Updated on 2024/12/09

Information

 

写真a

 
KOSUGA YUSUKE
 
Organization
Research Institute for Applied Mechanics Division of Nuclear Fusion Dynamics Associate Professor
Interdisciplinary Graduate School of Engineering Sciences Department of Interdisciplinary Engineering Sciences（Concurrent）
Title
Associate Professor
Profile
Research and education on theoretical modeling of plasma turbulence and transport
External link

Research Areas

  • Others / Others

Degree

  • Ph.D (UCSD)

Research History

  • Kyushu University Research Institute for Applied Mechanics Associate Professor

    2016.6 - Present

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  • August 2012 - December 2012: Research Scientist, WCI Center for Fusion Theory, National Fusion Research Institute, Korea

    August 2012 - December 2012: Research Scientist, WCI Center for Fusion Theory, National Fusion Research Institute, Korea

  • July 2008 - June 2012: Graduate student researcher, Center for Astrophysics and Space Sciences, University of California, San Diego July 2010 - August 2010: Fellow student in International Summer Institute for Modeling in Astrophysics, University of California, Santa Cruz September 2007 - June 2008: Teaching assistant, Department of Physics, University of California, San Diego

Research Interests・Research Keywords

  • Research theme：Dynamics　of Phase Space Plasma Turbulence and its driven transport

    Keyword：プラズマ、乱流、位相空間、流れ、輸送

    Research period： 2013.1 - 2018.12

Awards

  • プラズマ核融合学会学術奨励賞

    2016.11  

  • 日本物理学会若手奨励賞

    2016.3  

Papers

  • On the Nonlinear Coupling of the High Wavenumber Fluctuations Exhibiting the Discrete Spectra Observed in PANTA

    KAWACHI Yuichi, SASAKI Makoto, NISHIZAWA Takashi, KOSUGA Yusuke, TERASAKA Kenichiro, INAGAKI Shigeru, YAMADA Takuma, KASUYA Naohiro, MOON Chanho, NAGASHIMA Yoshihiko, FUJISAWA Akihide

    Plasma and Fusion Research   19 ( 0 )   n/a - 2   2024.11   （ ISSN:1880-6821 eISSN:18806821 ）

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    Language：English   Publisher：The Japan Society of Plasma Science and Nuclear Fusion Research  

    <p>We report on the nonlinear coupling properties of high-wavenumber fluctuation, which exhibits discrete frequency spectra with a frequency span comparable to the ion cyclotron frequency observed in PANTA. Bicoherence analysis is used to investigate this nonlinear coupling. The results indicate a finite coupling between individual discrete peaks but no coupling between the ion cyclotron frequency components of these discrete peaks. This suggests that the observed turbulence with a discrete spectrum is destabilized linearly rather than through nonlinear coupling.</p>

    DOI： 10.1585/pfr.1201031

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  • Electron cyclotron current start-up using a retarding electric field in the QUEST spherical tokamak

    Onchi, T; Idei, H; Hanada, K; Watanabe, O; Miyata, R; Zhang, Y; Koide, Y; Otsuka, Y; Yamaguchi, T; Higashijima, A; Nagata, T; Sekiya, I; Shimabukuro, S; Niiya, I; Kono, K; Zennifa, F; Nakamura, K; Ikezoe, R; Hasegawa, M; Kuroda, K; Nagashima, Y; Ido, T; Kariya, T; Ejiri, A; Murakami, S; Fukuyama, A; Kosuga, Y

    NUCLEAR FUSION   64 ( 10 )   2024.10   （ ISSN:0029-5515 eISSN:1741-4326 ）

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    Publisher：Nuclear Fusion  

    The plasma current start-up experiment is conducted through electron cyclotron (EC) heating in the QUEST spherical tokamak. During the EC heating, the application of a toroidal electric field in the opposite direction to the plasma current effectively inhibits the growth of energetic electrons. Observations show rapid increases in plasma current and hard x-ray count immediately following the cancellation of the retarding electric field. When a compact tokamak configuration maintains equilibrium on the high field side, along with the retarding field, it leads to effective bulk electron heating. This heating achieved an electron temperature of Te ≈ 1 keV at electron density ne > 1.0 × 1018 m−3. Ray tracing of the EC wave verifies that more power absorption into plasma through a single-pass occurs around the second resonance layer with higher values of electron density and temperature.

    DOI： 10.1088/1741-4326/ad6914

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  • Breathing impure plasmas

    Kosuga, Y; Bourgeois, J; Lesur, M; Oyama,

    PLASMA PHYSICS AND CONTROLLED FUSION   66 ( 7 )   2024.7   （ ISSN:0741-3335 eISSN:1361-6587 ）

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    Publisher：Plasma Physics and Controlled Fusion  

    A theory is presented to describe fluctuation dynamics in magnetized plasmas with impurities. In particular, it is shown that impurities can significantly facilitate an abrupt transient increase of fluctuation amplitude. To demonstrate this, a fluid model is derived to describe how impurities enter fluctuation dynamics. At the linear level, a wave similar to a drift wave can be excited in the presence of impurities. The nonlinear dynamics of this wave is formulated via modulational analysis, and it is demonstrated that drift waves with impurities can develop into a breather, a nonlinear wave that exhibits transient increase of amplitude. Our model indicates that nonlinear breathers become easier to be excited as impurity concentration increases. Breathers transiently increase fluctuation amplitude, and hence may be important to expel impurities. Implications on basic experiments and magnetic fusion are discussed as well.

    DOI： 10.1088/1361-6587/ad5105

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  • Equilibrium Flow Structure with Multiple Ion Species in Magnetically Confined Plasmas of an Arbitrary Aspect Ratio

    Kosuga Y.

    Journal of the Physical Society of Japan   93 ( 6 )   2024.6   （ ISSN:00319015 ）

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    Publisher：Journal of the Physical Society of Japan  

    Equilibrium flows of impure plasmas in magnetically confined plasmas of arbitrary aspect ratio are calculated by neoclassical theory. For magnetically confined plasmas with the inverse aspect ratio approaching unity from below, the variation of the magnetic field strength along the field becomes large and as a consequence strong Mirror force arises to trap particles in the magnetic mirror. Thus we expect poloidal flows are weak and we show that this is indeed true for ion and impurity flows by using the Moment approach in banana regime. In contrast, it is shown that appreciable amount of flows exist in collisional regime. Collisional impurities in the spherical tokamak edge are used as a prototypical example of such a case. The flow exhibits strong poloidal variation. As a consequence, strong effective parallel flow shear accumulates in the high field side. Implications on controlling fluctuations and meso-scale structures are discussed.

    DOI： 10.7566/JPSJ.93.064501

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  • Implication of Parallel Velocity Gradient-Driven Instability with Hydrodynamic Electrons to SOL Width

    OYAMA Itsuki, KOSUGA Yusuke

    Plasma and Fusion Research   19 ( 0 )   1403019 - 1403019   2024.5   （ ISSN:1880-6821 eISSN:18806821 ）

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    Language：English   Publisher：The Japan Society of Plasma Science and Nuclear Fusion Research  

    <p>Herein, a new aspect of the parallel velocity gradient (PVG)- driven instability is explored. We present its linear stability analysis and investigate the transport properties of the instability, focusing on a specific electron motion called hydrodynamic. In the realm of hydrodynamic electrons, electron motions across the magnetic field are much faster than those along the magnetic field. This electron motion plays an important role in fluctuation transport. This analysis reveals that the PVG convective cell is newly excited, and its feature of particle transport is favorable, since the particle pinch by PVG with adiabatic electrons disappears.</p>

    DOI： 10.1585/pfr.19.1403019

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

    Kawachi, Y; Sasaki, M; Nishizawa, T; Kosuga, Y; Terasaka, K; Inagaki, S; Yamada, T; Kasuya, N; Moon, C; Nagashima, Y; Fujisawa, A

    PHYSICS OF PLASMAS   31 ( 4 )   2024.4   （ ISSN:1070-664X eISSN:1089-7674 ）

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    Publisher：Physics of Plasmas  

    We investigated the mass dependency of the high-wavenumber turbulence, which occurs at scales smaller than the ion effective Larmor radius, in a partially magnetized plasma column. In this system, two different types of fluctuations were observed: one exhibiting a coherent discrete spectrum, while the other displaying a broadband continuous spectrum. The phase velocities of both types showed a similar mass dependency, approximately matching the ion sound velocity or electron diamagnetic drift velocity. Additionally, we found that the discrete spectrum has a peak interval frequency comparable to the ion cyclotron frequency, which is consistent with ion cyclotron ranges of fluctuations, including ion Bernstein waves.

    DOI： 10.1063/5.0187997

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  • Effect of Edge Shear Flow on Radial Spreading of Ballooning Mode Turbulence

    TAKANO Ayumi, NISHIMURA Seiya, SASAKI Makoto, KOSUGA Yusuke

    Plasma and Fusion Research   19 ( 0 )   1403016 - 1403016   2024.3   （ ISSN:1880-6821 eISSN:18806821 ）

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    Language：English   Publisher：The Japan Society of Plasma Science and Nuclear Fusion Research  

    <p>Turbulent transport by the ballooning mode in tokamak plasmas with edge pedestals is simulated using a reduced set of two-fluid equations. In the absence of the equilibrium poloidal flow, global heat transport by the secondary nonlinear evolution of the resistive ballooning mode turbulence is observed. By examining the effect of the edge shear flow, the global heat transport is suppressed to be almost half, if the edge shear flow is strong enough. A detailed analysis on the radial profile and the poloidal spectrum of the heat flux is newly performed. It is revealed that such confinement improvement is caused by the suppression of the formation of streamer structures that lead to the strong convective heat transport.</p>

    DOI： 10.1585/pfr.19.1403016

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

    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 )   2023.11   （ ISSN:0741-3335 eISSN:1361-6587 ）

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    Publishing type：Research paper (scientific journal)  

    The mutual interaction of drift wave-type modes and zonal flows causes the formation of higher-order nonlinear structures. This study focuses on the spatio-temporal behavior of these higher-order structures in a linear magnetized plasma. The structures include a solitary vortex, a long-lived circumnavigating motion localized both radially and azimuthally, and a short-lived packet of finer-scale fluctuations excited at the position of the solitary vortex. Observing the time evolution of the two-dimensional cross-sectional structures revealed that the packet of finer-scale fluctuations is trapped in the solitary vortex. The trapping times found are consistent with the theoretical evaluation.

    DOI： 10.1088/1361-6587/acfbb3

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

    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 - 115001   2023.11   （ ISSN:0741-3335 eISSN:1361-6587 ）

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    Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    Abstract

    Spectral transition between continuous and discrete spectra has been observed in high-wavenumber turbulence excitation experiments. The transition appeared in neutral gas scanning, which shows that continuous spectra dominate at low gas pressures and discrete spectra dominate at high gas pressures. Both spectra have well smaller spatial scale than the ion effective Larmor radius. The discrete spectra have 6–11 peaks and maximum peak values at 4th or 5th peak. Correlation length analysis reveals that the continuous component is turbulent and the discrete component is coherent. The bicoherence analysis shows that the turbulent spectra have finite nonlinear coupling, whereas the discrete spectra have no corresponding coupling.

