAWAI, Sigeru INAGAKI, Masatoshi YAGI, Kimitaka ITOH and Sanae-I. ITOH

    Plasma and Fusion Research   2.0 ( RC )   2007.7

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  • Coexistence of collisional drift and flute wave instabilities in bounded linear ECR plasma Reviewed International journal

    Kamataki, Kunihiro; Nagashima, Yoshihiko; Shinohara, Shunjiro; Kawai, Yoshinobu; Yagi, Masatoshi; Itoh, Kimitaka; Itoh, Sanae-I.

    JOURNAL OF NUCLEAR MATERIALS   76.0 ( 5.0 )   2007.5

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    DOI: 10.1143/JPSJ.76.054501

  • Experimental evidence of a zonal magnetic field in a toroidal plasma Reviewed International journal

    Fujisawa, A.; Itoh, K.; Shimizu, A.; Nakano, H.; Ohshima, S.; Iguchi, H.; Matsuoka, K.; Okamura, S.; Minami, T.; Yoshimura, Y.; Nagaoka, K.; Ida, K.; Toi, K.; Takahashi, C.; Kojima, M.; Nishimura, S.; Isobe, M.; Suzuki, C.; Akiyama, T.; Nagashima, Y.; Itoh, S.-I.; Diamond, P. H.

    PHYSICAL REVIEW LETTERS   98.0 ( 16.0 )   2007.4

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    DOI: 10.1103/PhysRevLett.98.165001

  • Intermittent characteristics in coupling between turbulence and zonal flows Reviewed International journal

    Fujisawa, A.; Shimizu, A.; Nakano, H.; Ohshima, S.; Itoh, K.; Nagashima, Y.; Itoh, S. -I; Iguchi, H.; Yoshimura, Y.; Minami, T.; Nagaoka, K.; Takahashi, C.; Kojima, M.; Nishimura, S.; Isobe, M.; Suzuki, C.; Akiyama, T.; Ido, T.; Matsuoka, K.; Okamura, S.; Diamond, P. H.

    PLASMA PHYSICS AND CONTROLLED FUSION   49.0 ( 3.0 )   2007.3

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    DOI: 10.1088/0741-3335/49/3/002

  • Causal relationship between zonal flow and turbulence in a toroidal plasma Reviewed International journal

    Fujisawa, Akihide; Shimizu, Akihiro; Nakano, Haruhisa; Ohshima, Shinsuke; Itoh, Kimitaka; Nagashima, Yoshihiko; Itoh, Sanae-I.; Iguchi, Harukazu; Yoshimura, Yasuo; Minami, Takashi; Nagaoka, Keiichi; Takahashi, Chihiro; Kojima, Mamoru; Nishimura, Shin; Isobe, Mitsutaka; Suzuki, Chihiro; Akiyama, Tsuyoshi; Ido, Takeshi; Matsuoka, Keisuke; Okamura, Shoichi; Diamond, Patrick H.

    JOURNAL OF NUCLEAR MATERIALS   76.0 ( 3.0 )   2007.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1143/JPSJ.76.033501

  • Compatibility of reduced activation ferritic steel wall with high performance plasma on JFT-2M Reviewed International journal

    Tsuzuki, K.; Kamiya, K.; Shinohara, K.; Bakhtiari, M.; Ogawa, H.; Kurita, G.; Takechi, M.; Kasai, S.; Sato, M.; Sato, M.; Kawashima, H.; Uehara, K.; Hoshino, K.; Kusama, Y.; Yamamoto, M.; Shibata, T.; Kikuchi, K.; Amemiya, H.; Sadamoto, Y.; Nagashima, Y.; Ejiri, A.; Hino, T.; Hirohata, Y.; Tsutsui, H.; Shimada, R.; Ido, T.; Hamada, Y.

    NUCLEAR FUSION   46.0 ( 11.0 )   2006.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0029-5515/46/11/010

  • Geodesic Acoustic Eigenmodes Reviewed International journal

    Kimitaka ITOH, Sanae-I. ITOH, Patrick H. DIAMOND, Akihide FUJISAWA, Masatoshi YAGI, Tetsuo WATARI, Yoshihiko NAGASHIMA and Atsushi FUKUYAMA

    Plasma and Fusion Research   1.0 ( RC )   2006.7

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  • Direct identification of magnetic surface by a differential double probe in JFT-2M Reviewed International journal

    Uehara, K.; Tsuzuki, K.; Amemiya, H.; Nagashima, Y.; Hoshino, K.; Sadamoto, Y.

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS   45.0 ( 24.0 )   2006.7

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    DOI: 10.1143/JJAP.45.L630

  • Physics of zonal flows Reviewed International journal

    Itoh, K; Itoh, SI; Diamond, PH; Hahm, TS; Fujisawa, A; Tynan, GR; Yagi, M; Nagashima, Y

    PHYSICS OF PLASMAS   13.0 ( 5.0 )   2006.5

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    DOI: 10.1063/1.2178779

  • Observation of the interaction between the geodesic acoustic mode and ambient fluctuation in the JFT-2M tokamak Reviewed International journal

    T Ido, Y Miura, K Hoshino, K Kamiya, Y Hamada, A Nishizawa, Y Kawasumi, H Ogawa, Y Nagashima, K Shinohara, Y Kusama

    NUCLEAR FUSION   2006.5

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  • Turbulence and transport characteristics of a barrier in a toroidal plasma Reviewed International journal

    Fujisawa, A; Shimizu, A; Nakano, H; Ohsima, S; Itoh, K; Iguchi, H; Yoshimura, Y; Minami, T; Nagaoka, K; Takahashi, C; Kojima, M; Nishimura, S; Isobe, M; Suzuki, C; Akiyama, T; Nagashima, Y; Ida, K; Toi, K; Ido, T; Itoh, SI; Matsuoka, K; Okamura, S; Diamond, PH

