Updated on 2025/04/30

写真a

 
IDEI HIROSHI
 
Organization
Research Institute for Applied Mechanics Advanced Fusion Research Center Professor
Interdisciplinary Graduate School of Engineering Sciences Department of Interdisciplinary Engineering Sciences(Concurrent)
School of Engineering (Concurrent)
Title
Professor
Profile
Noni-inductive plasma current start-up and sustainment have been studied on Spherical Tokamak (ST) QUEST plasmas in Advanced Fusion Research Center. Stet-up of Center Solenoid (CS) coils used for inductive plasma start-up is difficult in the ST devices due to the limited area. Advanced fusion reactor design beyond the ST type has been optimized to reduce the CS part. Noni-inductive plasma current start-up and sustainment is one of most important issues in fusion development. In order to sustain high density plasma, incident electromagnetic waves should be sometimes converted into electrostatic waves in the plasma. Plasma diagnostics on density and emission measurements to study the wave-conversion process has been engaged. In plasma diagnostics, remote-sensing technique is used. Some collaborations have been conducted with different fields. RF or millimeter-wave components have been developed for the remote-sensing and plasma heating and current drive in high temperature plasmas. I have education activities on the plasma heating using radio frequency at Advanced Energy Engineering Science, Interdisciplinary Graduate School of Engineering Sciences.
External link

Research Areas

  • Energy Engineering / Nuclear fusion

  • Energy Engineering / Fundamental plasma

  • Energy Engineering / Applied plasma science

Degree

  • Dr. of Science

Research History

  • Kyushu University Research Institute for Applied Mechanics Advanced Fusion Research Center  Professor 

    2007.3 - Present

  • - 九州大学応用力学研究所炉心理工学研究センター 助教授   

    2003

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  • Kyushu University 応用力学研究所  

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Research Interests・Research Keywords

  • Research theme: Plasma Start-up and Sustainment using High Power Millimeter Waves

    Keyword: Gyrotron, Plasma Current Start-up

    Research period: 2014.4

  • Research theme: Development of Fast directional switch system in millimeter wave transmission.

    Keyword: FADIS, NTM

    Research period: 2012.4

  • Research theme: Propagating mode analysis and diagnostics development in high-power millimeter wave transmission lines.

    Keyword: Circular Corrugated Waveguide

    Research period: 2009.4

  • Research theme: Development of high-purity HE11-mode exciter

    Keyword: Circular Corrugated Waveguide

    Research period: 2009.4

  • Research theme: Electron Bernstein Wave Heating and Current Drive Experiments in QUEST

    Keyword: Electron Bernstein Wave, QUEST, RF Heating, Current Drive

    Research period: 2008.4

  • Research theme: Density Profile and Fluctuation Measurements in Reflectometry on the QUEST

    Keyword: QUEST, Reflectometry, Density fluctuation

    Research period: 2008.4

  • Research theme: Electron Bernstein Wave Emission Diagnostics in QUEST

    Keyword: QUEST, Electron Bernstein Wave, Radiometer

    Research period: 2008.4

  • Research theme: Diagnostics using Electromagnetic wave in CPD Experiments

    Keyword: Electron Bernstein Wave, CPD, Reflectometry, Radiometer

    Research period: 2006.4 - 2009.3

  • Research theme: Electron Bernstein Wave Heating and Current Drive Experiments in CPD

    Keyword: Electron Bernstein Wave, CPD, RF Heating, Current Drive

    Research period: 2006.4 - 2008.3

  • Research theme: Development of New Antenna System for Electron Bernstein Heating and Current Drive in QUEST

    Keyword: Electron Bernstein Wave, QUEST , RF Heating, Current Drive

    Research period: 2006.4

  • Research theme: Electron Cyclotron Heating / Current Drive Experiments using Remote Steering Antenna

    Keyword: Remote Steering Antenna, Electron Cyclotron Heating, Electron Cyclotron Current Drive

