2次元画像比較を駆使した超高磁場リコネクションの巨大加熱・加速の解明と応用開拓

2015 Fiscal Year Annual Research Report

• Project/Area Number: 15H05750
• Research Institution: The University of Tokyo
• Principal Investigator: 小野 靖 東京大学, 大学院新領域創成科学研究科, 教授 (30214191)
• Co-Investigator(Kenkyū-buntansha): 井 通暁 東京大学, 大学院新領域創成科学研究科, 准教授 (00324799) ; 田辺 博士 東京大学, 大学院新領域創成科学研究科, 助教 (30726013) ; 清水 敏文 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 准教授 (60311180) ; 原 弘久 国立天文台, SOLAR-C準備室, 准教授 (20270457)
• Project Period (FY): 2015-05-29 – 2020-03-31
• Keywords: 磁気リコネクション / 高磁場プラズマ合体 / イオン加速・加熱 / 電子加速・加熱 / ２次元画像比較 / ２次元イオンドップラー計測 / ２次元トムソン散乱計測 / リコネクション応用開拓

Outline of Annual Research Achievements

初年度は，合体トカマクのポロイダル磁場向上のためのコイル系，電源系に加え，計測系のインフラ作りが急進展した。内側内部コイル設置が生成効率を10％上げる点を見出し，コイル系，電源系に反映させ，電源系も所有の16kV, 0.4MJに加え，40kV, 20kV, 10kVの合計1MJのコンデンサーを他機関から取得し，総エネルギー1.4MJのシステムを自作した。ポロイダルコイル6基もケーブル巻線製から銅ロッド製に組み直し，力学性能が格段に向上した。トロイダルコイルも強化，平衡磁場コイル電源も高エネルギー密度の電気二重層型コンデンサーを採用・自作し，0.5Tを越える高ポロイダル磁場を得る見通しがついた。
2次元高精細計測の整備も，従来7×5点であったドップラートモグラフィー型イオン温度計測をまず32×10点，次に32×16点に高精細化してＸ点下流のイオン加熱領域の傾きを実測した他，16×n点の2次元システム構築ための16点のトムソン散乱計測を成功させ，X点にピークした電子温度分布を見出し，粒子シミュレーションや太陽観測と一致することを報告した。
以上の成果は内外の注目を集め，日本政府主催のInternational Cool Earth Forumで小野が核融合セッション講演を任されたほか，米国物理学会年会，球状トカマク国際会議, ISSS国際会議，IPELS2015国際会議，MR2016・MR2017国際会議，韓国物理学会等の招待講演，Physics of Plasma誌招待論文，新聞報道2回，英国チャンネル4のTV放映，ドップラートモグラフィー計測に対するプラズマ核融合学会の学術奨励賞も受賞し，内外から評価されている。リコネクション加熱は核融合ベンチャー企業の次期装置で採用されて応用開拓も急進展し，以上の成果を中心にMR2017国際会議を松山市において主催し，盛況であった。

Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

初年度，高磁場実験開始のため，内側ポロイダルコイルを設置してプラズマ生成効率が10%向上したほか，外部からコンデンサー移設とシステム自作により，計画を大幅に上まわる1.4MJのコンデンサー電源の完成，ポロイダルコイルをすべて銅ロッドで再構成して力学強度を大幅に強化したことは大きな成果である。
目玉のドップラートモグラフィー型イオン温度計測の500チャンネル化，レーザの往復反射で16×n点に拡張できるトムソン散乱型電子温度・密度計測の16チャンネル化を成功させ，研究は急進展した。コイルのポロイダル磁場も0.5kGを上まわったため，現在，0.02Tから徐々にポロイダル磁場を上昇させながら，イオン，電子の加速・加熱特性の検証を進め，粒子シミュレーションや太陽観測と比較して成果をあげている。特にガイド磁場に起因するホール効果によってX点下流のイオン加熱領域がねじれる効果や，X点に強くピークした電子温度分布，それを説明するX点付近の電界効果等々，物理的な発見があり，それぞれ学会の招待講演として評価されている。
本研究に対する学会での注目度は高く，これまでに日本政府主催のICEF会議の核融合セッションを任された（招待講演）他，招待講演23件，招待論文2件，新聞報道2件，海外ＴＶ放映1件があり，計画以上の成果といえる。東大独自のドップラー型2次元イオン温度計測も評価され，プラズマ核融合学会の授賞，招待講演となった他，依頼により，本研究の一連の成果を中心に据えたMR2017国際会議の松山市において主催したことから，当初計画を上まわる成果をあげたと判断できる。応用開拓でもリコネクション加熱による核融合炉点火のアイデアが英国ベンチャー企業Tokamak Energy社が数億円をかける次期プロジェクトST-40実験に採用され，東京大学のプラン・技術支援がはじまり，実用化も新しい展開につながった。

Strategy for Future Research Activity

これまで合体実験の高磁場化のインフラ作りを遂行した結果，計画を上まわるコンデンサー電源，ポロイダルコイル系を整備，高効率の合体プラズマ生成も可能になった。計測の目玉の2次元ドップラー型高精細イオン温度計測の整備は計画以上に進んでいる。
既に成果は多数の招待講演，論文やプラズマ核融合学会学術奨励賞や会議主催につながったので，今後は更に１）2次元計測の500点を超える高精細化によるイオンラーマ半径程度の分解能の確保，さらに2)温度計測を粒子速度計測に拡張して高エネルギー粒子の検出につなげ，３）粒子シミュレーションや太陽衛星観測との比較を本格化していく予定である。特に受賞したベクトルトモグラフィー型のイオン温度・流速計測の内，難易度の高いイオン流速計測をチャンネル数の増加によって本格化させる。トムソン散乱の拡張による非等方温度の計測とX線計測による電子加速の検出にも注力し，ポロイダル磁場を従来の0.02Tの低磁場側から徐々に引き上げて検出を容易にする予定である。
また，４）東京大学の実験担当者を核融合科学研究所の粒子シミュレーショングループに派遣し，シミュレーション自体を実験と直接比較可能なものに代えて同じ土俵での2次元比較を可能にし，５）太陽観測もドップラー計測，X線計測，磁場計測（マグネトグラム）に注目し，観測・実験担当者が宇宙科学研究所，国立天文台，東京大学を相互訪問して，実験・観測との2次元比較を行う予定である。
応用開拓は東大のアイデアであるリコネクション加熱の核融合点火への応用を中心に英国ベンチャーTokamak Energy社とも協力して計画を進める予定である。

Research Products

• [Int'l Joint Research] プリンストン大学/プリンストンプラズマ物理研究所(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: プリンストン大学/プリンストンプラズマ物理研究所
  • # of Other Institutions: 2
• [Int'l Joint Research] カラム研究所/トカマクエナジー研究所(英国)
  • Country Name: UNITED KINGDOM
  • Counterpart Institution: カラム研究所/トカマクエナジー研究所
  • # of Other Institutions: 2
• [Int'l Joint Research] 国立成功大学(台湾)
  • Country Name: その他の国・地域
  • Counterpart Institution: 国立成功大学
  • # of Other Institutions: 1
• [Int'l Joint Research]