    DOI： 10.1088/1361-6587/acfbf7

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    Other Link： https://iopscience.iop.org/article/10.1088/1361-6587/acfbf7/pdf

  • Particle dynamics in a turbulent electric field Reviewed

    A. Guillevic, M. Lesur, X. Garbet, P. Diamond, G. Lo-Cascio, Y. Kosuga, E. Gravier, D. Mandal, A. Chizzo, T. Reveille

    Physics of Plasmas   ( 30 )   2023.5

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

    DOI： doi: 10.1063/5.0135918

  • Particle dynamics in a turbulent electric field

    Guillevic, A; Lesur, M; Garbet, X; Diamond, P; Lo-Cascio, G; Kosuga, Y; Gravier, E; Mandal, D; Ghizzo, A; Réveillé, T

    PHYSICS OF PLASMAS   30 ( 5 )   2023.5   （ ISSN:1070-664X eISSN:1089-7674 ）

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    Publisher：Physics of Plasmas  

    Charged particle velocity-space diffusion in a prescribed one-dimensional turbulent electric field is investigated through numerical trajectories in phase-space and compared against quasi-linear theory (QL), including resonance broadening (RB). A Gaussian spectrum electric field of variable amplitude E is studied in conjunction with two plasma dispersion relations, namely, the Langmuir and ion-acoustic dispersion. A first parameter scan shows that RB effects become significant for a Kubo number K of a few percent. A Kubo number scan shows that diffusion increases as a power law of D K 3 E 3 / 2 for large Kubo numbers. Moreover, at large Kubo numbers, transport processes include significant diffusion measured at velocities much higher than the resonant region, where QL and RB predict negligible diffusion. For times much larger than the trapped particle flight time τb and the autocorrelation time τ0, the velocity distribution departs from a Gaussian. Nevertheless, measurements show that the variance increases linearly in time, with a Hurst parameter of H ∼ 0.5, where the diffusion scales as K 5 / 2 ∝ E 5 / 4 and K 3 / 2 ∝ E 3 / 4 for small and large Kubo number, respectively.

    DOI： 10.1063/5.0135918

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

    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, Ido Takeshi

    Journal of the Physical Society of Japan   92 ( 3 )   033501-1 - 033501-4   2023.2   （ ISSN:00319015 eISSN:13474073 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Physical Society of Japan  

    DOI： 10.7566/jpsj.92.033501

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

    Kaijun Zhao, Yoshihiko Nagashima, Zhibin Guo, Patrick H. Diamond, Jiaqi Dong, Longwen Yan, Kimitaka Itoh, Sanae-I Itoh, Xiaobo Li, Jiquan Li, Akihide Fujisawa, Shigeru Inagaki, Jun Cheng, Jianqiang Xu, Yusuke Kosuga, Makoto Sasaki, Zhengxiong Wang, Huaiqiang Zhang, Yuqian Chen, Xiaogang Cao, Deliang Yu, Yi Liu, Xianming Song, Fan Xia, Shuo Wang

    PLASMA SCIENCE & TECHNOLOGY   25 ( 1 )   2023.1   （ ISSN:1009-0630 eISSN:2058-6272 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing Ltd  

    Enhancements of edge zonal flows, radial electric fields, and turbulence are observed in electron cyclotron resonance heating-heated plasmas (Zhao et al 2013 Nucl. Fusion 53 083011). In this paper, the effects of sawtooth heat pulses on flows and turbulence are presented. These experiments are performed using multiple Langmuir probe arrays in the edge plasmas of the HL-2A tokamak. The edge zonal flows, radial electric fields, and turbulence are all enhanced by sawteeth. Propagation of the zonal flow and turbulence intensities is also observed. The delay time of the maximal intensity of the electric fields, zonal flows, and turbulence with respect to the sawtooth crashes is estimated as similar to 1 ms and comparable to that of the sawtooth-triggered intermediate phases. Not only the zonal flows but also the radial electric fields lag behind the turbulence. Furthermore, the intensities of both the zonal flows and electric fields nearly linearly increase/decrease with the increase/decrease of the turbulence intensity. A double-source predator-prey model analysis suggests that a relatively strong turbulence source may contribute to the dominant zonal flow formation during sawtooth cycles.

    DOI： 10.1088/2058-6272/ac7c60

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  • Beyond resonance broadening and quasilinear theory: towards Kubo &gt;1

    Guillevic A., Lesur M., Garbet X., Diamond P., Lo-Cascio G., Gravier E., Kosuga Y., Mandal D., Ghizzo A., Réveillé T.

    49th EPS Conference on Plasma Physics, EPS 2023   2023   （ ISBN:9781713898672 ）

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    Publisher：49th EPS Conference on Plasma Physics, EPS 2023  

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  • Spatiotemporal dynamics of high-wavenumber turbulence in a basic laboratory plasma

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

    SCIENTIFIC REPORTS   12 ( 1 )   19799   2022.12   （ ISSN:2045-2322 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：NATURE PORTFOLIO  

    High-spatial resolution observation of high-wavenumber broadband turbulence is achieved by controlling the magnetic field to be relatively low and measuring with a azimuthally arranged multi-channel Langmuir array in a basic laboratory plasma. The observed turbulence consists of narrowband low-frequency fluctuations and broadband high-frequency turbulent fluctuations. The low-frequency fluctuations have a frequency of about 0.7 times the ion cyclotron frequency and a spatial scale of 1/10 of the ion inertial scale. In comparison, high-frequency fluctuations have a higher frequency than the ion cyclotron frequency and spatial scales of 1/10-1/40 of the ion inertial scale. Two-dimensional correlation analysis evaluates the spatial and temporal correlation lengths and reveals that the high-wavenumber broadband fluctuations have turbulent characteristics. The measurements give us further understanding of small scale turbulence in space and fusion plasmas.

    DOI： 10.1038/s41598-022-23559-1

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  • A fate of nonlinear evolution of drift waves: Excitation of nonlinear breathers

    Kosuga Yusuke, Inagaki Shigeru, Kawachi Yuichi

    Physics of Plasmas   29 ( 12 )   122301-1 - 122301-15   2022.12   （ ISSN:1070664X eISSN:10897674 ）

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  • A fate of nonlinear evolution of drift waves: Excitation of nonlinear breathers Reviewed International journal

    Y. Kosuga, @S. Inagaki, #Y. Kawachi

    Phys Plasmas   29   122301-1 - 122301-15   2022.12

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

    DOI： doi: 10.1063/5.0122295

    Repository Public URL： https://hdl.handle.net/2324/7173596

  • A fate of nonlinear evolution of drift waves: Excitation of nonlinear breathers

    Y. Kosuga, S. Inagaki, Y. Kawachi

    Physics of Plasmas   29 ( 12 )   2022.12   （ ISSN:1070-664X eISSN:1089-7674 ）

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0122295

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

    ARAKAWA Hiroyuki, SASAKI Makoto, INAGAKI Shigeru, LESUR Maxime, KOSUGA Yusuke, KOBAYASHI Tatsuya, KIN Fumiyoshi, YAMADA Takuma, NAGASHIMA Yoshihiko, FUJISAWA Akihide, ITOH Kimitaka

    Plasma and Fusion Research   17 ( 0 )   1301106 - 1301106   2022.11   （ ISSN:1880-6821 eISSN:18806821 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society of Plasma Science and Nuclear Fusion Research  

    <p>A solitary vortex organization process in drift-wave type fluctuations interacting with the zonal flow was identified experimentally in a linear magnetized plasma. An azimuthal probe array was used to evaluate temporal changes in the amplitude and phase in the density fluctuations. Excitation/damping of the solitary vortex is synchronized with zonal perturbation, and the waveform of drift-wave type fluctuation and its harmonics also changes synchronously. The solitary vortex is formed primarily through the phase modulation of the fundamental drift-wave type fluctuation and its harmonics.</p>

    DOI： 10.1585/pfr.17.1301106

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  • Characteristics of Density and Temperature Fluctuation in Fusion Edge Plasma and Implication on Scrape off Layer Width

    ARAI Shimpei, KOSUGA Yusuke

    Plasma and Fusion Research   17 ( 0 )   1403050 - 1403050   2022.5   （ ISSN:1880-6821 eISSN:18806821 ）

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    Language：English   Publisher：The Japan Society of Plasma Science and Nuclear Fusion Research  

    <p>In this study, in order to evaluate the SOL width of both density and temperature, we analyze Hasegawa-Wakatani model which includes the temperature fluctuations. Different instability regimes, i.e. drift waves and linearly unstable convective cells are studied. It is shown that convective cells are favorable in terms of the heat load reduction on the divertor. Implications on future devices, such as JT-60 SA, ITER, etc, are discussed.</p>

    DOI： 10.1585/pfr.17.1403050

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  • Joint meeting of 9th Asia Pacific-Transport Working Group (APTWG) & EU-US Transport Task Force (TTF) workshop

    Ida, K; McDermott, RM; Holland, C; Choi, MJ; Yu, LM; Kobayashi, T; Kwon, JM; Kosuga, Y

    NUCLEAR FUSION   62 ( 3 )   2022.3   （ ISSN:0029-5515 eISSN:1741-4326 ）

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    Publisher：Nuclear Fusion  

    This conference report summarizes the contributions to, and discussions at the joint meeting of the 9th Asia Pacific-Transport Working Group (APTWG) & EU-US Transport Task Force (TTF) workshop held online, hosted by Kyushu University, Japan, during 6-9 July 2021. The topics of the meeting were organized under five main topics: (1) isotope effect on transport and physics on isotope mixture plasma, (2) turbulence spreading and coupling in core-edge-SOL, (3) interplay between magnetohydrodynamic topology/instability and turbulent transport, (4) interaction between energetic particle driven instability and transport, (5) model reduction and experiments for validation.