    Research period: 2003.4 - 2006.3

  • Research theme: Electron Temperature and Velocity Distribution Function Diagnostics based on Electron Cyclotron Emission

    Keyword: Electron Cyclotron Emission, Electron Temperature Profile, Electron Velocity Distribution Function

    Research period: 2003.4

  • Research theme: Evolution of Full Stokes Parameters in Polarized Radiative Transfer of Electron Cyclotron Wave

    Keyword: electron cyclotron waves, wave polarization, Stokes parameters, dichroism, birefringence

    Research period: 1998.4 - 2003.3

  • Research theme: Development of mm-Wave Transmission Components based on Precise Phase Measurements

    Keyword: phase measurement, millimeter waves, transmission components

    Research period: 1998.4

Awards

  • JT-60共同研究優秀賞

    2023.11   国立研究開発法人 量子科学技術研究開発機構   JT-60SA用マイクロ波ドップラー反射計のビームステアリング機能付アンテナ適用に向けた研究 (研究協力者)

  • プラズマ・核融合学会賞 第27回技術進歩賞

    2022.9   プラズマ・核融合学会   先進核融合装置プラズマ加熱用低周波数ジャイロトロンの開発研究

  • プラズマ・核融合学会賞 第4回論文賞

    1996.3   プラズマ・核融合学会   論文「トーラスプラズマ中の電場とその空間構造を決定する物理機構」に関する論文賞

Papers

  • 8.56-GHz quasi-optical launcher system with incident-mode selectivity on the QUEST spherical tokamak Reviewed International journal

    H. Idei , M. Sakaguchi , K. Mishra , T. Onchi , R. Ikezoe , O. Watanabe , Y. Tanaka , T. Saito , T. Ido , K. Hanada 

    Fusion Engineering and Design   2023.4

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

    An 8.56-GHz quasi-optical launcher system with incident-mode selectivity was developed for non-inductive electron cyclotron (EC) plasma ramp-up and long-pulse sustainment, and effective bulk-electron heating on the Q-shu University experiment with steady-state spherical tokamak (QUEST). A novel polarization-selective system was proposed to conduct fundamental and second harmonic EC heating and current drive experiments with ordinary and extra-ordinary mode waves, respectively. Selectivity of the incident modes or polarizations was confirmed using the whole developed system at a low power level. A large-sized mirror launcher was developed to inject the beam whose size was as small as possible near the QUEST major radius. The designed mirror performance was checked using a three-dimensional electromagnetic-wave simulator and a low-power test. Ultimately, 0.15-m sized beams for both the two polarizations were successfully attained near the QUEST major radius, even in low-frequency applications with long propagation.

    DOI: https://doi.org/10.1016/j.fusengdes.2023.113479

    Repository Public URL: https://hdl.handle.net/2324/7177953

  • Adaptive Capon beamforming for lensless electron cyclotron emission imaging with high spatial resolution Reviewed International journal

    H. Idei, M. Fukuyama, S. Sakai, K. Mishra, K. Nishimura, R. Ikezoe, T. Onchi, T. Ido

    Review of Scientific Instruments   2022.10

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

    Electron cyclotron emission (ECE) imaging diagnostics incorporating a lensless approach have been developed for measurements involving active spatial selectivity and direction-of-arrival estimation. The Capon method for adaptive-array analysis was proposed to improve the spatial resolution of the two-dimensional ECE imaging technique. Broadband noise source emissions were used to simulate the ECE to verify the practical effectiveness of the Capon method in the ECE imaging. Multiple noise source emission positions were properly estimated with a high spatial resolution using the Capon method.