  • # of Other Countries: 3
• [Journal Article] Energy Conversion Mechanism for Electron Perpendicular Energy in High Guide-Field Reconnection (2017)
  • Author(s): X. Guo, R. Horiuchi, C. Z. Cheng, Y. Kaminou and Y. Ono
  • Journal Title: Physics of Plasmas Volume: 24 Pages: 032901
  • DOI: 10.1063/1.4977908
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Numerical study of Hall effects on counter-helicity spheromak merging by twodimensional Hall-MHD simulations (2017)
  • Author(s): Yasuhiro Kaminou, Xuehan Guo, Michiaki Inomoto, Yasushi Ono, and Ritoku Horiuchi
  • Journal Title: Physics of Plasmas Volume: 24 Pages: 032508
  • DOI: 10.1063/1.4978785
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Investigation of Merging/reconnection Heating during Solenoid-free Startup of Plasmas in the MAST Spherical Tokamak (2017)
  • Author(s): H. Tanabe, T. Yamada, K. Gi, T. Watanabe, M. Inomoto, R. Imazawa, M. Gryaznevich, R. Scannell, N. Conway, C. Michael, B. Crowley, I. Fitzgerald, A. Meakins, N. Hawkes, K. McClements, J. Harrison, T. O'Gorman, C. Z. Cheng, Y. Ono
  • Journal Title: Nuclear Fusion Volume: 57 Pages: 056037
  • DOI: 10.1088/1741-4326/aa6608
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Recent progress of magnetic reconnection research in the MAST spherical tokamak (Invited) (2017)
  • Author(s): H. Tanabe, T. Yamada , T. Watanabe , K. Gi , M. Inomoto , R. Imazawa , M. Gryaznevich , C. Michael , B. Crowley , N. J. Conway , R. Scannell , J. R. Harrison , I. Fitzgerald , A. Meakins , N. C. Hawkes , K. G. McClements , T, O Gorman , C,Z. (Frank) Cheng , Y. Ono , the MAST team
  • Journal Title: Physics of Plasmas Volume: 24 Pages: 056108
  • DOI: 10.1063/1.4977922
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Reconnection Heating Experiments and Simulations for Torus Plasma Merging Startup (2016)
  • Author(s): Y. Ono, T. Yamada, S. Inoue, M. Inomoto, C. Z. Cheng, M. Gryaznavich, R. Scannell, N. J. Conway, B. Crowley, C. Michael, H. Hara, S. Usami and R. Horiuchi
  • Journal Title: Fusion Energy 2016 Volume: 1 Pages: EX/P3-38 (8pp)
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Localized electron heating during magnetic reconnection in MAST (2016)
  • Author(s): T. Yamada, H. Tanabe, T.G. Watanabe, Y. Hayashi, R. Imazawa, M. Inomoto, Y. Ono, M. Gryaznevich, R. Scannell, C. Michael and The MAST Team
  • Journal Title: Nuclear Fusion Volume: 56 Pages: 106019
  • DOI: 10.1088/0029-5515/56/10/106019
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 異極性プラズマ合体におけるイオン温度とイオンフロー (2016)
  • Author(s): 桑波田晃弘，神納康宏，矢内亮馬，井通暁，小野靖
  • Journal Title: 電気学会論文誌 A Volume: 136 Pages: 212. 213
  • DOI: 10.1541/ieejfms.136.21
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Application of Tomographic Ion Doppler Spectroscopy to Merging Plasma Startup in the MAST Spherical Tokamak (2016)
  • Author(s): H. Tanabe, T. Yamada, T. Watanabe, K. Gi, K. Kadowaki, M. Inomoto, R. Imazawa, M. Gryaznevich, R. Scannell, N. J. Conway, B. Crowley, K. G. McClements, I. Fitzgerald, C. Michael, J. Harrison, A. Meakins, N. Hawkes, T. O’Gorman, C. Z. Cheng, Y. Ono, and the MAST Team
  • Journal Title: Plasma and Fusion Research Volume: 11 Pages: 1302093
  • DOI: 10.1585/pfr.11.1302093
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Investigation of Merging/reconnection Heating during Solenoid-free Startup of Plasmas in the MAST Spherical Tokamak (2016)
  • Author(s): H. Tanabe, T. Yamada, K. Gi, T. Watanabe, K. Kadowaki, M. Gryaznevich, R. Scannell, N. J. Conway, C. Michael, B. Crowley, J. Harrison, I. Fitzgerald, A. Meakins, N. Hawkes, K. G. McClements, T. O’Gorman, C. Z. Cheng and the MAST team