    DOI： 10.1088/1741-4326/ac3f19

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  • Numerical investigation on how heat flux avalanche jams trigger the staircase pattern formation Reviewed International journal

    Y. Kosuga, D. Aoki, M. Sasaki

    Phys. Plasmas   2021.4

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  • Flow helicity of wavy plasma turbulence Reviewed

    Y. Kosuga, M. Sasaki, Z. B. Guo

    Physics of Plasmas   27 ( 2 )   2020.2

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

    DOI： 10.1063/1.5121351

  • Formation of radially elongated flow leading to onset of type-III edge localized modes in toroidal plasmas Reviewed

    J. Cheng, J. Q. Dong, K. Itoh, S. I. Itoh, L. W. Yan, J. Q. Xu, M. Jiang, Z. H. Huang, K. J. Zhao, Z. B. Shi, W. L. Zhong, S. Inagaki, T. Kobayashi, K. Ida, Y. Kosuga, M. Sasaki, M. K. Han, Z. X. Wang, M. Xu, Y. Xu

    Nuclear Fusion   60 ( 4 )   2020.1

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

    DOI： 10.1088/1741-4326/ab742a

  • Scrape-off layer width set by non-linear streamer flows in drift wave turbulence Reviewed

    Y. Kosuga, F. Kin, M. Sasaki

    Contributions to Plasma Physics   2020.1

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

    DOI： 10.1002/ctpp.201900141

  • Ion temperature measurement by laser-induced fluorescence spectroscopy in panta Reviewed

    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

    IEEJ Transactions on Electrical and Electronic Engineering   14 ( 10 )   1450 - 1454   2019.10

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    DOI： 10.1002/tee.22962

  • Fourier-rectangular function analysis for cylindrical plasma images Reviewed

    K. Yamasaki, A. Fujisawa, Y. Nagashima, C. Moon, S. Inagaki, N. Kasuya, Y. Kosuga, M. Sasaki, T. Yamada

    Journal of Applied Physics   126 ( 4 )   2019.7

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

    DOI： 10.1063/1.5108717

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

    H. Arakawa, Makoto Sasaki, Inagaki Shigeru, Yusuke Kosuga, T. Kobayashi, Naohiro Kasuya, Takuma Yamada, Yoshihiko Nagashima, F. Kin, akihide fujisawa, K. Itoh, S. I. Itoh

    Physics of Plasmas   26 ( 5 )   2019.5

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

    DOI： 10.1063/1.5094577

  • Parallel flow driven instability due to toroidal return flow in high-confinement mode plasmas Reviewed

    M. Sasaki, K. Itoh, Y. Kosuga, J. Q. Dong, S. Inagaki, T. Kobayashi, J. Cheng, K. J. Zhao, S. I. Itoh

    Nuclear Fusion   59 ( 6 )   2019.5

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

    DOI： 10.1088/1741-4326/ab1292

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

    F. Kin, akihide fujisawa, K. Itoh, Yusuke Kosuga, Makoto Sasaki, Inagaki Shigeru, Yoshihiko Nagashima, Takuma Yamada, Naohiro Kasuya, K. Yamasaki, K. Hasamada, B. Y. Zhang, Y. Kawachi, H. Arakawa, T. Kobayashi, S. I. Itoh

    Physics of Plasmas   26 ( 4 )   2019.4

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

    DOI： 10.1063/1.5093218

  • Estimation of particle flux driven by coherent mode using of statistical conditional averaging Reviewed

    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   2019.1

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

    DOI： 10.1585/PFR.14.1402090

  • Turbulence simulation on zonal flow formations in the presence of parallel flows Reviewed

    Makoto Sasaki, Naohiro Kasuya, Yusuke Kosuga, Tatsuya Kobayashi, Takuma Yamada, Hiroyuki Arakawa, Shigeru Inagaki, Kimitaka Itoh

    Plasma and Fusion Research   14   2019.1

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

    DOI： 10.1585/PFR.14.1401161

  • Role of density modulation in driving nonlinear streamer flows in drift wave turbulence Reviewed

    Yusuke Kosuga, K. Hasamada

    Physics of Plasmas   25 ( 10 )   2018.10

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

    DOI： 10.1063/1.5049726

  • Helical flow structures in torus plasmas

    Yusuke Kosuga

    2018.8

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    Language：English   Publishing type：Research paper (other academic)  

    DOI： 10.1063/1.5048719

  • Extraction of nonlinear waveform in turbulent plasma Reviewed

    F. Kin, K. Itoh, akihide fujisawa, Yusuke Kosuga, Makoto Sasaki, Takuma Yamada, Inagaki Shigeru, Sanae Itoh, T. Kobayashi, Yoshihiko Nagashima, Naohiro Kasuya, H. Arakawa, K. Yamasaki, K. Hasamada

    Physics of Plasmas   25 ( 6 )   2018.6

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    DOI： 10.1063/1.5027124

  • Spatio-temporal dynamics of turbulence trapped in geodesic acoustic modes Reviewed

    Makoto Sasaki, T. Kobayashi, K. Itoh, Naohiro Kasuya, Yusuke Kosuga, akihide fujisawa, Sanae Itoh

    Physics of Plasmas   25 ( 1 )   2018.1

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    DOI： 10.1063/1.5008541

  • Symmetry-breaking of turbulence structure and position identification in toroidal plasmas Reviewed

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

    Plasma and Fusion Research   13   2018.1

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    DOI： 10.1585/PFR.13.1102113

  • Determination of spatiotemporal structure of fluctuations by statistical averaging method Reviewed

    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   2018.1

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    DOI： 10.1585/PFR.13.3401105

  • Spatio-temporal dynamics of turbulence coupling with zonal flows

    Makoto Sasaki, T. Kobayashi, K. Itoh, Naohiro Kasuya, Yusuke Kosuga, akihide fujisawa, Inagaki Shigeru, S. I. Itoh

    45th EPS Conference on Plasma Physics, EPS 2018 45th EPS Conference on Plasma Physics, EPS 2018   449 - 452   2018.1

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  • Nonlinear characteristics of mediator and streamer in linear magnetized plasmas

    F. Kin, akihide fujisawa, K. Itoh, Yusuke Kosuga, Makoto Sasaki, Takuma Yamada, Inagaki Shigeru, S. I. Itoh, T. Kobayashi, Yoshihiko Nagashima, Naohiro Kasuya, H. Arakawa, K. Yamasaki, K. Hasamada

    45th EPS Conference on Plasma Physics, EPS 2018 45th EPS Conference on Plasma Physics, EPS 2018   565 - 568   2018.1

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  • Three-dimensional structure of the streamer in linear plasmas Reviewed

    Takuma Yamada, Inagaki Shigeru, Makoto Sasaki, Yoshihiko Nagashima, Fumiyoshi Kin, Hiroyuki Arakawa, Tatsuya Kobayashi, Kotaro Yamasaki, Naohiro Kasuya, Yusuke Kosuga, akihide fujisawa, Kimitaka Itoh, Sanae Itoh

    Journal of the Physical Society of Japan   87 ( 3 )   2018.1

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    DOI： 10.7566/JPSJ.87.034501

  • Enhancement and suppression of turbulence by energetic-particle-driven geodesic acoustic modes Reviewed

    Makoto Sasaki, K. Itoh, K. Hallatschek, Naohiro Kasuya, M. Lesur, Yusuke Kosuga, Sanae Itoh

    Scientific Reports   7 ( 1 )   2017.12

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    DOI： 10.1038/s41598-017-17011-y

  • How pattern is selected in drift wave turbulence Role of parallel flow shear Reviewed

    Yusuke Kosuga

    Physics of Plasmas   24 ( 12 )   2017.12

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    DOI： 10.1063/1.5001857

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

    Makoto Sasaki, Naohiro Kasuya, K. Itoh, S. Toda, Takuma Yamada, Yusuke Kosuga, Yoshihiko Nagashima, T. Kobayashi, H. Arakawa, K. Yamasaki, akihide fujisawa, Inagaki Shigeru, Sanae Itoh

    Physics of Plasmas   24 ( 11 )   2017.11

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    DOI： 10.1063/1.5000343

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

    K. J. Zhao, Yoshihiko Nagashima, F. M. Li, Yuejiang Shi, P. H. Diamond, J. Q. Dong, K. Itoh, Sanae Itoh, G. Zhuang, H. Liu, Z. P. Chen, J. Cheng, L. Nie, Y. H. Ding, Q. M. Hu, Z. Y. Chen, B. Rao, Z. F. Cheng, L. Gao, X. Q. Zhang, Z. J. Yang, N. C. Wang, L. Wang, W. Jin, W. Yan, J. Q. Xu, Y. F. Wu, L. W. Yan, akihide fujisawa, Inagaki Shigeru, Yusuke Kosuga, Makoto Sasaki

    Nuclear Fusion   57 ( 12 )   2017.9

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    DOI： 10.1088/1741-4326/aa8341

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

    K. Itoh, Sanae Itoh, K. Ida, Inagaki Shigeru, Y. Kamada, K. Kamiya, J. Q. Dong, C. Hidalgo, T. Evans, W. H. Ko, H. Park, T. Tokuzawa, S. Kubo, T. Kobayashi, Yusuke Kosuga, Makoto Sasaki, G. S. Yun, S. D. Song, Naohiro Kasuya, Yoshihiko Nagashima, C. Moon, M. Yoshinuma, R. Makino, T. Tsujimura, H. Tsuchiya, U. Stroth

    Nuclear Fusion   57 ( 10 )   2017.7

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    DOI： 10.1088/1741-4326/aa796a

  • On the p scaling of intrinsic rotation in C-Mod plasmas with edge transport barriers Reviewed

    J. E. Rice, J. W. Hughes, P. H. Diamond, N. Cao, M. A. Chilenski, A. E. Hubbard, J. H. Irby, Yusuke Kosuga, Y. Lin, I. W. Metcalf, M. L. Reinke, E. A. Tolman, M. M. Victora, S. M. Wolfe, S. J. Wukitch

    Nuclear Fusion   57 ( 11 )   2017.7

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    DOI： 10.1088/1741-4326/aa7b44

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

    , K. J. Zhao, Y. Nagashima, Yoshihiko Nagashima, J. Q. Dong, K. Itoh, S. I. Itoh, Sanae Itoh, J. Cheng, A. Fujisawa, akihide fujisawa, Inagaki Shigeru, Yusuke Kosuga, Makoto Sasaki, D. L. Yu, Q. Li, X. Q. Ji, X. M. Song, Y. Huang, Yi Liu, Q. W. Yang, X. T. Ding, X. R. Duan

    Nuclear Fusion   57 ( 7 )   2017.6

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    DOI： 10.1088/1741-4326/aa6f35

  • Observation of subcritical geodesic acoustic mode excitation in the large helical device Reviewed

    T. Ido, K. Itoh, M. Lesur, M. Osakabe, A. Shimizu, K. Ogawa, M. Nishiura, I. Yamada, R. Yasuhara, Yusuke Kosuga, Makoto Sasaki, K. Ida, Inagaki Shigeru, Sanae Itoh

    Nuclear Fusion   57 ( 7 )   2017.4

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    DOI： 10.1088/1741-4326/aa665a

  • Effects of hydrogen isotope in coupling between confinement, wall material and SoL turbulence Reviewed

    K. Itoh, Sanae Itoh, Makoto Sasaki, Yusuke Kosuga

    Nuclear Fusion   57 ( 5 )   2017.3

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    DOI： 10.1088/1741-4326/aa65eb

  • Zonal flow generation in parallel flow shear driven turbulence Reviewed

    Y. Kosuga, S. I. Itoh, K. Itoh

    Physics of Plasmas   24 ( 3 )   2017.3

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    DOI： 10.1063/1.4978485

  • Toroidal momentum channeling of geodesic acoustic modes driven by fast ions Reviewed

    M. Sasaki, N. Kasuya, K. Itoh, Y. Kosuga, M. Lesur, K. Hallatschek, S. I. Itoh

    Nuclear Fusion   57 ( 3 )   2017.3

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    DOI： 10.1088/1741-4326/aa4eb4

  • Role of phase space structures in collisionless drift wave turbulence and impact on transport modeling Reviewed

    Yusuke Kosuga, Sanae Itoh, P. H. Diamond, K. Itoh, M. Lesur

    Nuclear Fusion   57 ( 7 )   2017.3

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    DOI： 10.1088/1741-4326/57/7/072006

  • How turbulence fronts induce plasma spin-up Reviewed

    Yusuke Kosuga, Sanae Itoh, P. H. Diamond, K. Itoh

    Physical Review E   95 ( 3 )   2017.3

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    DOI： 10.1103/PhysRevE.95.031203

  • Zonal flow generation in parallel flow shear driven turbulence Reviewed International journal