    DOI: https://doi.org/10.1063/5.0101632

    Repository Public URL: https://hdl.handle.net/2324/7174490

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

    Idei, Hiroshi; Onchi, Takumi; Mishra, Kishore; Zushi, Hideki; Kariya, Tsuyoshi; Imai, Tsuyoshi; Watanabe, Osamu; Ikezoe, Ryuya; Hanada, Kazuaki; Ono, Masayuki; ejiri, akira; Qian, Jinping; Nakamura, K; Fujisawa, Akihide; Nagashima, Yoshihiko; Hasegawa, Makoto; Matsuoka, Keisuke; Fukuyama, Atsushi; Kubo, Shin; Yoshikawa, M; Sakamoto, Mizuki; Kawasaki, Shoji; Higashijima, Aki; Ide, Shunsuke; Takase, Yuichi; Murakami, Sadayoshi

    Nuclear Fusion   Volume 60 ( Number 1 )   2019.12

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

    A 28 GHz system with a high-power gyrotron tube has been used for the QUEST spherical tokamak to form an over-dense plasma for electron Bernstein wave (EBW) heating and current drive with an 8.2 GHz-wave. Non-inductive high-density plasma ramp-up experiments with dual-frequency (dual-f ) electron cyclotron (EC) (8.2 GHz and 28 GHz) waves were conducted. A spontaneous density jump (SDJ) to an over-dense state was first observed as a bifurcation phenomenon in the dual-f  wave experiment. The over-dense plasma on the 8.2 GHz wave was non-inductively ramped up to 25 kA, and was maintained for 0.4 s under stable plasma equilibrium after two such jumps in one shot. Heating to mildly energetic electrons and bulk electrons was observed even in the over-dense region. The electrostatic EBW heating effect on the mildly energetic electrons in the over-dense region is assessed following a dispersion analysis of the 8.2 GHz wave. The bulk electron heating effect observed is explained as heat exchange from mildly energetic electrons heated by the electrostatic EBW. Remarkably, a high hard-x-ray-radiation temperature of  ~500 keV was also observed in tangential viewing for current-carrying electrons in the over-dense core region. Synergetic heating from the overlap of different 28 GHz EC harmonic resonances as well as higher harmonic heating is discussed for maintaining the highly energetic electrons in the over-dense core region. In addition, the SDJ process and mechanism are considered based on the discussion of the electron heating effects with the 8.2 GHz wave.

    DOI: https://doi.org/10.1088/1741-4326/ab4c12

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

    H. Idei, T. Onchi, T. Kariya, T.I. Tsujimura, S. Kubo, S. Kobayashi, M. Sakaguchi, T. Imai, M. Hasegawa, K. Nakamura, K. Mishra, M. Fukuyama, M. Yunoki, S. Kojima, O. Watanabe, K. Kuroda, K. Hanada, Y. Nagashima, A. Ejiri, N. Matsumoto, M. Ono, A. Higashijima, T. Nagata, S. Shimabukoro, Y. Takase, A. Fukuyama, S. Murakami

    Fusion Engineering and Design   2019.2

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

    New polarizer and launcher systems on a 28-GHz electron-cyclotron (EC) heating and current drive (HCD) system have been developed for non-inductive second-harmonic EC-plasma-current ramp-up in the QUEST spherical tokamak. A launcher system with two quasi-optical mirrors providing beam steering capability was designed to focus the incident beam to a small-sized waist of ∼0.05 m at the second-harmonic EC resonance layer. A relatively large focusing mirror was designed based on a Kirchhoff integral code developed to derive wave solutions. The focusing property of the launched beam was first confirmed with a 3-dimensional (3D) electromagnetic-wave simulator. Focusing characteristics were also checked at low-power test facilities, together with the steering capability. The performance of this launcher system was demonstrated to work as designed, and assembled in the QUEST device. The system was applied to the non-inductive second-harmonic EC plasma ramp-up experiments with no optimization required regarding the incident polarization. The results obtained for the non-inductive plasma ramp-up are also presented.