  • Journal Title: Fusion Energy 2016 Volume: 1 Pages: EX/P4-32 (8pp)
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] High Power Heating of Magnetic Reconnection in Merging Tokamak Experiments (Invited) (2015)
  • Author(s): Y. Ono, H. Tanabe, T. Yamada, K. Gi, T. Watanabe , T. Ii, M. Gryaznevich, R. Scannell, N. Conway, B. Crowley, C. Michael
  • Journal Title: Physics of Plasmas Volume: 22 Pages: 55708
  • DOI: 10.1063/1.4920944
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Electron and Ion Heating Characteristics during Magnetic Reconnection in the MAST Spherical Tokamak (2015)
  • Author(s): H. Tanabe, T. Yamada, T. Watanabe, K. Gi, K. Kadowaki, M. Inomoto, R. Imazawa, M. Gryaznevich, C. Michael, B. Crowley, N. J. Conway, R. Scannell, J. Harrison, I. Fitzgerald, A. Meakins, N. Hawkes, K. G. McClements, T. O’Gorman, C. Z. Cheng, Y. Ono and The MAST Team
  • Journal Title: Physical Review Letters Volume: 115 Pages: 215004
  • DOI: 52.35.Vd, 52.55.Fa, 52.72.+v
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Centre-solenoid-free merging start-up of spherical tokamak plasmas in UTST (2015)
  • Author(s): M. Inomoto, T.G. Watanabe, K. Gi, K. Yamasaki, S. Kamio, R. Imazawa, T. Yamada, X. Guo, T. Ushiki, H. Ishikawa, H. Nakamata, N. Kawakami, T. Sugawara, K. Matsuyama, K. Noma, A. Kuwahata and H. Tanabe
  • Journal Title: Nuclear Fusion Volume: 44 Pages: 33013
  • DOI: 10.1088/0029-5515/55/3/033013
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Conceptual design of the moderateoderate size superconducting spherical tokamak power plant (2015)
  • Author(s): Keii Gi, Yasushi Ono, Makoto Nakamura, Youji Someya, Hiroyasu Utoh, Kenji Tobita, Masayuki Ono
  • Journal Title: Nuclear Fusion Volume: 55 Pages: 63036
  • DOI: 10.1088/0029-5515/55/6/063036
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Numerical study of energy conversion mechanism of magnetic reconnection in the presence of high guide field (2015)
  • Author(s): S. Inoue, Y. Ono, H. Tanabe, R. Horiuchi and C. Z. Cheng
  • Journal Title: Nuclear Fusion Volume: 55 Pages: 82014
  • DOI: 10.1088/0029-5515/55/8/083014
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Physical processes of driven magnetic reconnection in collisionless plasmas: Zero guide field case (2015)
  • Author(s): C. Z. Cheng, S. Inoue, Y. Ono, and R. Horiuchi
  • Journal Title: Physics of Plasmas Volume: 22 Pages: 101205
  • DOI: 10.1063/1.4932337
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Preface to Special Topic: Advances in Magnetic Reconnection Research in Space and Laboratory Plasmas III (2015)
  • Author(s): Yasushi Ono, Hantao Ji
  • Journal Title: Physics of Plasmas Volume: 22 Pages: 101101
  • DOI: 10.1063/1.4932343
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Localized electron heating by strong guide-field magnetic reconnection (2015)
  • Author(s): Xuehan Guo, Michiaki Inomoto, Takumichi Sugawara, Kotaro Yamasaki, Tomohiko Ushiki, Yasushi Ono
  • Journal Title: Physics of Plasmas Volume: 22 Pages: 101201
  • DOI: 10.1063/1.4932339
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Laboratory study of diffusion region with electron energization during high guide field reconnection (2015)
  • Author(s): K. Yamasaki, S. Inoue, S. Kamio, TG. Watanabe, T. Ushiki, X. Guo, T. Sugawara, K. Matsuyama, N. Kawakami, T. Yamada, M. Inomoto, Y. Ono
  • Journal Title: Physics of Plasmas Volume: 22 Pages: 101202