    Y. Kosuga, S.-I. Itoh and K. Itoh

    Phys. Plasmas   24   2017.1

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  • Phenomenological classification of turbulence states in linear magnetized plasma PANTA Reviewed

    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   2017.1

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    DOI： 10.1585/pfr.12.1401019

  • On the application of cross bispectrum and cross bicoherence Reviewed

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

    Plasma and Fusion Research   12   2017.1

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    DOI： 10.1585/pfr.12.1101003

  • Nonlinear coupling of driftwaves and high frequency fluctuation on PANTA Reviewed

    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   2017.1

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    DOI： 10.1585/pfr.12.1201034

  • Multiple-instabilities in magnetized plasmas with density gradient and velocity shears Reviewed

    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   2017.1

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    DOI： 10.1585/pfr.12.1401042

  • Coexistence of driftwaves and d'angelo modes at different position and frequency in linear plasma device Reviewed

    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   2017.1

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    DOI： 10.1585/pfr.12.1201008

  • A simple model for electron dissipation in trapped ion turbulence Reviewed

    Physics of Plasmas   24 ( 1 )   2017.1

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    DOI： 10.1063/1.4974269

  • How turbulence fronts induce plasma spin-up Reviewed International journal

    Y. Kosuga, S.-I. Itoh, P.H. Diamond, K. Itoh

    Phys. Rev. E   95   2017.1

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  • Role of phase space structures in collisionless drift wave turbulence and impact on transport modeling Reviewed International journal

    Y. Kosuga, S.-I. Itoh, P.H. Diamond, K. Itoh, and M. Lesur

    Nucl. Fusion   57   2017.1

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  • A branch of energetic-particle driven geodesic acoustic modes due to magnetic drift resonance Reviewed

    M. Sasaki, N. Kasuya, K. Itoh, K. Hallatschek, M. Lesur, Y. Kosuga, S. I. Itoh

    Physics of Plasmas   23 ( 10 )   2016.10

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    DOI： 10.1063/1.4963397

  • Structure formation in parallel ion flow and density profiles by cross-ferroic turbulent transport in linear magnetized plasma Reviewed

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

    Physics of Plasmas   23 ( 10 )   2016.10

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    DOI： 10.1063/1.4965915

  • Changes of particle flux during end-plate biasing experiment in PANTA Reviewed

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

    journal of the physical society of japan   85 ( 9 )   2016.9

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    DOI： 10.7566/JPSJ.85.093501

  • Synchronization of Geodesic Acoustic Modes and Magnetic Fluctuations in Toroidal Plasmas Reviewed

    K. J. Zhao, Y. Nagashima, P. H. Diamond, J. Q. Dong, K. Itoh, S. I. Itoh, L. W. Yan, J. Cheng, A. Fujisawa, S. Inagaki, Y. Kosuga, M. Sasaki, Z. X. Wang, L. Wei, Z. H. Huang, D. L. Yu, W. Y. Hong, Q. Li, X. Q. Ji, X. M. Song, Y. Huang, Yi Liu, Q. W. Yang, X. T. Ding, X. R. Duan

    Physical review letters   117 ( 14 )   2016.9

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    DOI： 10.1103/PhysRevLett.117.145002

  • On magnetic signals of a large-scale quasi-electrostatic perturbation Reviewed

    Kimitaka Itoh, Sanae I. Itoh, Katsumi Ida, Yusuke Kosuga

    journal of the physical society of japan   85 ( 9 )   2016.9

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    DOI： 10.7566/JPSJ.85.094504

  • Eddy, drift wave and zonal flow dynamics in a linear magnetized plasma Reviewed

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

    Scientific reports   6   2016.9

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    DOI： 10.1038/srep33371

  • Turbulence Dynamics with the Coupling of Density Gradient and Parallel Velocity Gradient in the Edge Plasmas Reviewed

    Y. Kosuga, S. I. Itoh, K. Itoh

    Contributions to Plasma Physics   56 ( 6-8 )   511 - 515   2016.8

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    DOI： 10.1002/ctpp.201610047

  • Onset condition of the subcritical geodesic acoustic mode instability in the presence of energetic-particle-driven geodesic acoustic mode Reviewed

    K. Itoh, Sanae Itoh, Y. Kosuga, M. Lesur, T. Ido

    Plasma Physics Reports   42 ( 5 )   418 - 423   2016.5

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    DOI： 10.1134/S1063780X16050056

  • Nonlinear excitation of subcritical fast ion-driven modes Reviewed

    M. Lesur, K. Itoh, T. Ido, S. I. Itoh, Y. Kosuga, M. Sasaki, S. Inagaki, M. Osakabe, K. Ogawa, A. Shimizu, K. Ida

    Nuclear Fusion   56 ( 5 )   2016.4

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    DOI： 10.1088/0029-5515/56/5/056009

  • A Concept of Cross-Ferroic Plasma Turbulence Reviewed

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

    Scientific reports   6   2016.2

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    DOI： 10.1038/srep22189

  • A calibration of setting of mach probes by observing GAM oscillations Reviewed

    Kimitaka Itoh, Kaijun Zhao, Jiaqi Dong, Sanae I. Itoh, Akihide Fujisawa, Shigeru Inagaki, Makoto Sasaki, Yoshihiko Nagashima, Yusuke Kosuga, Jun Cheng, Tatsuya Kobayashi

    Plasma and Fusion Research   11   2016.1

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    DOI： 10.1585/pfr.11.1402002

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

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

    Plasma and Fusion Research   11   2016.1

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    DOI： 10.1585/pfr.11.1201091

  • Flux of parallel flow momentum by parallel shear flow driven instability Reviewed

    Yusuke Kosuga, Sanae I. Itoh, Kimitaka Itoh

    Plasma and Fusion Research   11   2016.1

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    DOI： 10.1585/pfr.11.1203018

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

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

    Physics of Plasmas   22 ( 11 )   2015.11

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    DOI： 10.1063/1.4934537

  • Evaluation of nonlinear mode coupling during end plate biasing experiment in PANTA Reviewed International journal

    Y. Kosuga, S.-I. Itoh and K. Itoh

    Plasma Fusion Res.   10   3401043-1 - 3401043-1   2015.4

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  • Turbulence elasticity A key concept to a unified paradigm of L→I→H transition Reviewed

    Z. B. Guo, P. H. Diamond, Y. Kosuga, D. Gürcan

    55 ( 4 )   2015.4

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    We present a theory of turbulence elasticity, which follows from delayed response of drift waves (DWs) to zonal flow (ZF) shears. It is shown that when |V′ZF|/Δωk1, with |V′ZF| the ZF shearing rate and Δωk the local turbulence decorrelation rate, the ZF evolution equation is converted from a diffusion equation to a telegraph equation. This insight provides a natural framework for understanding temporally periodic ZF structures, e.g., propagation of the ZF/turbulence intensity fronts. Furthermore, by incorporating the elastic property of the DW-ZF turbulence, we propose a unified paradigm of low-confinement-mode to intermediate-confinement-mode to high-confinement-mode (L→I→H) transitions. In particular, we predict the onset and termination conditions of the limit cycle oscillations, i.e. the I-mode. The transition from an unstable L-mode to I-mode is predicted to occur when Δωk<|V′ZF|<V′cr, where V′cr is a critical flow shearing rate and is derived explicitly. If |V′E×B|>V′cr (VEB is mean E×B shear flow driven by edge radial electrostatic field), the I-mode will terminate and spiral into the H-mode.

    DOI： 10.1088/0029-5515/55/4/043022

  • Density peaking by parallel flow shear driven instability Reviewed International journal

    F. Kin, T. Yamada, S. Inagaki, H. Arakawa, Y. Nagashima, N. Kasuya, A. Fujisawa, K. Nakaganishi, H. Kono, T. Mizokami, M. Sasaki, M. Lesur, Y. Kosuga, K. Itoh, and S.-I. Itoh

    Plasma Fusion Res.   10   3401024-1 - 3401024-7   2015.4

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  • Turbulence elasticity: a key concept to univfied paradigm of L→I→H transition Reviewed International journal

    55   043022-1 - 043022-4   2015.3

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  • Finding the Elusive E × B staircase in magnetized plasmas Reviewed International journal

    114   085004-1 - 085004-5   2015.2

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  • Finding the Elusive E×B Staircase in Magnetized Plasmas Reviewed

    G. Dif-Pradalier, G. Hornung, Ph Ghendrih, Y. Sarazin, F. Clairet, L. Vermare, P. H. Diamond, J. Abiteboul, T. Cartier-Michaud, C. Ehrlacher, D. Estève, X. Garbet, V. Grandgirard, O. D. Gürcan, P. Hennequin, Y. Kosuga, G. Latu, P. Maget, P. Morel, C. Norscini, R. Sabot, A. Storelli

    114 ( 8 )   2015.2

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    Turbulence in hot magnetized plasmas is shown to generate permeable localized transport barriers that globally organize into the so-called "ExB staircase" [G. Dif-Pradalier et al., Phys. Rev. E, 82, 025401(R) (2010)]. Its domain of existence and dependence with key plasma parameters is discussed theoretically. Based on these predictions, staircases are observed experimentally in the Tore Supra tokamak by means of high-resolution fast-sweeping X-mode reflectometry. This observation strongly emphasizes the critical role of mesoscale self-organization in plasma turbulence and may have far-reaching consequences for turbulent transport models and their validation.

    DOI： 10.1103/PhysRevLett.114.085004

  • Towards an emerging understanding of non-local phenomena and non-local transport Reviewed International journal

    Nucl. Fusion   55   013022-1 - 013022-19   2015.1

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  • Towards an emerging understanding of non-locality phenomena and non-local transport Reviewed

    Nuclear Fusion   55 ( 1 )   2015.1

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    DOI： 10.1088/0029-5515/55/1/013022

  • Test of the telegraph equation for transport dynamics in plasma Reviewed

    Shigeru Inagaki, Kimitaka Itoh, Sanae I. Itoh, Yusuke Kosuga, Maxime Lesur, Naohiro Kasuya

    Plasma and Fusion Research   10 ( 2015 )   1 - 2   2015.1

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    DOI： 10.1585/pfr.10.1203002

  • Evaluation of non-linear mode coupling during end-plate biasing experiment in PANTA Reviewed

    Fumiyoshi Kin, Takuma Yamada, Shigeru Inagaki, Hiroyuki Arakawa, Yoshihiko Nagashima, Naohiro Kasuya, Akihide Fujisawa, Kousuke Nakanishi, Hikaru Kono, Takaaki Mizokami, Makoto Sasaki, Maxime Lesur, Yusuke Kosuga, Kimitaka Itoh, Sanae I. Itoh

    Plasma and Fusion Research   10   2015.1

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    DOI： 10.1585/pfr.10.3401043

  • Density peaking by parallel flow shear driven instability Reviewed

    Yusuke Kosuga, Sanae I. Itoh, Kimitaka Itoh

    Plasma and Fusion Research   10   2015.1

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    DOI： 10.1585/pfr.10.3401024

  • APTWG The 4th Asia-Pacific Transport Working Group Meeting Reviewed

    K. Ida, J. M. Kwon, M. Leconte, W. H. Ko, S. Inagaki, Y. Todo, Y. Kosuga

    Nuclear Fusion   55 ( 1 )   2015.1

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    DOI： 10.1088/0029-5515/55/1/017001