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

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

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

    Nuclear Fusion   57 ( 12 )   2017.10

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

    Fully non-inductive second (2nd) harmonic electron cyclotron (EC) plasma current ramp-up was demonstrated with a newlly developed 28 GHz system in the QUEST spherical tokamak. A high plasma current of 54 kA was non-inductively ramped up and sustained stably for 0.9 s with a 270 kW 28 GHz wave. A higher plasma current of 66 kA was also non-inductively achieved with a slow ramp-up of the vertical field. We have achieved a significantly higher plasma current than those achieved previously with the 2nd harmonic EC waves. This fully non-inductive 2nd harmonic EC plasma ramp-up method might be useful for future burning plasma devices and fusion reactors, in particular for operations at half magnetic field with the same EC heating equipment.

    DOI: 10.1088/1741-4326/aa7c20

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Presentations

  • Ray Trace and Fokker-Plank Analyses for Electron Bernstein Wave Heating and Current Drive on QUEST International conference

    H. Idei, N. Takeuchi, S. Kubo, A. Fukuyama, H. Nuga, M. Sakaguchi, N. Nakamura, K. Hanada, H. Zushi, K. N. Sato, M. Sakamoto, M. Hasegawa, Y. Takase, O. Mitarai, T. Maekawa and Y. Kishimoto

    International Congress on Plasma Physics 2008  2008.9 

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    Event date: 2008.9

    Presentation type:Oral presentation (general)  

    Venue:福岡国際会議場   Country:Japan  

    Other Link: www.triam.kyushu-u.ac.jp/ICPP

  • QUEST装置用電子バーシュタイン波加熱・電流駆動アンテナシステムの開発

    出射浩、坂口政嗣、田中靖正、 川口穣、 伊藤哲、花田和明, 図子秀樹、吉永智一、伊神弘恵、佐藤浩之助、 中村一男、 坂本瑞樹、 長谷川真、川崎昌二、中島寿年、東島亜紀、CPD/QUEST グループ

    プラズマ核融合学会第24回年会  2007.11 

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    Event date: 2007.11

    Presentation type:Oral presentation (general)  

    Venue:イーグル姫路   Country:Japan  

    Development of Launcher System for Electron Bernstein Wace Heating and Current Drive in QUEST

  • LHD における広帯域高速周波数スイッチング ECE ラジオメーターシステム

    出射浩、稲垣滋、川崎昌二、長山好夫、川端一男、下妻隆、図子秀樹

    プラズマ核融合学会第24回年会  2007.11 

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    Event date: 2007.11

    Presentation type:Oral presentation (general)  

    Venue:イーグル姫路   Country:Japan  

    Broadband radiometer system with fast frequency switching synthesizer for electron cyclotron emission measurements in LHD

  • CPD 装置におけるAM 反射計計測

    出射浩、綿谷祐一, 河野修平, 銅野皓介, 松原真仁, 川崎昌二, 花田和明, 図子秀樹, 吉永智一, 佐藤浩之助, 坂本瑞樹、長谷川真、中島寿年、東島亜紀、CPD 実験グループ

    プラズマ核融合学会第24回年会  2007.11 

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    Event date: 2007.11

    Presentation type:Oral presentation (general)  

    Venue:イーグル姫路   Country:Japan  

    AM reflectometer in CPD

  • 放射電界を用いた円形コルゲート導波管伝播モードの解析

    出射浩、M.Shapiro、R.J.Temkin、下妻隆、久保伸、野竹孝志

    プラズマ核融合学会第24回年会  2007.11 

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    Event date: 2007.11

    Presentation type:Oral presentation (general)  