  • DOI: 10.1063/1.4932345
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Charge dependence of neoclassical and turbulent transport of light impurities on MAST (2015)
  • Author(s): S. S. Henderson, L. Garzotti, F. J. Casson, D. Dickinson, M. O’Mullane, A. Patel, C. M. Roach, H. P. Summers, H. Tanabe, M. Valovi and the MAST team
  • Journal Title: Plasma Physics and Controlled Fusion Volume: 57 Pages: 95001
  • DOI: 10.1088/0741-3335/57/9/095001
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Overview of MAST results (2015)
  • Author(s): I.T. Chapman, J. Adamek, R.J. Akers, S. Allan , T. O'Gorman, Y. Ono H. Oliver, S. Pamela,J. Storrs, Y. Takase, H. Tanabe, H. Tanaka, D. Taylor, T. Yamada, S. Zoletnik and MAST and MAST Upgrade Teams,
  • Journal Title: Nuclear Fusion Volume: 55 Pages: 104008
  • DOI: 10.1088/0029-5515/55/10/104008
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Two-Dimensional Electron Temperature and Density Measurement during Strong Guide-Field Reconnection by using Slide-Type Thomson Scattering System (2015)
  • Author(s): X. Guo, M. Inomoto, T. Sugawara, T. G. Watanabe, K. Yamasaki, T. Ushiki, Y. Ono
  • Journal Title: Plasma and Fusion Research Volume: 10 Pages: 3402017
  • DOI: 10.1585/pfr.10.3402017
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 外部平衡磁場分布を用いた電流シート内のプラズモイド生成実験 (2015)
  • Author(s): 西田賢人, 桑波田晃弘, 斎藤航哉, 小野靖
  • Journal Title: 気学会論文誌 A Volume: 135A Pages: 498, 499
  • DOI: 10.1541/ieejfms.135.498
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Fine structure formation of high field reconnection experiment in MAST and Univ. Tokyo (invited (2017)
  • Author(s): H. Tanabe, T. Yamada, T. Watanabe, K. Gi, H. Koike, A. Kuwahata, H. Yamanaka, K. Kimura, M. Narita, M. Inomoto, R. Imazawa, M. Gryaznevich, R. Scannell, N. Conway, T. O'Gorman, K. G. McClements, C. Z. Cheng, Y. Ono and the MAST team)
  • Organizer: MR2017 Conference (US-Japan workshops and schools on magnetic reconnection)
  • Place of Presentation: ひめぎんホール, 松山，愛媛
  • Year and Date: 2017-03-19 – 2017-03-23
  • Int'l Joint Research / Invited
• [Presentation] High Power Heating of Magnetic Reconnection in TS, MAST and ST-40 Experiments (2017)
  • Author(s): Y. Ono, H. Tanabe, S. Inoue, K. Gi, X. Guo, R. Horiuchi, S. Usami, C.Z. Cheng, M. Gryaznevich
  • Organizer: MR2017 Conference (US-Japan workshops and schools on magnetic reconnection)
  • Place of Presentation: ひめぎんホール, 松山，愛媛
  • Year and Date: 2017-03-19 – 2017-03-23
  • Int'l Joint Research / Invited
• [Presentation] Role of Parallel Electric Field in Collisionless Reconnection (2017)
  • Author(s): C. Z. Cheng, S. Inoue, Y. Ono and R. Horiuchi
  • Organizer: MR2017 Conference (US-Japan workshops and schools on magnetic reconnection)
  • Place of Presentation: ひめぎんホール, 松山，愛媛
  • Year and Date: 2017-03-19 – 2017-03-23
  • Int'l Joint Research / Invited
• [Presentation] An optical probe for local 3D ion flow measurement system (2017)
  • Author(s): Hideya Koike, Hiroshi Tanabe, Ono Yasushi
  • Organizer: MR2017 Conference (US-Japan workshops and schools on magnetic reconnection)
  • Place of Presentation: ひめぎんホール, 松山，愛媛
  • Year and Date: 2017-03-19 – 2017-03-23
  • Int'l Joint Research
• [Presentation] Development of High-Field ST Merging Experiment: TS-U for High Power Reconnection Heating (2016)
  • Author(s): Y. Ono, H. Koike, Tanabe, S. Himeno, S. Ishida, K. Kimura, M. Kawanami, M. Narita, Y. Takahata, T. Yokoyama, M. Inomoto, C. Z. Cheng
  • Organizer: 58th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: San Jose, CA, USA