  • Test of the Telegraph Equation for Transport Dynamics in Plasma Reviewed International journal

    S. Inagaki, K. Itoh, S.-I. Itoh, Y. Kosuga, M. Lesur, and N. Kasuya

    Plasma Fusion Res.   10   1203002-1 - 1203002-2   2015.1

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  • The 4th Asia-Pacific transport working group (APTWG) meeting Reviewed International journal

    K. Ida, J.M. Kwon, M. Leconte, W.H. Ko, S. Inagaki, Y. Todo, and Y. Kosuga

    Nucl. Fusion   55   017001-1 - 017001-10   2014.12

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  • 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

    Nucl. Fusion   54   114010-1 - 114010-5   2014.11

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  • Phase-space jets drive transport and anomalous resistivity Reviewed

    M. Lesur, P. H. Diamond, Y. Kosuga

    Physics of Plasmas   21 ( 11 )   2014.11

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    DOI： 10.1063/1.4902525

  • End plate biasing experiments in linear magnetized plasmas Reviewed

    Takuma Yamada, Inagaki Shigeru, T. Kobayashi, Yoshihiko Nagashima, T. Mitsuzono, Y. Miwa, K. Nakanishi, H. Fujino, Makoto Sasaki, Naohiro Kasuya, M. Lesur, Yusuke Kosuga, akihide fujisawa, Sanae Itoh, K. Itoh

    Nuclear Fusion   54 ( 11 )   2014.11

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

  • Phase-space jets drive transport and anomalous resistivity Reviewed International journal

    M. Lesur, P.H. Diamond, and Y. Kosuga

    Phys. Plasmas   21   112307-1 - 112307-9   2014.11

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  • Ion temperature gradient driven turbulence with strong trapped ion resonance Reviewed

    Y. Kosuga, S. I. Itoh, P. H. Diamond, K. Itoh, M. Lesur

    Physics of Plasmas   21 ( 10 )   2014.10

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    DOI： 10.1063/1.4897179

  • Turbulence elasticity-A new mechanism for transport barrier dynamics Reviewed International journal

    Z. Guo, P.H. Diamond, Y. Kosuga, O.D. Gurcan

    Phys. Plasmas   21   090702-1 - 090702-5   2014.9

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  • Turbulence elasticity - A new mechanism for transport barrier dynamics Reviewed

    Physics of Plasmas   21 ( 9 )   2014.9

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    DOI： 10.1063/1.4894695

  • Ion temperature gradient driven Turbulence with strong trapped ion resonance Reviewed International journal

    Y. Kosuga, S.-I. Itoh, P.H. Diamond, K. Itoh, and M. Lesur

    Phys. Plasmas   21   102303-1 - 102303-10   2014.9

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  • Nonlinear current-driven ion-acoustic instability driven by phase-space structures Reviewed

    M. Lesur, P. H. Diamond, Y. Kosuga

    Plasma Physics and Controlled Fusion   56 ( 7 )   2014.7

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    DOI： 10.1088/0741-3335/56/7/075005

  • E × B shear pattern formation by radial propagation of heat flux waves Reviewed

    Y. Kosuga, P. H. Diamond, G. Dif-Pradalier, O. D. Gürcan

    21 ( 5 )   2014.5

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    A novel theory to describe the formation of E×B flow patterns by radially propagating heat flux waves is presented. A model for heat avalanche dynamics is extended to include a finite delay time between the instantaneous heat flux and the mean flux, based on an analogy between heat avalanche dynamics and traffic flow dynamics. The response time introduced here is an analogue of the drivers' response time in traffic dynamics. The microscopic foundation for the time delay is the time for mixing of the phase space density. The inclusion of the finite response time changes the model equation for avalanche dynamics from Burgers equation to a nonlinear telegraph equation. Based on the telegraph equation, the formation of heat flux jams is predicted. The growth rate and typical interval of jams are calculated. The connection of the jam interval to the typical step size of the E×B staircase is discussed.

    DOI： 10.1063/1.4872018

  • The 3rd Asia-Pacific Transport Working Group(APTWG) Meeting Reviewed International journal

    H. Jhang, P.H. Diamond, M. Leconte, K. Ida, J.M. Kwon, N. Tamura, and Y. Kosuga

    Nucl. Fusion   54   047001-1 - 047001-8   2014.4

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  • Elasticity in drift-wave-zonal-flow turbulence Reviewed

    Physical Review E - Statistical, Nonlinear, and Soft Matter Physics   89 ( 4 )   2014.4

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    DOI： 10.1103/PhysRevE.89.041101

  • The 3rd Asia-Pacific Transport Working Group(APTWG) Meeting Reviewed International journal

    H. Jhang, P.H. Diamond, M. Leconte, K. Ida, J.M. Kwon, N. Tamura, and Y. Kosuga

    Nucl. Fusion   54   047001-1 - 047001-8   2014.4

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  • ExB shear pattern formation by radial propagation of heat flux waves Reviewed International journal

    Y. Kosuga, P. H. Diamond, G. Dif-Pradalier, O. D. Gurcan

    Phys. Plasmas   21   055701-1 - 055701-7   2014.4

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  • Elasticity in drift-wave–zonal-flow turbulence Reviewed International journal

    89   041101(R)-1 - 041101(R)-5   2014.4

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  • Nonlinear current-driven ion-acoustic instability driven by phase-space structures Reviewed International journal

    M. Lesur, P. H. Diamond, Y. Kosuga

    Plasma Phys. Control. Fusion   56   075005-1 - 075005-13   2014.4

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

    Plasma Fusion Res.   9   1201016-1 - 1201016-2   2014.3

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  • Relative Dispersion of Trapped Ion Granulations in Sheared Flows Reviewed International journal

    Plasma Fusion Res.   9   3403018-1 - 3403018-4   2014.3

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  • Immediate Influence of External Sources on Turbulent Plasma Transport Reviewed International journal

    JPS Conf. Proc.   1   015002-1 - 015002-5   2014.3

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  • Identification of quasi-periodic nonlinear waveforms in turbulent plasmas Reviewed

    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, Kimitaka Itoh

    Plasma and Fusion Research   9   2014.1

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    DOI： 10.1585/pfr.9.1201016

  • The 3rd Asia-Pacific Transport Working Group (APTWG) Meeting Reviewed

    Hogun Jhang, P. H. Diamond, M. Leconte, K. Ida, J. M. Kwon, N. Tamura, Yusuke Kosuga

    Nuclear Fusion   54 ( 4 )   2014.1

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

    DOI： 10.1088/0029-5515/54/4/047001

  • Relative dispersion of trapped ion granulations in sheared flows Reviewed

    Yusuke Kosuga, Sanae I. Itoh, Patrick H. Diamond, Kimitaka Itoh, Maxime Lesur

    Plasma and Fusion Research   9 ( SPECIALISSUE.2 )   2014.1

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

    DOI： 10.1585/pfr.9.3403018

  • Conversion of poloidal flows into toroidal flows by phase space structures in trapped ion resonance driven turbulence Reviewed

    Y. Kosuga, S. I. Itoh, P. H. Diamond, K. Itoh

    Plasma Physics and Controlled Fusion   55 ( 12 )   2013.12

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    DOI： 10.1088/0741-3335/55/12/125001

  • Conversion of poloidal flows into toroidal flows by phase space structures in trapped ion resonance driven turbulence Reviewed International journal

    Plasma Phys. Control. Fusion   55   125001-1 - 125001-7   2013.10

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  • An overview of intrinsic torque and momentum transport bifurcations in toroidal plasmas Reviewed

    Nuclear Fusion   53 ( 10 )   2013.10

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    DOI： 10.1088/0029-5515/53/10/104019

  • An overview of intrinsic torque and momentum transport bifurcations in toroidal plasmas Reviewed International journal

    Nucl. Fusion   53   104019-1 - 104019-21   2013.9

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  • Spatio-temporal evolution of the L → H and H → L transitions Reviewed

    K. Miki, P. H. Diamond, N. Fedorczak, Ö D. Gürcan, M. Malkov, C. Lee, Y. Kosuga, G. Tynan, G. S. Xu, T. Estrada, D. McDonald, L. Schmitz, K. J. Zhao

    53 ( 7 )   2013.7

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    Understanding the L → H and H → L transitions is crucial to successful ITER operation. In this paper we present novel theoretical and modelling study results on the spatio-temporal dynamics of the transition. We place a special emphasis on the role of zonal flows and the micro → macro connection between dynamics and the power threshold (PT) dependences. The model studied evolves five coupled fields in time and one space dimension, in simplified geometry. The content of this paper is (a) the model fundamentals and the space-time evolution during the L → I → H transition, (b) the physics origin of the well-known ∇B-drift asymmetry in PT, (c) the role of heat avalanches in the intrinsic variability of the L → H transition, (d) the dynamics of the H → L back transition and the physics of hysteresis, (e) conclusion and discussion, with a special emphasis on the implications of transition dynamics for the L → H power threshold scalings.

    DOI： 10.1088/0029-5515/53/7/073044

  • Spatio-temporal evolution of the L-H and H-L transitions Reviewed International journal

    K. Miki, P.H. Diamond, N. Fedorczak, O.D. Gurcan, M. Malkov, C. Lee, Yusuke Kosuga, G. Tynan, G.S. Xu, T. Estrada, D. McDonald, L. Schmitz, K.J. Zhao

    Nucl. Fusion   53   073044-1 - 073044-10   2013.6

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  • Blob-Hole Structures as Non-Axisymmetric Equilibrium Solutions for Potential Vorticity Conserving Fluids Reviewed International journal

    Yusuke Kosuga, P.H. Diamond

    Plasma Fusion Res.   8   2403080-1 - 2403080-4   2013.6

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  • Progress on theoretical issues in modelling turbulent transport Reviewed

    Nuclear Fusion   53 ( 4 )   2013.4

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

    DOI： 10.1088/0029-5515/53/4/043008

  • Progress on theoretical issues in modelling turbuelnt transport Reviewed International journal

    Y. Kosuga, P.H. Diamond, L. Wang, O.D. Gurcan, T.S. Hahm

    Nucl. Fusion   53   2013.3

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  • How the propagation of heat-flux modulations triggers E×B flow pattern formation Reviewed

    Y. Kosuga, P. H. Diamond, O. D. Gürcan

    110 ( 10 )   2013.3

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    We propose a novel mechanism to describe E×B flow pattern formation based upon the dynamics of propagation of heat-flux modulations. The E×B flows of interest are staircases, which are quasiregular patterns of strong, localized shear layers and profile corrugations interspersed between regions of avalanching. An analogy of staircase formation to jam formation in traffic flow is used to develop an extended model of heat avalanche dynamics. The extension includes a flux response time, during which the instantaneous heat flux relaxes to the mean heat flux, determined by symmetry constraints. The response time introduced here is the counterpart of the drivers' response time in traffic, during which drivers adjust their speed to match the background traffic flow. The finite response time causes the growth of mesoscale temperature perturbations, which evolve to form profile corrugations. The length scale associated with the maximum growth rate scales as Δ2∼(v thi/λTi)ρi√χ neoτ, where λTi is a typical heat pulse speed, χneo is the neoclassical thermal diffusivity, and τ is the response time of the heat flux. The connection between the scale length Δ2 and the staircase interstep scale is discussed.