    PLASMA PHYSICS AND CONTROLLED FUSION   48.0 ( 4.0 )   2006.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0741-3335/48/4/S15

  • Study of SOL/divertor plasmas in JFT-2M Reviewed International journal

    Kawashima, H; Sengoku, S; Uehara, K; Tamai, H; Shoji, T; Ogawa, H; Shibata, T; Yamamoto, M; Miura, Y; Kusama, Y; Kimura, H; Amemiya, H; Sadamoto, Y; Nagashima, Y

    FUSION SCIENCE AND TECHNOLOGY   49.0 ( 2.0 )   2006.2

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    DOI: 0.0

  • Plasma diagnostics in JFT-2M Reviewed International journal

    Kasai, S; Kamiya, K; Shinohara, K; Kawashima, H; Ogawa, H; Uehara, K; Miura, Y; Okano, F; Suzuki, S; Hoshino, K; Tsuzuki, K; Sato, M; Oasa, K; Kusama, Y; Yamauchi, T; Nagashima, Y; Ida, K; Hidekuma, S; Ido, T; Hamada, Y; Nishizawa, A; Kawasumi, Y; Uesugi, Y; Okajima, S; Kawahata, K; Ejiri, A; Amemiya, H; Sadamoto, Y

    FUSION SCIENCE AND TECHNOLOGY   49.0 ( 2.0 )   2006.2

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    DOI: 0.0

  • Studies of radial electric field formation and its effect on fluctuations and transport barriers in the JFT-2M tokamak Reviewed International journal

    Ida, K; Miura, Y; Ido, T; Nagashima, Y; Shinohara, K

    FUSION SCIENCE AND TECHNOLOGY   49.0 ( 2.0 )   2006.2

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    DOI: 0.0

  • On the bicoherence analysis of plasma turbulence Reviewed International journal

    Itoh, K; Nagashima, Y; Itoh, SI; Diamond, PH; Fujisawa, A; Yagi, M; Fukuyama, A

    PHYSICS OF PLASMAS   12.0 ( 10.0 )   2005.10

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    DOI: 10.1063/1.2062627

  • High performance tokamak experiments with a ferritic steel wall on JFT-2M Reviewed International journal

    Kazuhiro Tsuzuki, H Kimura, H Kawashima, M Sato, K Kamiya, K Shinohara, H Ogawa, K Hoshino, M Bakhtiari, S Kasai, K Uehara, H Sasao, Y Kusama, N Isei, Y Miura, T Ogawa, M Yamamoto, T Shibata, K Kikuchi, K Miyachi, T Ito, H Ajikawa, S Nomura, H Tsutsui, R Shimada, T Ido, Y Hamada, N Fukumoto, M Nagata, T Uyama, H Niimi, S Yatsu, N Kayukawa, T Hino, Y Hirohata, Y Nagashima, A Ejiri, A Amemiya, Y Sadamoto, A Tsushima

    NUCLEAR FUSION   2003.10

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  • Ion temperature increase during MHD events on the TST-2 spherical tokamak Reviewed International journal

    A Ejiri, S Shiraiwa, Y Takase, T Yamada, Y Nagashima, H Kasahara, D Iijima, Y Kobori, T Nishi, T Taniguchi, M Aramasu, S Ohara, M Ushigome, K Yamagishi

    NUCLEAR FUSION   43.0 ( 7.0 )   2003.7

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  • Initial results from the TST-2 spherical tokamak Reviewed International journal

    Y. Takase, A. Ejiri, N. Kasuya, T. Mashiko, S. Shiraiwa, L. M. Tozawa, T. Akiduki, H. Kasahara, Y. Nagashima, H. Nozato, H. Wada, H. Yamada, T. Yamada and K. Yamagishi

    NUCLEAR FUSION   41.0 ( 11.0 )   2001.11

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Presentations

  • Investigation of Essential Nonlinear Processes in Plasma Turbulence Invited International conference

    European Physical Society Conference on Plasma Physics  2013.7 

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    Event date: 2013.7

    Presentation type:Oral presentation (general)  

    Country:Finland  

  • Progress towards understanding of dynamical interactions between global fields and turbulence nonlinear force in laboratory plasmas Invited International conference

    Nagashima Yoshihiko, et al.

    Workshop on Electric Fields, Turbulence and Self-Organisation in Magnetized Plasmas  2012.7 

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    Event date: 2012.7

    Presentation type:Oral presentation (general)  

    Country:Sweden  

  • Global measurement of Reynolds stress in cylindrical linear plasmas International conference

    Nagashima Yoshihiko, et al.

    39th European Physical Society Conference on Plasma Physics, 16th International Congress on Plasma Physics  2012.7 

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    Event date: 2012.7

    Presentation type:Oral presentation (general)  

    Country:Sweden  

  • Non-Gaussian properties of global particle and momentum fluxes driven by turbulence in a linear plasma International conference

    Nagashima Yoshihiko, et al.