  • Year and Date: 2016-10-31 – 2016-11-04
  • Int'l Joint Research
• [Presentation] Recent progress of magnetic reconnection research in the MAST spherical tokamak (Invited) (2016)
  • Author(s): Hiroshi Tanabe
  • Organizer: 58th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: San Jose, CA, USA
  • Year and Date: 2016-10-31 – 2016-11-04
  • Int'l Joint Research / Invited
• [Presentation] High Power Heating of Magnetic Reconnection in Tokamak Merging Experiments (2016)
  • Author(s): Yasushi Ono
  • Organizer: 58th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: San Jose, CA, USA
  • Year and Date: 2016-10-31 – 2016-11-04
  • Int'l Joint Research
• [Presentation] Reconnection Heating Experiments and Simulations for Torus Plasma Merging Startup (2016)
  • Author(s): Y. Ono, T. Yamada, S. Inoue, M. Inomoto, C. Z. Cheng, M. Gryaznavich, R. Scannell, N. J. Conway, B. Crowley, C. Michael, H. Hara, S. Usami and R. Horiuchi
  • Organizer: Fusion Energy Conference 2016
  • Place of Presentation: Kyoto Convension Center, Kyoto, Japan
  • Year and Date: 2016-10-17 – 2016-10-22
  • Int'l Joint Research
• [Presentation] Investigation of merging/reconnection heating during solenoid-free startup of plasmas in the MAST spherical tokamak (2016)
  • Author(s): H. Tanabe, T. Yamada, K. Gi, K. Kadowaki, M. Gryaznavich, R. Scannell, N. J. Conway, C. Michael, B. Crowley, J. Harrison, I. Fitzgerald, A. Meakings, N. Hawkins, K. Mcclrmrntd, T. O’gorman and C. Z. Cheng
  • Organizer: Fusion Energy Conference 2016
  • Place of Presentation: Kyoto Convension Center, Kyoto
  • Year and Date: 2016-10-17 – 2016-10-22
  • Int'l Joint Research
• [Presentation] Innovative Approaches to Economical DEMO reactors (invited) (2016)
  • Author(s): Yasushi Ono
  • Organizer: 3rd Annal Meeting of Innovation for Cool Earth Forum
  • Place of Presentation: Chinzanso, Tokyo
  • Year and Date: 2016-10-05 – 2016-10-06
  • Int'l Joint Research / Invited
• [Presentation] Merging/ Reconnection Heating for Direct Access to Fusion Reaction (invited) (2016)
  • Author(s): Yasushi Ono and Anthony Ford
  • Organizer: 3rd Annal Meeting of Innovation for Cool Earth Forum
  • Place of Presentation: Chinzanso, Tokyo
  • Year and Date: 2016-10-05 – 2016-10-06
  • Int'l Joint Research / Invited
• [Presentation] Experimental study of electron acceleration mechanism during high guide field reconnection (2016)
  • Author(s): K. Yamasaki, T. Ushiki, X. Guo, T. Sugawara, Y. Fukai, H. Yamanaka, R. Tamura, S. Kamio, T. Yamada, M. Inomoto and Y. Ono
  • Organizer: East-Asia School and Workshop on Laboratory, Space, and Astrophysical Plasmas
  • Place of Presentation: Epochal Tsukuba, Tsukuba, Ibaraki
  • Year and Date: 2016-07-11 – 2016-07-11
  • Int'l Joint Research
• [Presentation] Development of High Magnetic Field Merging Tokamak Experiment TS-U for Reconnection Heating Physics and Applications (2016)
  • Author(s): Yasushi Ono, Hiroshi Tanabe, Kokoro Kimura, Masashi Kawanami, Syunsuke Ishida, Ryoma Nakai, Michiaki Inomoto, Chio Zong Cheng
  • Organizer: The 18th International Congress on Plasma Physics (ICPP 2016)
  • Place of Presentation: Kaohsiung Exhibition Center in Kaohsiung, Taiwan
  • Year and Date: 2016-06-27 – 2016-07-01
  • Int'l Joint Research / Invited
• [Presentation] Shape Reconstruction of Merging Spherical Tokamak Plasma using only based on the External Magnetic Sensor Signals in UTST device (2016)
  • Author(s): T. Ushiki, M. Itagaki, M. Inomoto1
  • Organizer: The 18th International Congress on Plasma Physics (ICPP 2016)