    DOI： 10.1103/PhysRevLett.110.105002

  • How the Propagation of Heat-Flux Modulations Triggers ExB Flow Pattern Formation Reviewed International journal

    Y. Kosuga, P.H. Diamond, and O.D. Gurcan

    Phys. Rev. Lett.   110   2013.3

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  • Transport of radial heat flux and second sound in fusion plasmas Reviewed International journal

    O.D. Gurcan, P.H. Diamond, X. Garbet, V. Berionni, G. Dif-Pradalier, P. Hennequin, P. Morel, Y. Kosuga, and L. Vermare

    Phys. Plasmas   20   2013.2

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  • Transport of radial heat flux and second sound in fusion plasmas Reviewed

    Physics of Plasmas   20 ( 2 )   2013.2

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    DOI： 10.1063/1.4792161

  • Blob-hole structures as non-axisymmetric equilibrium solutions for potential vorticity conserving fluids Reviewed

    Yusuke Kosuga, Patrick H. Diamond

    Plasma and Fusion Research   8   2013.1

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

    DOI： 10.1585/pfr.8.2403080

  • Drift hole structrue and dynamics with turbulence driven flows Reviewed International journal

    Kosuga Yusuke, P.H. Diamond

    Phys. Plasmas   19   2012.7

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  • Drift hole structure and dynamics with turbulence driven flows Reviewed

    Y. Kosuga, P. H. Diamond

    Physics of Plasmas   19 ( 7 )   2012.7

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    DOI： 10.1063/1.4737197

  • On relaxation and transport in gyrokinetic drift wave turbulence with zonal flow Reviewed International journal

    Kosuga Yusuke, P.H. Diamond

    Phys. Plasmas   18   122305-1 - 122305-16   2011.12

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  • On relaxation and transport in gyrokinetic drift wave turbulence with zonal flow Reviewed

    Y. Kosuga, P. H. Diamond

    Physics of Plasmas   18 ( 12 )   2011.12

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

    DOI： 10.1063/1.3662428

  • Edge Temperature Gradient as Intrinsic Rotation Drive in Alcator C-Mod Tokamak Plasmas Reviewed International journal

    J.E. Rice, J.W. Hughes, P.H. Diamond, Kosuga Yusuke, Y.A. Podpaly, M.L. Reinke, M.J. Greenwald, O.D. Gurcan, T.S. Hahm, A.E. Hubbard, E.S. Marmar, C.J. McDevitt, D.G. Whyte

    Phys. Rev. Lett.   106   215001-1 - 215001-4   2011.5

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  • Edge temperature gradient as intrinsic rotation drive in alcator C-Mod tokamak plasmas Reviewed

    Physical Review Letters   106 ( 21 )   2011.5

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

    DOI： 10.1103/PhysRevLett.106.215001

  • Collisionless Dynamical Friction and Relaxation in a Simple Drift Wave-Zonal Flow Turbulence Reviewed International journal

    Yusuke KOSUGA and Patrick H. DIAMOND

    Plasma Fusion Res.   5   2010.12

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  • On the efficiency of intrinsic rotation generation in tokamaks Reviewed International journal

    Y. Kosuga, P.H. Diamond, and O.D. Gurcan

    Phys. Plasmas   17   2010.10

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  • On the efficiency of intrinsic rotation generation in tokamaks Reviewed

    Physics of Plasmas   17 ( 10 )   2010.10

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

    DOI： 10.1063/1.3496055

  • Momentum theorems and the structure of atmospheric jets and zonal flows in plasmas Reviewed

    P. H. Diamond, O. D. Gurcan, T. S. Hahm, K. Miki, Y. Kosuga, X. Garbet

    Plasma Physics and Controlled Fusion   50 ( 12 )   2008.12

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    DOI： 10.1088/0741-3335/50/12/124018

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

    Fujisawa, A; Kasuya, N; Kosuga, Y; Nagashima, Y; Sasaki, M; Yamada, T

    REVIEWS OF MODERN PLASMA PHYSICS   7 ( 1 )   1900   （ ISSN:2367-3192 ）

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Reviews of Modern Plasma Physics  

    This memorial note for Professor Sanae-I Itoh presents her specific achievements in physics research alongside her wider record of accomplishment in the field of magnetically confined plasmas. The topics include bifurcation phenomena (e.g., H-mode and improved confinement modes), turbulence-generated structures (e.g., zonal flows and streamers), and fundamental concepts and processes in plasma turbulence (e.g. nonlinear couplings and energy transfer. The note focuses initially on results obtained through her integration of theory, simulation, and experiment, particularly those arising from a low temperature plasma facility at Kyushu University. We then describe contemporary challenges in plasma turbulence which Sanae addressed with great interest, and consider some of the perspectives that were opened by her achievements.

    DOI： 10.1007/s41614-023-00123-6

    Web of Science

    Scopus

  • Observation of Plasma Turbulence in a Hall Thruster Using Microwave Interferometry Reviewed

    N. Yamamoto, N. Kuwabara, D. Kuwabara, Y. Kosuga, G. Dif-Pradalier

    Journal of Propulsion and Power   39 ( 6 )   849 - 855   1900   （ ISSN:0748-4658 eISSN:1533-3876 ）

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

    DOI： 10.2514/1.B38711

    Web of Science

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▼display all

Presentations

  • Formation and dynamics of phase space structures in drift wave turbulence Invited International conference

    Y. Kosuga

    30th International Toki Conference  2021.10 

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    Event date： 2022.5

    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

  • Interplay among 3D flows in turbulent plasmas Invited International conference

    Y. Kosuga

    3rd Asia Pacific Conference on Plasma Physics  2019.11 

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    Event date： 2019.12

    Language：English   Presentation type：Oral presentation (general)  

    Country：China  

  • Scrape off layer width set by nonlinear streamer flows International conference

    Y. Kosuga

    The APTWG Mini-workshop  2019.6 

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    Event date： 2019.6

    Language：English   Presentation type：Oral presentation (general)  

    Country：China  

  • ドリフト波乱流における螺旋流構造生成と旋回度を用いた解析

    小菅 佑輔, 佐々木 真, Z.B. Guo

    日本物理学会　第74回年次大会  2019.3 

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    Event date： 2019.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：九州大学伊都キャンパス   Country：Japan  

  • How selectively excite nonlinear streamer flows in drift wave turbulence? International conference

    Y. Kosuga

    Max Planck Princeton Center Workshop 2019  2019.2 

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    Event date： 2019.2

    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

  • ドリフト波乱流における密度変調が駆動する径方向流れ

    小菅 佑輔,挾間田 一誠

    プラズマ・核融合学会 第35回年会  2018.12 

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    Event date： 2018.12

    Language：Japanese  

    Venue：大阪大学   Country：Japan  

  • How secondary flow is selected in drift wave turbulence: Role of parallel flow shear International conference

    Y. Kosuga

    2nd Asia-Pacific Conference on Plasma Physics  2018.11 

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    Event date： 2018.11

    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

  • Modulational analysis for the flow generation by drift wave International conference

    Y. Kosuga

    The First Chengdu Theory Festival  2018.8 

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    Event date： 2018.8

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Country：China  

  • Modulational approach for the nonlinear dynamics of Langmuir wave International conference

    Y. Kosuga

    The First Chengdu Theory Festival  2018.8 

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    Event date： 2018.8

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Country：China  

  • Revisiting the excitation of radially elongated convective cells in drift wave turbulence International conference

    Y. Kosuga

    The 19th International Congress on Plasma Physics  2018.6 

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    Event date： 2018.6

    Language：English  

    Country：Canada  

  • PANTAにおける乱流駆動輸送

    稲垣 滋, 小林達哉, 三輪雄大, 満薗友宏, 中西康介, 山田 琢磨, 永島 芳彦, 糟谷 直宏, 佐々木 真, Maxime Lesur, 小菅 佑輔, 藤澤 彰英, 伊藤 早苗, 伊藤公孝

    物理学会　第６９回年次大会  2014.3 

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    Event date： 2014.3

    Language：Japanese   Presentation type：Oral presentation (general)  

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

  • シア流れと速度空間自由度を含んだプラズマ乱流による混合過程

    小菅 佑輔, 伊藤 早苗, 伊藤公孝

    物理学会　第６９回年次大会  2014.3 

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    Event date： 2014.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Country：Japan  

  • Electrostatic trapping nonlinearity, a key element of turbulent transport.

    2014.3 

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    Event date： 2014.3

    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

  • 直線磁化プラズマ装置PANTAにおけるイオン温度勾配モードの励起と同定

    三輪雄大, 糟谷 直宏, 稲垣 滋, 小林達哉, 満薗友宏, 中西康介, 山田 琢磨, 永島 芳彦, 藤澤 彰英, 佐々木 真, 小菅 佑輔, Maxime Lesur, 伊藤公孝, 伊藤 早苗

    物理学会　第６９回年次大会  2014.3 

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    Event date： 2014.3

    Language：Japanese   Presentation type：Oral presentation (general)  

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

  • PANTAにおけるプラズマ乱流構造の相図

    小林達哉, 稲垣 滋, 佐々木 真, 山田 琢磨, 永島 芳彦, 小菅 佑輔, 糟谷 直宏, 矢木雅敏, 藤澤 彰英, 伊藤 早苗, 伊藤公孝

    物理学会　第６９回年次大会  2014.3 

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    Event date： 2014.3

    Language：Japanese   Presentation type：Oral presentation (general)  

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

  • PANTAにおけるエンドプレートバイアス実験

    山田 琢磨, 稲垣 滋, 小林達哉, 永島 芳彦, 満薗友宏, 三輪雄大, 中西康介, 佐々木 真, 糟谷 直宏, Maxime Lesur, 小菅 佑輔, 藤澤 彰英, 伊藤 早苗, 伊藤公孝

    物理学会　第６９回年次大会  2014.3 

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    Event date： 2014.3

    Language：Japanese   Presentation type：Oral presentation (general)  

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

  • Relative dispersion of trapped ion granulations in sheared flows International conference

    23rd International Toki Conference  2013.11 

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    Event date： 2013.11

    Language：English  

    Country：Japan  

  • How the Propagation of Heat-Flux Modulations Triggers ExB Flow Pattern Formation Invited International conference

    55th Annual Meeting of the APS Division of Plasma Physics  2013.11 

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    Event date： 2013.11

    Language：English   Presentation type：Oral presentation (general)  

    Country：United States  

  • Toroidal momentum transport by trapped ion resonance driven ion temperature gradient driven turbulence International conference

    14th H-mode Workshop on H-mode Physics and Transport Barriers  2013.10 

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    Event date： 2013.10

    Language：English  

    Country：Japan  

  • 熱アバランチの渋滞によるExB流れの構造形成

    小菅 佑輔, P.H. Diamond, O.D. Gurcan, 伊藤 早苗, 伊藤公孝, 稲垣 滋

    日本物理学会　秋季大会  2013.9 

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    Event date： 2013.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：徳島   Country：Japan  

  • How the radial propagation of heat flux modulations triggers ExB flow pattern formation Invited International conference