    Venue:イーグル姫路   Country:Japan  

    Mode Content Analysis in Circular Corrugated Waveguide using Radiated Field

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MISC

  • 電磁波を用いたプラズマ診断の基礎と最前線 4.ITER実験での課題と新たな取り組み 4.2電子サイクロトン放射計測での問題点と新たな取り組み

    出射浩

    プラズマ・核融合学会   2011.8

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    Language:Japanese  

  • 燃焼・高ベータプラズマの実現に向けたプラズマ分布制御の課題

    出射浩

    Journal of Plasma and Fusion Research 小特集,536-540   2010.1

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    Language:Japanese  

Professional Memberships

  • プラズマ・核融合学会

  • 日本物理学会

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Committee Memberships

  • 一般社団法人プラズマ・核融合学会   Organizer   Domestic

    2024.7 - 2026.9   

  • 一般社団法人プラズマ・核融合学会   第15回核融合エネルギー連合講演会 プログラム委員会委員   Domestic

    2023.9 - 2024.12   

  • 一般社団法人プラズマ・核融合学会   九大筑紫地区 支部役員   Domestic

    2020.7 - Present   

  • 一般社団法人プラズマ・核融合学会   Executive   Domestic

    2020.7 - 2024.6   

  • 一般社団法人プラズマ・核融合学会   プラズマ・核融合学会誌・副編集長   Domestic

    2020.7 - 2024.6   

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Academic Activities

  • 実行委員長

    プラズマ・核融合学会 九州・沖縄・山口支部 第26回支部大会  ( Japan ) 2022.12

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    Type:Competition, symposium, etc. 

  • プラズマ・核融合学会誌(Journal of Plasma and Fusion Reserch)

    2022.7 - 2024.6

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    Type:Academic society, research group, etc. 

  • 座長(Chairmanship)

    第38回 プラズマ・核融合学会 年会  ( Japan ) 2021.11

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    Type:Competition, symposium, etc. 

  • 座長(Chairmanship)

    第37回 プラズマ・核融合学会 年会  ( Japan ) 2020.12

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    Type:Competition, symposium, etc. 

  • プラズマ・核融合学会誌(Journal of Plasma and Fusion Reserch)

    2020.7 - 2022.6

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    Type:Academic society, research group, etc. 

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Research Projects

  • 核融合炉の早期実現に向けた球状トカマク研究

    2025.4 - 2028.3

    Joint research

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    Authorship:Principal investigator  Grant type:Joint research

  • 球状トカマクでのプラズマ加熱・粒子循環制御の研究

    2024.4 - 2025.3

    Joint research

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    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • 大電力ダイプレクサの開発試験

    2024.2 - 2025.3

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    Authorship:Principal investigator 

  • 球状トカマクでのプラズマ加熱・粒子循環制御の研究

    2023.4 - 2024.3

    Joint research

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    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

  • 28GHz定常・大電力ジャイロトロン管を用いた電子サイクロトロン加熱による高電子温度・高電流プラズマ立ち上げ

    2022.4 - 2023.3

    Joint research

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    Authorship:Principal investigator  Grant type:Other funds from industry-academia collaboration

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Educational Activities

  • I have a main education activity at Interdisciplinary Graduate School of Engineering Sciences, Kyushu University. I have series lectures on plasma wave with the emphasis of fundamental aspects. In RF heating on nuclear fusion research, deep understanding wave dynamics in plasmas is required. Studies on waves dynamics in plasmas is also important for experiments with laboratory plasmas. I have a seminar and an experimental course too.

Class subject

  • プラズマ特論Ⅰ

    2024.6 - 2024.8   Summer quarter

  • 総合理工学修士実験

    2024.4 - 2025.3   Full year

  • 総合理工学セミナーD

    2024.4 - 2025.3   Full year

  • 総合理工学修士演習

    2024.4 - 2025.3   Full year

  • プラズマ特論Ⅰ

    2023.6 - 2023.8   Summer quarter

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FD Participation

  • 2023.12   Role:Participation   Title:応用力学研究所メンタルヘルスFD 学生のメンタルヘルス-初期対応と学内連携-

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

  • 2022.6   Role:Participation   Title:応用力学研究所FD 九州大学ハラスメント対策推進室の研修

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

  • 2019.10   Role:Participation   Title:応用力学研究所FD 九州大学ハラスメント相談室の研修

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

  • 2004.2   Role:Participation   Title:総合理工学府FD「安全教育の仕方」講演会

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

  • 2003.4   Role:Participation   Title:新任教官の研修

    Organizer:University-wide

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

  • 2011  自然科学研究開発機構核融合科学研究所  Classification:Affiliate faculty  Domestic/International Classification:Japan 