    53rd Annual Meeting of the APS Division of Plasma Physics  2011.11 

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    Event date: 2011.11

    Presentation type:Oral presentation (general)  

    Country:United States  

  • Dynamics of global transport and turbulence noise force - an experimental analysis on plasma turbulence International conference

    Y. Nagashima, S. -I. Itoh, S. Inagaki, H. Arakawa, N. Kasuya, A. Fujisawa, K. Kamataki, T. Yamada, S. Shinohara, S. Oldenbrger, M. Yagi, Y. Takase, P. H. Diamond, and K. Itoh

    Northeastern Asian Symposium 2011  2011.9 

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    Event date: 2011.9

    Presentation type:Oral presentation (general)  

    Country:Korea, Republic of  

  • 2波⻑発光強度トモグラフィーから計測された規格化電子温度・電子密度揺動

    永島芳彦,藤澤彰英,山崎広太郎,稲垣滋,文贊鎬,金史良,河内裕一,荒川弘之,山田琢磨,小林達哉,糟谷直宏,小菅佑輔,佐々木真,井戸毅

    第39回プラズマ・核融合学会 年会  2022.11 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山国際会議場   Country:Japan  

  • 発光信号トモグラフィーによる規格化電子温度・電子密度揺動推定

    永島芳彦,藤澤彰英,山崎広太郎,稲垣滋,文贊鎬,金史良,河内裕一,荒川弘之,山田琢磨,小林達哉,糟谷直宏,小菅佑輔,佐々木真,井戸毅

    2022年度日本物理学会秋季大会  2022.9 

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京工業大学   Country:Japan  

  • Radial Correlation Analysis on Edge Plasma Turbulence in a Toroidal Plasma and Its Dependence on Plasma Configuration International conference

    Y. Nagashima, S. Ohshima, A. Miyashita, S. Inagaki, and A. Fujisawa

    The 13th International Symposium of Advenced Energy Science  2022.9 

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • QUEST定常トカマク放電におけるプローブシステムを用いたSOL計測の初期結果

    永島芳彦, 花田和明, 小島信一郎, Hatem O ELSerafy, 図子秀樹, 長谷川真, 中村一男, 出射浩, 藤澤彰英, 江尻晶, 高瀬雄一, 井戸毅, 黒田賢剛, 恩地拓己, 池添竜也, 岳其霖E, 四竈泰一, Arseniy Kuzmin, 川崎昌二, 永田貴大, 東島亜紀

    日本物理学会 第77回年次大会(2022年)  2022.3 

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  • Development of an electrode system for edge/scrape-off layer measurements during steady state tokamak operations in QUEST International conference

    Yoshihiko NAGASHIMA, Kazuaki HANADA, Shinichiro KOJIMA, Hatem O ELSerafy, Hideki ZUSHI, Kazuo NAKAMURA, Makoto HASEGAWA, Hiroshi IDEI, Akihide FUJISAWA, Akira EJIRI, Yuichi TAKASE, Takeshi IDO, Kengo KURODA, Takumi ONCHI, Ryuya IKEZOE, Shoji KAWASAKI, Takahiro NAGATA, and Aki HIGASHIJIMA

    The 29th International Toki Conference on Plasma and Fusion Research  2020.10 

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    Event date: 2020.10

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Statistical analysis on edge turbulence fluctuation data in Heliotron-J (ZE2020-C14) International conference

    Yoshihiko Nagashima, Shinsuke Ohshima, Shigeru Inagaki, and Akihide Fujisawa

    The 11th International Symposium of Advanced Energy Science  2020.9 

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    Event date: 2020.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • PANTAにおける発光トモグラフィー揺動の電子温度揺動依存性

    永島芳彦,藤澤彰英,山崎広太郎,稲垣滋,文贊鎬, 金史良,河内裕一,荒川弘之,山田琢磨,小林達也, 糟谷直宏,小菅佑輔,佐々木真,井戸毅

    日本物理学会2020年秋季大会  2020.9 

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン開催   Country:Japan  

  • PANTA 直線プラズマにおけるトモグラフィーとプローブ間信号比較

    永島芳彦, 藤澤彰英, 山崎広太郎, 文贊鎬, 稲垣滋,他

    日本物理学会第75回年次大会  2020.3 

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    Event date: 2020.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学(現地開催中止)   Country:Japan  

  • 乱流プラズマ統合観測システム PLATO の 2019 年度までの進捗について Invited

    永島芳彦

    平衡再構成のための計測技術と解析手法 研究会  2020.2 

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    Event date: 2020.2

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:核融合科学研究所   Country:Japan  

  • PANTA におけるトモグラフィーとプローブ間の乱流データ比較の試み

    永島芳彦, 藤澤彰英, 山崎広太郎, 文贊鎬, 稲垣滋, 他

    プラズマ・核融合学会第36回年会  2019.12 

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    Event date: 2019.11 - 2019.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:中部大学春日井キャンパス   Country:Japan  

  • PLATO における多チャンネルプローブ計測

    永島芳彦, 藤澤彰英, 山崎広太郎, 文贊鎬, 稲垣滋, 井戸毅, 山田琢磨

    日本物理学会2019年秋季大会  2019.9 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:岐阜大学   Country:Japan  

  • Statistical analysis on edge turbulence fluctuation data in Heliotron-J (ZE31-C07) International conference

    Yoshihiko Nagashima, Shinsuke Ohshima, Shigeru Inagaki, and Akihide Fujisawa

    The 10th International Symposium of Advanced Energy Science  2019.9 

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    Event date: 2019.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Statistical analysis on edge turbulence fluctuation data in Heliotron-J International conference

    Yoshihiko Nagashima, Shinsuke Ohshima, Shigeru Inagaki, and Akihide Fujisawa

    The 9th International Symposium of Advanced Energy Science  2018.9 

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    Event date: 2018.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • プラズマ乱流における乱流ー帯状流系観測と今後の乱流研究について Invited

    永島芳彦

    伊藤公孝先生御退職記念 フロントランナーシンポジウム  2018.1 

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    Event date: 2018.1

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:核融合科学研究所、岐阜県土岐市   Country:Japan  

  • Impact of end-plate biasing on fluctuation Reynolds stress in PANTA International conference

    Y. Nagashima, et al.

    16th International Workshop on H-mode Physics and Transport Barriers  2017.9 

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    Event date: 2017.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Russian Federation  