    Yusuke Kosuga, P.H. Diamond, O.D. Gurcan

    7th Festival de Theorie  2013.7 

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    Event date： 2013.7

    Language：English   Presentation type：Oral presentation (general)  

    Country：France  

  • How the radial propagation of heat flux modulations triggers ExB flow pattern formation International conference

    Yusuke Kosuga, P.H. Diamond, O.D. Gurcan

    3rd Asia Pacific Trasnsport Working Group  2013.5 

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    Event date： 2013.5

    Language：English  

    Country：Korea, Republic of  

  • Density Peaking by Parallel Flow Shear Driven Instability Invited International conference

    Y. Kosuga, S.-I. Itoh, K.Itoh

    24th International T oki Conference on Expanding Horizons of Plasma and Fusion Science through Cross-Fertilization  2014.11 

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    Presentation type：Oral presentation (general)  

    Country：Other  

  • Progress on Transport Modeling by Trapped Ion Resonance Driven Turbulence International conference

    25th IAEA Fusion Energy Conference  2014.10 

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    Country：Russian Federation  

  • Ion Temperature Gradient Driven Turbulence with Strong Precession Resonance Invited International conference

    Y. Kosuga

    4th East Asian School and Workshop on Laboratory, Space, Astrophysical Plasmas  2014.7 

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    Presentation type：Oral presentation (general)  

    Country：China  

  • Summary of Young Researcher Forum Invited International conference

    The 4th Asia Pacific Transport Working Group International Conference  2014.6 

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    Presentation type：Oral presentation (general)  

    Country：Other  

  • Transport Reduction in Ion Temperature Gradient Driven Turbulence with Strong Precession Resonance International conference

    The 4th Asia Pacific Transport Working Group International Conference  2014.6 

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    Presentation type：Oral presentation (general)  

    Country：Other  

  • PANTAにおけるトモグラフィを目指した多チャンネル分光計測

    藤野博充, 藤澤 彰英, 永島 芳彦, 稲垣 滋, 小林達哉, 満薗友宏, 三輪裕大, 高橋宏輔, 大野翔, 武次克哉, 糟谷 直宏, 佐々木 真, 小菅 佑輔, 山田 琢磨, 伊藤 早苗, 伊藤公孝

    プラズマ•核融合学会　第３０回大会  2013.12 

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    Language：Japanese  

    Venue：東京   Country：Japan  

  • 揺動の２次元断面構造の推定法

    山田 琢磨, 稲垣 滋, 小林達哉, 永島 芳彦, 満薗友宏, 三輪裕大, 藤野博充, 佐々木 真, 糟谷 直宏, LESUR MAXIME, 小菅 佑輔, 藤澤 彰英, 伊藤 早苗, 伊藤公孝

    プラズマ•核融合学会　第３０回大会  2013.12 

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    Language：Japanese  

    Venue：東京   Country：Japan  

  • PANTAにおけるイオン温度揺動の評価方法

    中西康介, 稲垣 滋, 小林達哉, 永島 芳彦, 山田 琢磨, 三輪裕大, 糟谷 直宏, 佐々木 真, LESUR MAXIME, 小菅 佑輔, 藤澤 彰英, 伊藤 早苗, 伊藤公孝

    プラズマ•核融合学会　第３０回大会  2013.12 

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    Language：Japanese  

    Venue：東京   Country：Japan  

  • New Method for Evaluation of Ion Temperature Fluctuation in PANTA International conference

    23rd International Toki Conference  2013.11 

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    Language：English  

    Country：Japan  

  • Flow Structure Formation and Control in a Cylindrical Plasma International conference

    14th H-mode Workshop on H-mode Physics and Transport Barriers  2013.10 

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    Language：English  

    Country：Japan  

  • Formation of streamer structures in linear magnetized plasmas International conference

    14th H-mode Workshop on H-mode Physics and Transport Barriers  2013.10 

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    Language：English  

    Country：Japan  

  • PANTAにおけるイオン温度揺動と電位揺動間の位相差の評価

    Inagaki Shigeru, 三輪裕大, 小林達哉, Takuma Yamada, Yoshihiko Nagashima, 満薗友宏, 藤野博充, Makoto Sasaki, Naohiro Kasuya, Maxime Lesur, Yusuke Kosuga, Akihide Fujisawa, SANAE INOUE（論文のみ） ITOH, 伊藤公孝

    日本物理学会　秋季大会  2013.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：徳島   Country：Japan  

  • PANTAにおけるストリーマー構造の形成条件

    山田 琢磨, 稲垣 滋, 小林達哉, 永島 芳彦, 満薗友宏, 三輪裕大, 藤野博充, 佐々木 真, 糟谷 直宏, LESUR MAXIME, 小菅 佑輔, 藤澤 彰英, 伊藤 早苗, 伊藤公孝

    日本物理学会　秋季大会  2013.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Country：Japan  

  • PANTAにおける平行方向速度場揺動の計測

    小林達哉, 満薗友宏, 稲垣 滋, 山田 琢磨, 永島 芳彦, 藤野博充, 三輪裕大, 佐々木 真, 小菅 佑輔, 矢木 雅敏, 糟谷 直宏, 藤澤 彰英, 伊藤 早苗, 伊藤公孝

    日本物理学会　秋季大会  2013.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：徳島   Country：Japan  

  • PANTAにおけるイオン流速および揺動駆動流速の３次元分布の観測

    満薗友宏, 稲垣 滋, 小林達哉, 山田 琢磨, 永島 芳彦, 三輪裕大, 藤野博充, 中西康介, 佐々木 真, 糟谷 直宏, LESUR MAXIME, 小菅 佑輔, 福永航平, 服部元隆, 藤澤 彰英, 伊藤 早苗, 伊藤公孝

    日本物理学会　秋季大会  2013.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：徳島   Country：Japan  

  • Nonlinear electrostatic trapping effects on turbulence, transport and anomalous resistivity

    2012.12 

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    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

  • 中性粒子・乱流プラズマ結合系における流れ分布形成過程

    小菅佑輔、青木大輔

    日本物理学会2020年秋季大会  2020.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：Online  

  • 中性粒子を含むドリフト波乱流における最大エンストロフィー流

    小菅佑輔、青木大輔

    第37回プラズマ核融合学会年会  2020.12 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：Online  

  • How heat flux avalanche jam triggers layering in magnetized plasmas Invited International conference

    Y. Kosuga

    KITP, Layering in Atmospheres, Oceans and Plasmas  2021.2 

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    Language：English   Presentation type：Oral presentation (general)  

  • 階段状分布の形成と輸送特性の重体モデルに基づく解析

    小菅佑輔、古賀大喜、佐々木真

    日本物理学会第76回年次大会  2021.3 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：Online  

  • ドリフトブリーザーの励起による輸送フラックスの変化

    小菅佑輔、稲垣滋、河内裕一

    日本物理学会秋季大会  2022.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Country：Japan  

  • メタステートの起源としてのプラズマ非線形波動励起 Invited

    小菅佑輔

    日本物理学会秋季大会  2022.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Country：Japan  

  • Excitation of nonlinear breathers in magnetzied plasmas Invited International conference

    Y. Kosuga, S. Inagaki, Y. Kawachi

    6th AAPPS  2022.10 

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    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

  • Breather excitation in multi-species fusion plasmas International conference

    Y. Kosuga

    10 th Asia Pacific Transport Working Group  2023.6 

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    Language：English   Presentation type：Oral presentation (general)  

    Country：Korea, Republic of  

  • 複数イオン種を含むプラズマにおけるブリーザーの励起

    小菅佑輔、J. Bourgeois, M. Lesur, 小山一輝

    日本物理学会  2023.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東北大学   Country：Japan  

  • A review of phase space turbulence: Why it is important Invited International conference

    Y. Kosuga

    AAPPS  2023.11 

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    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

  • 球状トカマクにおける誘導電流と自発電流の相互作用

    小菅佑輔

    プラズマ核融合学会  2023.11 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：盛岡   Country：Japan  

  • 核融合プラズマ研究の最近の動向 Invited

    小菅佑輔

    応用物理学会  2024.3 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京都市大学   Country：Japan  

    磁場閉じ込め核融合研究に関する最近の研究動向について報告した。国際熱核融合炉ITERに至る道と現在の状況、最近のスタートアップの参入や研究体制の変化、最近の研究について報告した。

  • 強い捕捉イオン共鳴を伴うイオン温度勾配乱流 Invited

    小菅佑輔

    2014.11 

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    Presentation type：Symposium, workshop panel (public)  

    Venue：Niigata   Country：Other  

  • 平行流を伴うドリフト波乱流 におけるパターン形成と選択

    実験室・宇宙プラズマ研究会「乱流・輸送・粒子加􏰃」  2017.12 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：名古屋   Country：Japan  

  • Role of parallel shear flow in secondary pattern selection problem in drift wave turbulence Invited

    Y. Kosuga

    Plasma Conference 2017  2017.11 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Country：Japan  

  • How parallel shear flow impacts pattern selection in drift wave turbulence Invited International conference

    Y. Kosuga

    9th Festival de Theorie  2017.7 

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    Language：English   Presentation type：Oral presentation (general)  

    Country：France  

  • How turbulence fronts induce plasma spin-up International conference

    Y. Kosuga, S.-I. Itoh, P.H. Diamond, K.Itoh

    7th APTWG International Conference  2017.6 

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    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

  • Evolu&on of convec&ve cell in turbulence driven by parallel flow velocity shear

    Y. Kosuga, S.-I. Itoh, K. Itoh, and M. Sasaki

    JPS 72nd annual mee9ng  2017.3 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Country：Japan  

  • 乱流と磁場方向流れ場との 相互作用に関する研究

    小菅佑輔

    プラズマ核融合学会第33回年会  2016.11 

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：仙台   Country：Japan  

  • Transport of parallel momentum by the triplet correlation in drift wave turbulence International conference

    Y. Kosuga, S.-I. Itoh, P.H. Diamond, K.Itoh

    26th IAEA Fusion Energy Conference  2016.10 

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    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

  • 平行方向流れ場駆動乱流の波数スペクトル時間発展

    小菅佑輔、伊藤早苗、伊藤公孝

    日本物理学会２０１６年秋季大会  2016.9 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：金沢   Country：Japan  

  • Role of granulations in phase space turbulence Invited International conference

    Yusuke Kosuga

    17th International Congress on Plasma Physics  2016.6 

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    Language：English   Presentation type：Oral presentation (general)  

    Country：Taiwan, Province of China  

  • Role of granulations in phase space turbulence Invited International conference

    Yusuke Kosuga

    17th International Congress on Plasma Physics  2016.6 

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    Language：English   Presentation type：Oral presentation (general)  

    Country：Taiwan, Province of China  

  • 実空間・速度空間の統計的揺動を取り込んだプラズマ乱流・輸送

    小菅佑輔

    日本物理学会第７１回年次大会  2016.3 

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    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：東北学院大学   Country：Japan  

  • プラズマ乱流が作り出す平行流れ場構造と密度分布構造

    小菅佑輔

    第３２回プラズマ核融合学会年会  2015.11 

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    Language：Japanese   Presentation type：Symposium, workshop panel (public)  