Other educational activity and Special note

  • 2005  Class Teacher  全学

  • 2004  Class Teacher  全学

Social Activities

  • 平成26年度文部科学省研究大学強化促進事業 九州大学テクノロジーフォーラム2014 「位相測定・制御によるミリ波・マイクロ波要素機器の開発」

    九州大学  東京国際フォーラム  2014.12

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

    Type:Lecture

  • 平成25年度九州大学(大学院総合理工学府)公開講座 最先端・次世代プラズマ科学-万物流転の法則から医療滅菌まで- 「プラズマとエネルギー開発」

    九州大学(大学院総合理工学府)  九州大学筑紫キャンパス総合研究棟3階講義室  2013.8

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

    Type:Lecture

  • 球状トカマク:QUEST装置における定常プラズマ研究への取り組み

    九州大学応用力学研究所  九州大学筑紫キャンパス 総合研究棟 筑紫ホール  2008.6

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

    Type:Lecture

  • 産業科学体験教室

    九州国際大学付属中学校  2007.7

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    Audience:Infants, Schoolchildren, Junior students, High school students

    Type:Other

Activities contributing to policy formation, academic promotion, etc.

  • 2025.4 - 2026.3   国立研究開発法人 量子科学技術研究開発機構

    原型炉設計合同特別チーム メンバー

  • 2025.4 - 2026.3   国立研究開発法人 量子科学技術研究開発機構

    令和7年度核融合炉工学研究委員会委員

  • 2025.1 - 2026.12   国立研究開発法人 量子科学技術研究開発機構

    量子エネルギー研究開発評価委員会委員

  • 2024.6 - 2025.3   国立研究開発法人 量子科学技術研究開発機構

    炉心プラズマ共同企画委員会 プラズマ実験・システム開発専門部会専門委員

  • 2024.4 - 2025.3   国立研究開発法人 量子科学技術研究開発機構

    原型炉設計合同特別チーム メンバー

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Acceptance of Foreign Researchers, etc.

  • Princeton Plasma Physics Laboratory

    Acceptance period: 2024.1   (Period):Less than 2 weeks

    Nationality:United States

    Business entity:On-campus funds

  • Princeton Plasma Physics Laboratory

    Acceptance period: 2024.1   (Period):Less than 2 weeks

    Nationality:United States

    Business entity:On-campus funds

  • Princeton Plasma Physics Laboratory

    Acceptance period: 2023.11   (Period):Less than 2 weeks

    Nationality:United States

    Business entity:On-campus funds

  • Princeton Plasma Physics Laboratory

    Acceptance period: 2023.1   (Period):Less than 2 weeks

    Nationality:United States

    Business entity:On-campus funds

  • Princeton Plasma Physics Laboratory

    Acceptance period: 2023.1   (Period):Less than 2 weeks

    Nationality:United States

    Business entity:On-campus funds

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Travel Abroad

  • 2019.9

    Staying countory name 1:United States   Staying institution name 1:Princeton Plasma Physics Laboratory, Princeton University

  • 2018.10

    Staying countory name 1:India   Staying institution name 1:Mahatma Mandir Convention and Exhibition Center Ahmedabad, India

  • 2017.9

    Staying countory name 1:United States   Staying institution name 1:Doubletree Suites by Hilton Hotel, Santa Monica 1707 4th St., Santa Monica, CA

  • 2014.10

    Staying countory name 1:Russian Federation   Staying institution name 1:Park Inn by Radisson Pribaltiyskaya Hotel

  • 2014.9

    Staying countory name 1:United States   Staying institution name 1:アメリカ アリゾナ州 セドナ セドナルージュ ホテル&スパ

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