    Other Link: http://onlinereg.ru/hmws2017

  • Impact of end-plate biasing on plasma fluctuations in PANTA International conference

    Y. Nagashima, et al.

    Asia-Pacific Transport Working Goup  2017.6 

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    Event date: 2017.6

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

    Other Link: http://www.p.phys.nagoya-u.ac.jp/APTWG2017/index.html

  • 直線プラズマ装置PANTAにおける乱流トモグラフィーの進展

    永島 芳彦, 他

    日本物理学会第71回年次大会  2016.3 

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    Event date: 2016.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東北学院大学泉キャンパス   Country:Japan  

  • 直線プラズマの確率的遷移現象におけるスペクトル解析

    永島 芳彦, 他

    日本物理学会第70回年次大会  2015.3 

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    Event date: 2015.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:早稲田大学早稲田キャンパス   Country:Japan  

  • 非平衡極限 - 直線プラズマにおける乱流遷移の確率過程の観測

    永島芳彦他

    2014.11 

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    Event date: 2014.11

    Presentation type:Oral presentation (general)  

    Venue:朱鷺メッセ、新潟   Country:Japan  

  • Comparison between fluctuation data measured with multi-channel spectroscopic system and that measured with Langmuir probe in PANTA International conference

    Y. Nagashima, et al.

    24th International Toki Conference (ITC-24)  2014.11 

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    Event date: 2014.11

    Presentation type:Oral presentation (general)  

    Country:Japan  

  • Development of a radially-arranged multi-channel probe system in PANTA International conference

    Y. Nagashima, et al.

    4th APTWG International Workshop  2014.6 

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    Event date: 2014.6

    Presentation type:Oral presentation (general)  

    Country:Japan  

  • 空間積分データを用いた条件付き仕分けによる乱流実験解析

    永島 芳彦

    日本物理学会  2014.3 

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    Event date: 2014.3

    Presentation type:Oral presentation (general)  

    Venue:東海大学湘南キャンパス   Country:Japan  

  • Nonlinear Force in Drift-Wave Turbulence in Linear Plasmas

    2013.12 

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    Event date: 2013.12

    Presentation type:Oral presentation (general)  

    Country:Japan  

  • Progress towards understanding of dynamical interactions between global fields and turbulence nonlinear force in laboratory plasmas

    Nagashima Yoshihiko, et al.

    2012.12 

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    Event date: 2012.12

    Presentation type:Oral presentation (general)  

    Country:Japan  

  • Recent results from the QUEST spherical tokamak International conference

    Nagashima Yoshihiko, et al.

    Workshop Scientific basis and roadmap towards a neutron-source based on the spherical tokamak concept  2012.11 

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    Event date: 2012.11

    Presentation type:Oral presentation (general)  

    Country:Russian Federation  

  • Observation of nonlinear phenomena of edge fluctuations in the TST-2 spherical tokamak International conference

    Nagashima Yoshihiko, et al.

    APS Annual meeting 2012  2012.10 

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    Event date: 2012.10 - 2012.11

    Presentation type:Oral presentation (general)  

    Country:United States  

  • Development of a novel Reynolds stress probe array with high spatial resolution in PANTA

    Nagashima Yoshihiko, et al.

    Autumn Meeting of the Physical Society of Japan, 2012  2012.9 

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    Event date: 2012.9

    Presentation type:Oral presentation (general)  

    Country:Japan  

  • Effect of end plate bias on turbulence momentum flux in PANTA

    Nagashima Yoshihiko, et al.

    67th Annual Meeting of the Physical Society of Japan  2012.3 

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    Event date: 2012.3

    Country:Japan  

  • Envelope analysis of turbulence Invited International conference

    Nagashima Yoshihiko, et al.

    2012.3 

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    Event date: 2012.3

    Country:Japan  

  • LMD-U直線プラズマにおけるレイノルズ応力と波面形状

    永島 芳彦, et al.

    燃焼プラズマでの輸送特性の理解と予測の高精度化に向けたトロイダルプラズマの閉じ込め・輸送に関する体系的研究」及び「閉じ込め・輸送サブクラスター会合」合同研究会プログラム  2012.1 

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    Event date: 2012.1

    Presentation type:Oral presentation (general)  

    Venue:NIFS、土岐   Country:Japan  

  • Dynamics of global transport and turbulence noise force - an experimental analysis on plasma turbulence

    Nagashima Yoshihiko, et al.

    Plasma Conference 2011  2011.11 

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    Event date: 2011.11

    Presentation type:Symposium, workshop panel (public)  

    Country:Japan  

  • Comment on the convergence of data analysis on correlation reflectometry International conference

    Nagashima Yoshihiko, et al.

    Intenational workshop on correlation analysis of micro-wave reflectometry  2011.10 

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    Event date: 2011.10

    Presentation type:Oral presentation (general)  

    Country:Japan  

▼display all

MISC

  • 講座 プラズマ実験におけるノイズ対策の基礎 6 6.ノイズと統計処理 Reviewed

    永島芳彦,稲垣滋

    プラズマ・核融合学会誌 第 96 巻第 1 号 12 pages (2020)   2020.1

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  • 球状トカマク研究の進展 -核融合エネルギー開発に向けて- 2.5球状トカマク改善閉じ込めプラズマにおける乱流揺動研究

    永島 芳彦

    プラズマ・核融合学会   2012.12

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    Language:Japanese  

  • 乱流中の非線形エネルギー流の観測

    永島芳彦、荒川弘之

    プラズマ・核融合学会誌   2012.6

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    Language:Japanese  

Professional Memberships

  • The Institute of Electrical Engineers of Japan

  • The Japan Society of Plasma Science and Nuclear Fusion Research

  • The Physical Society of Japan

  • American Physical Society

Academic Activities

  • Screening of academic papers

    Role(s): Peer review

    2023

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    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:6

  • Screening of academic papers

    Role(s): Peer review

    2022

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    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:9

  • Screening of academic papers

    Role(s): Peer review

    2021

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    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:7

  • Plasma and Fusion Research Journal

    2020.11 - 2021.10

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    Type:Academic society, research group, etc. 