  • Place of Presentation: Kaohsiung Exhibition Center in Kaohsiung, Taiwan
  • Year and Date: 2016-06-27 – 2016-07-01
  • Int'l Joint Research
• [Presentation] Electron heating and acceleration during high guide-field magnetic reconnection (2016)
  • Author(s): Xuehan Guo, Chio Z. Cheng, Ritoku Horiuchi, Yasushi Ono
  • Organizer: The 18th International Congress on Plasma Physics (ICPP 2016)
  • Place of Presentation: Kaohsiung Exhibition Center in Kaohsiung, Taiwan
  • Year and Date: 2016-06-27 – 2016-07-01
  • Int'l Joint Research
• [Presentation] Laboratory Experiments of Merging Tokamaks and Spheromaks for Reconnection-Heating Physics and Applications (Invited) (2016)
  • Author(s): Yasushi Ono, Hiroshi Tanabe, Kokoro Kimura, Masashi Kawanami, Syunsuke Ishida, Ryoma Nakai, Michiaki Inomoto, Chio Zong Cheng
  • Organizer: Korean Physical Society
  • Place of Presentation: Daejeon Convention Center, Daejeon, Korea
  • Year and Date: 2016-04-20 – 2016-04-22
  • Int'l Joint Research / Invited
• [Presentation] 磁気リコネクションにおけるプラズマ加熱 (2016)
  • Author(s): 田辺 博士, 山田 琢磨, 渡辺 岳典, 魏 啓為 , 門脇 和丈, 井通暁, 今澤良太, M. Gryaznevich, the MAST team, C. Z. Cheng, 小野 靖
  • Organizer: 磁気リコネクション研究の最前線と今後の展望
  • Place of Presentation: 国立天文台, 東京都三鷹市
  • Year and Date: 2016-03-08 – 2016-03-08
  • Invited
• [Presentation] Impulsive Reconnection driven by Multiple Plasmoid Ejections in Solar Flares and Laboratory Experiments (2016)
  • Author(s): N. Nishizuka, H. Hayashi, H. Tanabe, A. Kuwahata, Y. Kamino, Y. Ono, M. Inomoto, T. Shimizu
  • Organizer: MR2016 Conference (US-Japan workshop on Magnetic Reconnection)
  • Place of Presentation: Andaz Napa, Napa, CA, USA
  • Year and Date: 2016-03-07 – 2016-03-11
  • Int'l Joint Research / Invited
• [Presentation] Spectroscope development of Thomson scattering measurement for high magnetic field reconnection experiment (2016)
  • Author(s): Kokoro Kimura, Masahumi Kawanami, Shunsuke Ishida, Soma Nakai, Hiroshi Tanabe, Yasushi Ono
  • Organizer: MR2016 Conference (US-Japan workshop on Magnetic Reconnection)
  • Place of Presentation: Andaz Napa, Napa, CA, USA
  • Year and Date: 2016-03-07 – 2016-03-11
  • Int'l Joint Research
• [Presentation] Spectroscope development of Thomson scatteringmeasurement for high magnetic field reconnection experiment (2016)
  • Author(s): S. Ishida, S. Nakai, Y. Minami, M. Inomoto and Y. Ono
  • Organizer: MR2016 Conference (US-Japan workshop on Magnetic Reconnection)
  • Place of Presentation: Andaz Napa, Napa, CA, USA
  • Year and Date: 2016-03-07 – 2016-03-11
  • Int'l Joint Research
• [Presentation] Interdiciplinary Study of Reconnection Dynamics and Energy Conversion (2016)
  • Author(s): Yasushi Ono
  • Organizer: Max Planck/Princeton Center for Plasma Physics General Meeting
  • Place of Presentation: Harnack-Haus, Max-Planck Intitute, Berlin, Germany
  • Year and Date: 2016-01-12 – 2016-01-15
  • Int'l Joint Research / Invited
• [Presentation] High Power Heating of Magnetic Reconnection in Tokamak Merging Experiments (2016)
  • Author(s): Y. Ono, H. Tanabe, T. Yamada., K. Yamasaki, K. Gi, T. Ii, M. Inomoto, M. Gryaznevich, R. Scannell, N. Conway, B. Crowley and C. Michael
  • Organizer: MR2016 Conference (US-Japan workshop on Magnetic Reconnection)
  • Int'l Joint Research / Invited
• [Presentation] Recent progress of high field reconnection heating experiment in MAST (2016)