    Venue：名古屋大学   Country：Japan  

  • プラズマ乱流が作り出す平行流れ場構造と密度分布構造

    小菅佑輔

    第３２回プラズマ核融合学会年会  2015.11 

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    Language：Japanese   Presentation type：Symposium, workshop panel (public)  

    Venue：名古屋大学   Country：Japan  

  • 流体的旋回度を伴うドリフト波乱流による平行運動量輸送

    小菅佑輔、伊藤早苗、P.H. Diamond, 伊藤公孝

    第３２回プラズマ核融合学会年会  2015.11 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：名古屋大学   Country：Japan  

  • 流体的旋回度を伴うドリフト波乱流による平行運動量輸送

    小菅佑輔、伊藤早苗、P.H. Diamond, 伊藤公孝

    第３２回プラズマ核融合学会年会  2015.11 

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    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：名古屋大学   Country：Japan  

  • Turbulence Dynamics with the coupling of density gradient and parallel velocity gradient in the edge plasma International conference

    Y. Kosuga, S.-I. Itoh, K.Itoh

    15th International Workshop on Plasma Edge Theory in Fusion Devices  2015.9 

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    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

  • Inward particle flux driven by parallel flow shear driven instability Invited International conference

    Y. Kosuga

    8th Festival de Theorie  2015.7 

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    Language：English   Presentation type：Oral presentation (general)  

    Country：France  

  • 捕捉イオン乱流の非相関過程

    小菅 佑輔, 伊藤 早苗, P. H. Diamond, 伊藤公孝, LESUR MAXIME

    日本物理学会第70回年次大会  2015.3 

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    Presentation type：Oral presentation (general)  

    Venue：早稲田大学　東京   Country：Other  

  • 非平衡極限—平行速度シアが駆動する密度分布構造形成—

    2014.11 

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    Presentation type：Oral presentation (general)  

    Venue：Niigata   Country：Other  

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MISC

  • Turbulence analysis of linear plasma using multi-channel measurement

    山田琢磨, 菊田航介, 荒川弘之, 佐々木真, 西澤敬之, MOON C., 永島芳彦, 小菅佑輔, 糟谷直宏, 藤澤彰英

    日本物理学会講演概要集(CD-ROM)   79 ( 1 )   2024   （ ISSN:2189-079X ）

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  • Analysis of limit cycle phenomena in Kelvin-Helmholtz turbulence using by multi-field SVD

    古田原拓実, 佐々木真, 河内裕一, 麝嶋祐樹, 小林達哉, 小林達哉, 小菅佑輔, 小菅佑輔, 彌冨豪, 仲田資季, 仲田資季, 仲田資季, 山田琢磨, 山田琢磨, 荒川弘之, 藤澤彰英, 藤澤彰英

    プラズマ・核融合学会年会(Web)   40th   2023

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  • Estimation of normalized electron temperature and electron density fluctuations using emission signal tomography

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

    日本物理学会講演概要集(CD-ROM)   77 ( 2 )   2022   （ ISSN:2189-079X ）

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  • Normalized Electron Temperature and Density Fluctuations measured with Two-wavelength Emission Intensity Tomography

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

    プラズマ・核融合学会年会(Web)   39th   2022

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Professional Memberships

  • American Physical Society

  • 日本物理学会

  • プラズマ核融合学会

  • 日本物理学会

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  • プラズマ核融合学会

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  • American Physical Society

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Committee Memberships

  • 文部科学省 科学技術・学術政策研究所   専門調査委員  

    2024.4 - 2025.3   

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  • Programu Committee  

    2019 - Present   

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  • CD session   Program Committee  

    2019 - Present   

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  • 日本学術振興会   特別研究員等審査会専門委員  

    2019   

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Academic Activities

  • プラズマ核融合学会誌

    2017.7 - 2019.7

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    Type：Academic society, research group, etc. 

  • Screening of academic papers

    Role(s)： Peer review

    2017

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    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：1

  • Discussion Session の座長 International contribution

    （ 名古屋 ） 2016.6

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    Type：Competition, symposium, etc. 

    Number of participants：30

  • 座長

    日本物理学会第７１回年次大会  （ 東北学院大学 ） 2016.3 - Present

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    Type：Competition, symposium, etc. 

    Number of participants：35

  • 日本物理学会第７１回年次大会

    （ 東北学院大学 Japan ） 2016.3

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    Type：Competition, symposium, etc. 

    researchmap

  • Screening of academic papers

    Role(s)： Peer review

    2016

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    Type：Peer review 

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

  • Coordinator of Young Researcher Forum International contribution

    5th APTWG  （ Dalian China ） 2015.6 - 2014.6

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    Type：Competition, symposium, etc. 

    Number of participants：30

  • Chair of Young Researcher Forum International contribution

    4th APTWG  （ Kasuga Japan ） 2014.6

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    Type：Competition, symposium, etc. 

    Number of participants：30

  • Chair of Young Researcher Forum International contribution

    3rd APTWG  （ Jeju Korea ） 2013.5

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    Type：Competition, symposium, etc. 

    Number of participants：30

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Research Projects

  • Understanding plasma turbulence in Hall thrusters

    Grant number：22H00243  2022.4 - 2025.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Grant type：Scientific research funding

    CiNii Research

  • Reduction of heat load on divertor by turbulence and transport

    Grant number：23K20838  2021.4 - 2026.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Grant type：Scientific research funding

    CiNii 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：Principal investigator  Grant type：Scientific research funding

  • 磁力線方向流れを伴うプラズマ乱流におけるパターン形成

    Grant number：18K03578  2018 - 2020

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    小菅 佑輔

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    Authorship：Principal investigator  Grant type：Scientific research funding

    本研究では、乱流プラズマに励起される様々な構造の形成について理解を深め、特に磁力線に沿った流れ場の役割に着目した解析を進めることを目的としている。垂直方向の流れの励起の制御に対して、平行流が有効であることを確認し、単色波の場合に得られた成果を複数の波数と周波数を持つ波からなる波動乱流の場合に研究を拡張した。乱流から三次元的螺旋流が励起されることを示し、その定量化を進めた。

    CiNii Research

  • 磁力線方向流れを伴うプラズマ乱流におけるパターン形成

    2018 - 2020

    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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    Grant type：Scientific research funding

  • 運動論的効果を含むプラズマ乱流混合過程の相図

    Grant number：15K17799  2015 - 2018

    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

  • 核融合科学研究所共同研究

    2014.4 - 2016.3

    核融合科学研究所 

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

    高自律燃焼プラズマ中の輸送の理解に向けたトロイダルプラズマにおける閉じ込め・輸送の体系的研究

  • 磁化不均一プラズマにおける位相空間乱流の研究

    2014 - 2016

    九州大学教育研究プログラム・研究拠点形成プロジェクト

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    Authorship：Principal investigator  Grant type：On-campus funds, funds, etc.

  • 核融合科学研究所LHD計画共同研究

    2013.4 - 2016.3

    核融合科学研究所 

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

    シミュレーションと実験を協調させた多スケール乱流観測手法の開発

  • 捕捉イオン共鳴駆動型位相空間乱流の理論研究

    Grant number：25887041  2013 - 2015

    日本学術振興会  科学研究費助成事業  研究活動スタート支援

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    Authorship：Principal investigator  Grant type：Scientific research funding

  • 位相空間乱流の研究

    2013 - 2015

    テニュアトラック普及事業

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    Authorship：Principal investigator  Grant type：On-campus funds, funds, etc.

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Class subject

  • プラズマ物理Ⅱ

    2023.10 - 2023.12   Fall quarter

  • プラズマ物理Ⅰ

    2023.6 - 2023.8   Summer quarter

  • 物理学の進展Ａ

    2023.4 - 2023.6   Spring quarter

  • プラズマ物理Ⅱ

    2022.10 - 2022.12   Fall quarter

  • 総合理工学修士演習

    2022.4 - 2023.3   Full year

  • 総合理工学修士実験

    2022.4 - 2023.3   Full year

  • 非線形物質運動学演習

    2021.10 - 2022.3   Second semester

  • 非線形物質運動学実験

    2021.4 - 2022.3   Full year

  • 非線形物質運動学演習

    2020.10 - 2021.3   Second semester

  • 非線形物質運動学特論

    2020.10 - 2021.3   Second semester

  • 核融合プラズマ特論

    2020.10 - 2021.3   Second semester

  • 非線形物質運動学実験

    2020.4 - 2021.3   Full year

  • プラズマ概論

    2020.4 - 2020.9   First semester

  • 核融合プラズマ特論

    2019.10 - 2020.3   Second semester

  • 非線形物質運動学演習

    2019.10 - 2020.3   Second semester

  • 非線形物質運動学特論

    2019.10 - 2020.3   Second semester

  • 非線形物質運動学実験

    2019.4 - 2020.3   Full year

  • プラズマ概論

    2019.4 - 2019.9   First semester

  • 非線形物質運動学演習

    2018.10 - 2019.3   Second semester

  • 非線形物質運動学演習

    2018.10 - 2019.3   Second semester

  • 非線形物質運動学特論

    2018.10 - 2019.3   Second semester

  • 非線形物質運動学特論

    2018.10 - 2019.3   Second semester

  • 核融合プラズマ特論

    2018.10 - 2019.3   Second semester

  • 核融合プラズマ特論

    2018.10 - 2019.3   Second semester

  • 核融合プラズマ特論

    2018.10 - 2019.3   Second semester

  • プラズマ概論

    2018.4 - 2018.9   First semester

  • 核融合プラズマ特論

    2017.10 - 2018.3   Second semester

  • 非線形物質運動学演習

    2017.10 - 2018.3   Second semester

  • 非線形物質運動学特論

    2017.10 - 2018.3   Second semester

  • 非線形物質運動学実験

    2017.4 - 2018.3   Full year

  • プラズマ概論

    2017.4 - 2017.9   First semester

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FD Participation

  • 2017.2   Title：九州大学における男女共同参画推進の取り組み

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

  • 2018  核融合科学研究所  Classification:Affiliate faculty  Domestic/International Classification:Japan 

  • 2017  核融合科学研究所  Classification:Affiliate faculty  Domestic/International Classification:Japan 

Outline of Social Contribution and International Cooperation activities

  • APTWG国際学会において、アジア太平洋地域の核融合分野の若手研究者を対象とし、Young Researcher Forumを企画、主催した。

Social Activities

  • 住友商事グループの社員を対象とした核融合に関する入門的なセミナーを行なった。

    住友商事グローバルリサーチ  2022.1

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    Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

    Type：Seminar, workshop

    住友商事のグループの社員を対象とした核融合に関する入門的なセミナーを行なった。

Travel Abroad

  • 2017.5

    Staying countory name 1：Korea, Republic of   Staying institution name 1：Seoul National University

  • 2014.2

    Staying countory name 1：Korea, Republic of   Staying institution name 1：National Fusion Research Institute

  • 2013.11

    Staying countory name 1：United States   Staying institution name 1：University of California, San Diego

  • 2012.8 - 2012.12

    Staying countory name 1：Korea, Republic of   Staying institution name 1：National Fusion Research Institute

  • 2011.1 - 2011.12

    Staying countory name 1：Korea, Republic of   Staying institution name 1：National Fusion Research Institute

  • 2007.9 - 2012.6

    Staying countory name 1：United States   Staying institution name 1：University of California, San Diego

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