  • Screening of academic papers

    Role(s): Peer review

    2020

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    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:6

  • Screening of academic papers

    Role(s): Peer review

    2019

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    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:2

  • Screening of academic papers

    Role(s): Peer review

    2018

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    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:4

    Proceedings of International Conference Number of peer-reviewed papers:2

  • Local Organizer Committee International contribution

    14th International Workshop on H-mode Physics and Transport Barriers  ( Kyushu University Japan ) 2013.10

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    Type:Competition, symposium, etc. 

  • 座長(Chairmanship)

    日本物理学会第67回年次大会  ( 関西学院大学 西宮上ヶ原キャンパス ) 2012.3

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    Type:Competition, symposium, etc. 

  • 座長(Chairmanship)

    プラズマ科学のフロンティア2010  ( 自然科学研究機構 核融合科学研究所 管理棟4F大会議室 ) 2011.9

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    Type:Competition, symposium, etc. 

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Other

  • Study on direct measurement of mechanism behind zonal flow generation using nonlinear analysis on plasma turbulence

    2012.4

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    磁場閉じ込めプラズマ研究では、微視的揺らぎの集合とする従来のプラズマ乱流の描像に代わり微視的揺らぎと帯状流の共存系とする新しい描像が提唱されていた。その実証は、国際熱核融合実験炉の性能予測にも関わる重要な問題として、世界的に希求されていた。本研究では、乱流プラズマにおいて、新たな非線形解析法を導入し統計精度を追求することで、微視的揺らぎと帯状流との結合を実験的に定量化することに成功、上記の新しい描像の実証に大きく貢献した。本研究を端緒とし、乱流輸送の局所的性質と大域的性質の相違を明確に実証する等、プラズマ乱流実験の新たな領域が世界的に開拓され続けている。本研究成果は、プラズマ物理学として学術的価値も極めて高く、次世代エネルギー源の一つである核融合炉心プラズマ設計に関わる科学的基盤の信頼性を格段に高めると期待される。

  • Study of causal relationship between formation process of plasma flow and global momentum transport driven by turbulence

    2011.12

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    本研究業績は、研究助成申請の受理である。申請者は、これまでの研究で、プラズマ乱流とプラズマ流(GAM)との間の結合および両者間のエネルギーの流れについて世界的に新しい知見を与えてきた。本研究では、これまでの研究を更に進め、乱流によるプラズマ流の駆動機構、および乱流が同時に駆動する粒子束などとの動的関係をより広範に観測し、核融合プラズマでの流れの制御のための物理機構を明らかして核融合研究に資するものである。

Research Projects

  • QUEST SOLの勾配長と揺動・波動強度分布の高温壁温度依存性の探査(継続)

    2024

    核融合科学研究所 双方向共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • トロイダルプラズマ周辺乱流の径方向相関解析と配位間比較(継続)

    2024

    京都大学 ゼロ・エミッション共同利用 共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • QUEST SOLの勾配長と揺動・波動強度分布の高温壁温度依存性の探査(継続)

    2023

    核融合科学研究所 双方向共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • トロイダルプラズマ周辺乱流の径方向相関解析と配位間比較(継続)

    2023

    京都大学 ゼロ・エミッション共同利用 共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • 高温電子が存在する定常トカマクスクレイプオフ層の勾配長及び乱流計測

    Grant number:22K03576  2022 - 2024

    日本学術振興会  科学研究費助成事業  基盤研究(C)

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • QUEST SOLの勾配長と揺動・波動強度分布の高温壁温度依存性の探査(新規)

    2022

    核融合科学研究所 双方向共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • トロイダルプラズマ周辺乱流の径方向相関解析と配位間比較(新規)

    2022

    京都大学 ゼロ・エミッション共同利用 共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • 直線プラズマにおけるトモグラフィー揺動データと静電プローブ揺動データの比較(新規)

    2022

    核融合科学研究所 一般共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • ダイバータ熱負荷軽減を目指した乱流輸送の定量的研究

    Grant number:21H01066  2021 - 2025

    日本学術振興会  科学研究費助成事業  基盤研究(B)

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    Authorship:Coinvestigator(s)  Grant type:Scientific research funding

  • バイアス電極を用いたQUESTのSOLプラズマ研究(継続)

    2021

    核融合科学研究所 双方向共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • トロイダルプラズマ周辺乱流揺動の統計解析(継続)

    2021

    京都大学 ゼロ・エミッション共同利用 共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • トロイダルプラズマ周辺乱流揺動の統計解析(継続)

    2020

    京都大学 ゼロ・エミッション共同利用 共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • バイアス電極を用いたQUESTのSOLプラズマ研究(継続)

    2020

    核融合科学研究所 双方向共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • バイアス電極を用いたQUESTのSOLプラズマ研究(継続)

    2019

    核融合科学研究所 双方向型共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • トロイダルプラズマ周辺乱流揺動の統計解析(継続)

    2019

    京都大学ゼロエミッション共同利用・共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • バイアス電極を用いたQUESTのSOLプラズマ研究

    2018

    核融合科学研究所 双方向型共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • トロイダルプラズマ周辺乱流揺動の統計解析(継続)

    2018

    京都大学ゼロエミッション共同利用・共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • 統合観測システムで解き明かす乱流プラズマの構造形成原理と機能発現機構