  • Author(s): H. Tanabe, T. Yamada, T. Watanabe, K. Gi, K. Kadowaki, M. Inomoto, R. Imazawa, M. Gryaznevich, C. Michael, B. Crowley, N. J. Conway, R. Scannell, J. Harrison, I. Fitzgerald, A. Meakins, N. Hawkes, K. G. McClements, T. O’Gorman, C. Z. Cheng and Y. Ono
  • Organizer: MR2016 Conference (US-Japan workshop on Magnetic Reconnection)
  • Int'l Joint Research / Invited
• [Presentation] Application of high power reconnection heating for solenoid-less startup of spherical tokamak in MAST (2016)
  • Author(s): H. Tanabe, T. Yamada, R. Imazawa, M. Gryaznevich, R. Scannell, N. Conway, B. Crowley, C. Michael, K. G. McClements, M. Inomoto, C. Z. Cheng, Y. Ono and the MAST team
  • Organizer: The 18th International Congress on Plasma Physics (ICPP 2016)
  • Int'l Joint Research / Invited
• [Presentation] Formation of Closed Flux Surfaces in Reconnection Current Layer by Accelerated Electrons during Merging Start-up of Spherical Tokamak (2016)
  • Author(s): M. Inomoto, K. Yamasaki, T. Ushika, X. Guo, S. Kamio, R. Yanai, T. Suhawara, Y. Fukai, H. Yamanaka, and R. Tamura
  • Organizer: Fusion Energy Conference 2016
  • Int'l Joint Research
• [Presentation] 大型球状トカマク合体実験MASTにおけるリコネクション加熱研究の進展（招待講演） (2015)
  • Author(s): 田辺 博士, 山田 琢磨, 渡辺 岳典, 魏 啓為, 門脇 和丈, 今澤 良太, Clive Michael, Brendan Crowley, Neil Conway, Rory Scannell, Mikhail Gryaznevich, 井 通暁, 小野 靖
  • Organizer: 第32回プラズマ・核融合学会年会
  • Place of Presentation: 名古屋大学，名古屋
  • Year and Date: 2015-11-24 – 2015-11-27
  • Invited
• [Presentation] ガイド磁場磁気リコネクションにおける磁場揺動の役割（招待講演） (2015)
  • Author(s): 桑波田晃弘，井通暁，矢内亮馬，小野靖
  • Organizer: 第32回プラズマ・核融合学会年会
  • Place of Presentation: 名古屋大学，名古屋
  • Year and Date: 2015-11-24 – 2015-11-27
  • Invited
• [Presentation] 高磁場トカマクプラズマ合体を用いた高出力磁気リコネクション加熱実験 (2015)
  • Author(s): 小野靖，木村心，川浪雅史，濱田朋宏，石田俊介，中井颯馬，齋藤航哉，桑 波田晃弘，田辺博士，井通暁，陳秋榮
  • Organizer: 第32回プラズマ・核融合学会年会
  • Place of Presentation: 名古屋大学，名古屋
  • Year and Date: 2015-11-24 – 2015-11-27
• [Presentation] Collisionless plasma dynamics in driven magnetic reconnection （招待講演） (2015)
  • Author(s): C. Z. Cheng, S. Inoue, Y. Ono, R. Horiuchi
  • Organizer: 第32回プラズマ・核融合学会年会
  • Place of Presentation: 名古屋大学，名古屋
  • Year and Date: 2015-11-24 – 2015-11-27
  • Invited
• [Presentation] 単一干渉フィルタによるトムソン散乱計測用分光器の開発 (2015)
  • Author(s): 中井颯馬,石田俊介,南佑典,小野靖
  • Organizer: 第32回プラズマ・核融合学会年会
  • Place of Presentation: 名古屋大学，名古屋
  • Year and Date: 2015-11-24 – 2015-11-27
• [Presentation] High Power Heating of Magnetic Reconnection in UTokyo Spherical Tokamak Merging Experiment: TS-U (2015)
  • Author(s): Y. Ono, M. Kawanami, K. Kimur, R. Nakai, K. Nishida, R. Ishida, H. Yamanaka, A. Kuwahata, H. Tanabe, M. Inomoto, C. Z. Cheng
  • Organizer: 57th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: Savannah Convention Center, Savannah, GA, USA
  • Year and Date: 2015-11-16 – 2015-11-20
  • Int'l Joint Research
• [Presentation] Development of ultra-fast 2D ion Doppler tomography using image intensified CMOS fast camera (2015)
  • Author(s): H. Tanabe, A. Kuwahata, H. Yamanaka, M. Inomoto, Y. Ono
  • Organizer: 57th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: Savannah Convention Center, Savannah, GA, USA
  • Year and Date: 2015-11-16 – 2015-11-20
  • Int'l Joint Research
• [Presentation] High Power Heating of Magnetic Reconnection in ST Merging Experiments (2015)
  • Author(s): Y. Ono, H. Tanabe, T. Yamada, K. Yamasaki, K. Gi, T. Ii, M. Inomoto, M. Gryaznevich, R. Scannell, N. Conway, B. Crowley and C. Michael
  • Organizer: 18th International Spherical Torus Workshop (ISTW 2015)
  • Place of Presentation: Princeton University, Princeton, USA
  • Year and Date: 2015-11-03 – 2015-11-05
  • Int'l Joint Research / Invited