    2017.4 - 2023.3

    九州大学(国内) 

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid) 

  • 電圧バイアス実験時におけるダイバータープローブ検出回路の最適化

    2017

    核融合科学研究所双方向共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • トロイダルプラズマ周辺乱流揺動の統計解析(継続)

    2017

    京都大学ゼロエミッション共同利用・共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • トロイダルプラズマ周辺乱流揺動の統計解析(継続)

    2016

    京都大学ゼロエミッション共同利用・共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • バルク電子の高速捕集に対するプラズマからの電子補給の時間応答に関する研究:バイアス電極開発(継続)

    2016

    核融合科学研究所双方向共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • トロイダルプラズマ周辺乱流揺動の統計解析

    2015

    京都大学ゼロエミッション共同利用・共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • バルク電子の高速捕集に対するプラズマからの電子補給の時間応答に関する研究:バイアス電極開発(継続)

    2015

    核融合科学研究所双方向共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • 条件付き平滑化によるプラズマ乱流の大偏差統計解析

    2014.4 - 2017.3

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    Authorship:Principal investigator 

    乱流プラズマにおいて、大域的構造と局所乱流の時間発展を高速で取得し、大気的構造の確率密度関数で条件付き平滑化した乱流統計量を求める解析手法を開発することを目的とする。

  • 条件付き平滑化によるプラズマ乱流の大偏差統計解析

    Grant number:26420852  2014 - 2016

    日本学術振興会  科学研究費助成事業  基盤研究(C)

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • バルク電子の高速捕集に対するプラズマからの電子補給の時間応答に関する研究:バイアス電極開発(継続)

    2014

    核融合科学研究所双方向共同研究

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    Authorship:Principal investigator  Grant type:Contract research

  • 多階層複雑・開放系における粒子循環の物理とマクロ制御

    2013.3

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    Authorship:Coinvestigator(s) 

  • バルク電子の高速捕集に対するプラズマからの電子補給の時間応答に関する研究:バイアス電極開発

    2013

    核融合科学研究所 双方向型共同研究(NIFS13KUTR095)

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    Authorship:Principal investigator  Grant type:Contract research

  • 高速電子捕集に対するプラズマからの電子補給の時間応答に関する研究

    2012.4 - 2015.3

    核融合科学研究所(日本) 

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    Authorship:Principal investigator 

  • 多階層複雑・開放系における粒子循環の物理とマクロ制御

    Grant number:24226020  2012 - 2016

    日本学術振興会  科学研究費助成事業  基盤研究(S)

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    Authorship:Coinvestigator(s)  Grant type:Scientific research funding

  • 高速電子捕集に対するプラズマからの電子補給の時間応答に関する研究Ⅰ:初期実験

    2012

    核融合科学研究所 双方向型共同研究(NIFS12KUTR083)

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    Authorship:Principal investigator  Grant type:Contract research

  • トカマクプラズマにおける乱流非線形エネルギー移送の空間非対称性の研究

    2011.4 - 2014.12

    日本学術振興会(日本) 

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    Authorship:Principal investigator 

  • 2次元乱流ダイナミクス観測のための多波長超多点観測法の開発

    2011.4 - 2014.3

    九州大学(日本) 

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid) 

  • トカマクプラズマにおける乱流非線形エネルギー移送の空間非対称性の研究

    Grant number:23360409  2011 - 2014

    日本学術振興会  科学研究費助成事業  基盤研究(B)

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • 2次元乱流ダイナミクス観測のための多波長超多点観測法の開発

    Grant number:23246162  2011 - 2013

    日本学術振興会  科学研究費助成事業  基盤研究(A)

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid)  Grant type:Scientific research funding

  • 日本原子力研究開発機構研究助成金/乱流による大域的な輸送現象とプラズマ流の形成過程との因果関係に関する研究

    2011

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    Grant type:Donation

  • 極限プラズマ研究連携センタープロジェクト

    2009.4 - 2014.5

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    Authorship:Coinvestigator(s) 

    (http://ircpt.riam.kyushu-u.ac.jp/overview/index.htmlより抜粋)プラズマは自然界のいたるところに見られる物質の状態です。ミクロのサイズから宇宙の銀河に渡るまで広いスケールの現象と関わっており、 太陽、オーロラ、雷など自然界に見られる様々な構造および現象の理解には不可欠です。また、プラズマはその応用としても多様であり、 その非平衡の極限的な状態を利用し磁場閉じこめ核融合やカーボンナノチューブやスーパーダイアモンドなど機能性物質の創成、 最近では医療にも応用される興味深い研究対象です。プラズマ物理学は自然の理解や現代および将来の技術を支える科学です。

    伊藤極限プラズマ研究連携センターは九州大学の主幹センターとして2009年10月1日に九州大学より認められ発足しました。 日本学術振興会科学研究費補助金「乱流プラズマの動的応答と動的輸送の総合研究」(2009-2013)によるプロジェクトと連携し、 プラズマの研究を通して現代物理学の新しい領域を開拓しております。特に本センターでは、プラズマ乱流について理論・シミュレーション・実験の統合的な 方法により押し進めています。また、そこで得られたプラズマの物理を、プラズマを活用したエネルギー開発や機能物質創成に活かすべく 国内外の研究協力を積極的に進めています。

    プラズマ科学は、これまで核融合プラズマ・高エネルギー密度プラズマ・プロセスプラズマ・ナノ-バイオプラズマなど対象に個別に発展してきました。 本センターでは、個々のプラズマ物理科学の方法論を、非平衡極限プラズマという共通学理から連携しネットワーク化を推進する事で普遍的な学理を探求し 研究を加速することを目的に、大規模計画「非平衡極限プラズマ全国共同連携ネットワーク研究計画」を提案し科学技術のフロンティアを牽引しています。 また、従来行ってきたプラズマ科学の双方向国際教育を一層高度化すること、及び九州大学が「国際キャリアパス」となることに寄与したいと考えております。

  • 乱流プラズマの動的応答と動的輸送の総合研究

    2009.4 - 2014.3

    九州大学(日本) 

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    Authorship:Coinvestigator(s) 

    国際熱核融合実験炉(ITER)における核燃焼プラズマの実現に向けて、プラズマの高性能化と制御を目指しプラズマ乱流と構造の詳細研究が世界中で活発に行われている。近年の研究により、帯状流やストリーマーといったメゾスケールの揺動が微視的揺動と共存し、乱流輸送を規定する、という描像が確立しつつある。この描像により、磁場閉じ込めプラズマで広く観察される、拡散的輸送より圧倒的に速いプラズマの構造あるいは輸送の変化を説明できる可能性がある。プラズマ燃焼の制御のためには輸送のダイナミックな変動を制御する必要があり、そのために動的輸送応答の理解が強く求められている。本研究では、従来の「線形・局所的・決定論的」描像を「非線型揺動・大域的・確率的」描像へと拡張すべく、乱流と乱流輸送研究の枠組みを改革する事を目標とする。「プラズマ乱流物理学」を一段と深く進展させ、動的・大域的な輸送現象のモデルを形成し、磁場閉じ込めプラズマの動的輸送現象を解明し、ITER等の燃焼制御法の確固たる基盤を提供する。

  • 低域混成波による球状トカマクプラズマの電流駆動

    2009.4 - 2014.3

    日本学術振興会(日本) 

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid) 

    トカマク型プラズマ閉じ込め装置では、プラズマ中に流れる電流(プラズマ電流)が不可欠である。プラズマ電流は通常、トーラス中心部に位置するCS と呼ばれるコイルで駆動される。CS を用いずにトカマクを運転できれば、トカマク核融合炉の小型化による経済性向上が実現可能となる。これは、トーラス中心部のスペースが限られている球状トカマク(ST)では、核融合炉の成否に関わる最重要課題である。電子サイクロトロン波(ECW)による低プラズマ電流のST配位形成は、東京大学のTST-2 装置等で既に実証されている。本研究では、これに低域混成波(LHW)による電流駆動を加え、プラズマ電流を増加させることを目指す。これを実証できれば、ST 型核融合炉の実現性が格段と高まる。

  • 圧力駆動電流による球状トカマクの立ち上げと制御

    2009.4 - 2012.3

    日本学術振興会(日本) 

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid) 

  • 乱流プラズマの動的応答と動的輸送の統合研究

    Grant number:21224014  2009 - 2013

    日本学術振興会  科学研究費助成事業  基盤研究(S)

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    Authorship:Coinvestigator(s)  Grant type:Scientific research funding

  • 低域混成波による球状トカマクプラズマの電流駆動

    Grant number:21226021  2009 - 2013

    日本学術振興会  科学研究費助成事業  基盤研究(S)

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid)  Grant type:Scientific research funding

  • 圧力駆動電流による球状トカマクの立ち上げと制御

    Grant number:30249966  2009 - 2011

    日本学術振興会  科学研究費助成事業  基盤研究(A)

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    Authorship:Coinvestigator(s)  Grant type:Scientific research funding

  • 合体生成球状トカマクプラズマ加熱の相乗効果

    Grant number:21244087  2009

    日本学術振興会  科学研究費助成事業  基盤研究(A)

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    Authorship:Coinvestigator(s)  Grant type:Scientific research funding

  • CHSプラズマにおけるL-H遷移時の揺動による運動量輸送に関する研究

    2009

    自然科学研究機構 核融合科学研究所 一般共同研究 (NIFS09KZPB001)

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    Authorship:Principal investigator  Grant type:Contract research

  • QUESTプロジェクト

    2007.4 - 2027.3

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    Authorship:Coinvestigator(s) 

    QUEST (Q-shu University Experiment with Steady-State Spherical Tokamak)は、従来のトカマク装置よりコンパクトで、生成磁場に対して圧力の高い高βと呼ばれるプラズマの閉じ込めが可能な球状トカマク装置として2008年に建設されました。球状トカマク装置は建設コスト及びプラズマの安定性の面で核融合の実現に優位とされています。完成以降、QUESTでは球状トカマク装置での定常運転において課題となる、“プラズマ-壁相互作用“の研究及び“非誘導電流駆動“の研究の学術基盤の形成に取り組み、様々な成果を上げています。また国内外の共同研究において密接な連携協力を図ることで、球状トカマク研究の発展に貢献しています。(http://www.triam.kyushu-u.ac.jp/より抜粋。)

  • 高温不均一磁化プラズマにおける乱流の非線型過程の定量的・実験的研究

    Grant number:18760637  2006 - 2008

    科学研究費助成事業  若手研究(B)

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • 新手法による高ベータ球状トカマクプラズマの生成及び維持

    Grant number:16106013  2004 - 2008

    日本学術振興会  科学研究費助成事業  基盤研究(S)

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid)  Grant type:Scientific research funding

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Educational Activities

  • Lecture : Lectures on fundamentals of plasma physics, fundamentals of data analyses and fundamentals of vacuum technology, thermodynamics and statistical physics.
    Education in laboratory : Education on experimental research of students, and education on basic academic skills for research activity in seminar.