• [Presentation] Center-Solenoid-Free Merging Startup of STs by Outer PF Coils in UTST (2015)
  • Author(s): M. Inomoto, K. Yamasaki, T. Ushiki, X. Guo, N. Kawakami, T. Sugawara, K. Matsuyama, A. Sato, K. Noma, Y. Fukai, H. Yamanaka, R. Tamura, A. Kuwahata, H. Tanabe, Y. Ono, T.I. Tsujimura1, S. Kamio, T. Yamada
  • Organizer: 18th International Spherical Torus Workshop (ISTW 2015)
  • Place of Presentation: Princeton University, Princeton, USA
  • Year and Date: 2015-11-03 – 2015-11-05
  • Int'l Joint Research
• [Presentation] Merging formation of high-beta ST as a target plasma for NBI (2015)
  • Author(s): M. Inomoto, K. Yamasaki, T. Ushiki, X. Guo, N. Kawakami, T. Sugawara, K. Matsuyama, A. Sato, K. Noma, Y. Fukai, H. Yamanaka, R. Tamura, A. Kuwahata, H. Tanabe, Y. Ono,
  • Organizer: 2015 US-Japan compact torus workshop
  • Place of Presentation: Nihon University, Tokyo
  • Year and Date: 2015-09-08 – 2015-09-11
  • Int'l Joint Research / Invited
• [Presentation] Plasma Heating Characteristics of Merging Spheromaks and Tokamaks (2015)
  • Author(s): Yasushi Ono
  • Organizer: 2015 International Workshop on Interrelationship between Plasma Experiments in the Laboratory and in Space
  • Place of Presentation: Atholl Palce Hotel, Pitlochry, UK
  • Year and Date: 2015-08-24 – 2015-08-28
  • Int'l Joint Research / Invited
• [Presentation] Electron and ion heating characteristics during merging/reconnection startup of spherical tokamak in MAST (2015)
  • Author(s): H. Tanabe, T. Yamada, T. Watanabe, K. Gi, K. Kadowaki, M. Inomoto, M. Gryaznevich, C. Michael, B. Crowley, N. Conway, R. Scannell and Y. Ono
  • Organizer: 2015 International Workshop on Interrelationship between Plasma Experiments in the Laboratory and in Space
  • Place of Presentation: Atholl Palce Hotel, Pitlochry, UK
  • Year and Date: 2015-08-24 – 2015-08-28
  • Int'l Joint Research
• [Presentation] High Power Heating of Magnetic Reconnection in Toroidal Plasma Merging Experiments: TS-3, TS- 4, UTST and MAST (2015)
  • Author(s): Yasushi Ono
  • Organizer: Norman Rostoker Memorial Symposium
  • Place of Presentation: The Fairmont Newport Beach Hotel, CA, USA
  • Year and Date: 2015-08-24 – 2015-08-25
  • Int'l Joint Research / Invited
• [Presentation] Reonnection Heating Experiments at University of Tokyo (2015)
  • Author(s): Yasushi Ono
  • Organizer: Second PAC meeting for the SPRF at Harbin Institute of Technology
  • Place of Presentation: Harbin Intitute of Technology, Harbin, China
  • Year and Date: 2015-08-15 – 2015-08-16
  • Int'l Joint Research / Invited
• [Presentation] High Power Heating of Magnetic Reconnection in Toroidal Plasma Merging Experiments: TS-3, TS- 4, UTST and MAST (2015)
  • Author(s): Yasushi Ono
  • Organizer: The 12th International School/ Symposium for Space Simulations (ISSS-12)
  • Place of Presentation: Prague University, Prague, Czech republic
  • Year and Date: 2015-07-03 – 2015-07-10
  • Int'l Joint Research / Invited
• [Book] The Physics of Plasma-Driven Accelerators and Accelerator-Driven Fusion (2016)
  • Author(s): Toshiki Tajima, Michl Binderbauer, Y. Ono et al.
  • Total Pages: 196
  • Publisher: AIP Publishing
• [Funded Workshop] MR2017 Conference (US-Japan workshop on Magnetic Reconnection) (2017)
  • Place of Presentation: ひめぎんホール，松山市，愛媛県
  • Year and Date: 2017-03-19 – 2017-03-22
• [Funded Workshop] MR2016 Conference (US-Japan workshop on Magnetic Reconnection) (2016)
  • Place of Presentation: Andaz Napa, Napa, CA, USA
  • Year and Date: 2016-03-07 – 2016-03-11