Class subject

  • プラズマ物理I

    2024.6 - 2024.8   Summer quarter

  • プラズマ物理I

    2022.6 - 2022.8   Summer quarter

  • データ解析学

    2022.6 - 2022.8   Summer quarter

  • 総合理工学修士実験

    2022.4 - 2023.3   Full year

  • 総合理工学修士演習

    2022.4 - 2023.3   Full year

  • プラズマ物理I

    2021.6 - 2021.8   Summer quarter

  • 高温プラズマ実験第二

    2020.4 - 2021.3   Full year

  • データ解析学応用・演習

    2019.6 - 2019.8   Summer quarter

  • 高温プラズマ実験第二

    2019.4 - 2020.3   Full year

  • データ解析学基礎

    2019.4 - 2019.6   Spring quarter

  • 核融合プラズマ理工学特論

    2018.10 - 2019.3   Second semester

  • 核融合プラズマ理工学特論

    2018.10 - 2019.3   Second semester

  • 核融合炉エネルギーシステム学特論演習

    2018.10 - 2019.3   Second semester

  • 核融合炉エネルギーシステム学特論演習

    2018.10 - 2019.3   Second semester

  • 高温プラズマ実験第二

    2018.4 - 2019.3   Full year

  • 核融合プラズマ理工学特論

    2017.10 - 2018.3   Second semester

  • 核融合炉エネルギーシステム学特論演習

    2017.10 - 2018.3   Second semester

  • データ解析学応用・演習

    2017.6 - 2017.8   Summer quarter

  • 高温プラズマ実験第二

    2017.4 - 2018.3   Full year

  • データ解析学基礎

    2017.4 - 2017.6   Spring quarter

  • データ解析学基礎

    2016.4 - 2016.9   First semester

  • 高温プラズマ実験第二

    2015.4 - 2016.3   Full year

  • 核融合炉エネルギーシステム学特論演習

    2015.4 - 2015.9   First semester

  • データ解析学応用・演習

    2015.4 - 2015.9   First semester

  • データ解析学基礎

    2015.4 - 2015.9   First semester

  • 真空工学基礎

    2015.4 - 2015.9   First semester

  • 高温プラズマ実験第二

    2014.4 - 2015.3   Full year

  • 核融合炉エネルギーシステム学特論演習

    2014.4 - 2014.9   First semester

  • 真空工学基礎

    2014.4 - 2014.9   First semester

  • データ解析学基礎

    2014.4 - 2014.9   First semester

  • データ解析学基礎

    2013.10 - 2014.3   Second semester

  • 高温プラズマ実験第二

    2013.4 - 2014.3   Full year

  • 核融合炉エネルギーシステム学特論演習

    2013.4 - 2013.9   First semester

  • 真空工学基礎

    2013.4 - 2013.9   First semester

  • 核融合プラズマ輸送特論

    2012.10 - 2013.3   Second semester

  • 真空理工学概論(プラズマ実験基礎論Ⅰ)

    2012.4 - 2012.9   First semester

  • プラズマ基礎物理学(一部)

    2011.4 - 2011.9   First semester

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FD Participation

  • 2012.5   Role:Participation   Title:第2回全学FD 「教育・学習を次のステップへ」 (教育の質向上支援プログラム成果発表会)

    Organizer:University-wide

  • 2012.4   Role:Participation   Title:第一回全学FD(新任教員の研修)

    Organizer:University-wide

  • 2011.9   Role:Participation   Title:九州大学における男女共同参画

    Organizer:[Undergraduate school/graduate school/graduate faculty]

Visiting, concurrent, or part-time lecturers at other universities, institutions, etc.

  • 2023  東京大学・大学院新領域創成科学研究科  Classification:Affiliate faculty  Domestic/International Classification:Japan 

    Semester, Day Time or Duration:元博士学生の論文指導

  • 2022  東京大学・大学院新領域創成科学研究科  Classification:Affiliate faculty  Domestic/International Classification:Japan 

    Semester, Day Time or Duration:元博士学生の論文指導

  • 2021  東京大学・大学院新領域創成科学研究科  Classification:Affiliate faculty  Domestic/International Classification:Japan 

    Semester, Day Time or Duration:8月1日より3月31日まで(元博士学生の論文指導)

  • 2015  東京大学・大学院新領域創成科学研究科  Classification:Affiliate faculty  Domestic/International Classification:Japan 

    Semester, Day Time or Duration:通年(博士学生の指導)

  • 2014  東京大学・大学院新領域創成科学研究科  Classification:Affiliate faculty  Domestic/International Classification:Japan 

    Semester, Day Time or Duration:通年(博士学生の指導)

  • 2013  東京大学・大学院新領域創成科学研究科  Classification:Affiliate faculty  Domestic/International Classification:Japan 

    Semester, Day Time or Duration:通年(博士学生の指導)

  • 2012  東京大学・大学院新領域創成科学研究科  Classification:Affiliate faculty  Domestic/International Classification:Japan 

    Semester, Day Time or Duration:通年(博士学生の指導)

  • 2011  東京大学・大学院新領域創成科学研究科  Classification:Affiliate faculty  Domestic/International Classification:Japan 

    Semester, Day Time or Duration:通年(博士学生の指導)

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Social Activities

  • 中学生の課外学習に対する研究指導

    福岡教育大学附属福岡中学校2年生  2023.7

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    Audience: Infants, Schoolchildren, Junior students, High school students

    Type:Other

  • 総合理工学府 公開講座

    九州大学 大学院総合理工学府  九州大学 筑紫キャンパス  2018.8

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    Audience: General, Scientific, Company, Civic organization, Governmental agency

    Type:Lecture

Activities contributing to policy formation, academic promotion, etc.

  • 2022.4 - 2026.3   国立研究開発法人量子科学技術研究開発機構

    那珂フュージョン科学技術研究所 炉心プラズマ共同企画委員会 プラズマ実験・システム専門部会委員会 委員

Travel Abroad

  • 2012.11

    Staying countory name 1:France   Staying institution name 1:Nancy University