Study of macro- and micro-scale plasma heating during merging/reconnection startup of high beta spherical tokamak

• Project/Area Number: 15K20921
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nuclear fusion studies; Plasma science
• Research Institution: The University of Tokyo
• Principal Investigator: Tanabe Hiroshi 東京大学, 大学院新領域創成科学研究科, 助教 (30726013)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: プラズマ・核融合 / 球状トカマク / 磁気リコネクション / コンピュータトモグラフィ / プラズマ診断

Outline of Final Research Achievements

This research project proceeds the study of plasma heating during merging/reconnection of two toroidal plasmas in laboratory experiments at the university of Tokyo and MAST (the world largest spherical tokamak at CCFE, UK). As a new finding, it is found that magnetic reconnection heats electrons locally in microscopic region around X-point and globally downstream of reconnection outflow. In laboratory experiments at the university of Tokyo, more detailed high resolution ion Doppler tomography measurement has been done with in-situ probe measurement of in-plane magnetic field and successfully reproduced the structure of global ion heating which forms high temperature ring on the thick layer of closed flux which is formed by reconnected magnetic field.

Research Products

• [Int'l Joint Research] CCFE/Tokamak Energy(英国)
• [Int'l Joint Research] National Cheng Kung University(台湾)
• [Int'l Joint Research] General Atomics/Washington University/PPPL(米国)
• [Int'l Joint Research] Australian National University(オーストラリア)
• [Int'l Joint Research] CCFE/Tokamak Energy Ltd.(英国)
• [Int'l Joint Research] PPPL/Univ. Washington/General Atomics(米国)
• [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 Issue: 5 Pages: 056037-056037
  • DOI: 10.1088/1741-4326/aa6608
  • Peer Reviewed / Open Access / 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 Issue: 5 Pages: 056108-056108
  • DOI: 10.1063/1.4977922
  • Peer Reviewed / Open Access / Int'l Joint Research / 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 Issue: 0 Pages: 1302093-1302093
  • DOI: 10.1585/pfr.11.1302093
  • NAID: 130005311581
  • ISSN: 1880-6821
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [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: Nucl. Fusion Volume: 56 Issue: 10 Pages: 106019-106019
  • DOI: 10.1088/0029-5515/56/10/106019
  • Peer Reviewed / Int'l Joint Research
• [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: TBD
  • NAID: 130005311581
  • Peer Reviewed / Open Access / Int'l Joint Research / 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 Issue: 8 Pages: 083014-083014
  • DOI: 10.1088/0029-5515/55/8/083014
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Center-solenoid-free merging start-up of spherical tokamak plasmas in UTST (2015)
  • Author(s): M. Inomoto, T. 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: 55 Issue: 3 Pages: 033013-033013
  • DOI: 10.1088/0029-5515/55/3/033013
  • Peer Reviewed
• [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. Valovič and the MAST team
  • Journal Title: Plasma Physics and Controlled Fusion Volume: 57 Issue: 9 Pages: 095001-095001
  • DOI: 10.1088/0741-3335/57/9/095001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [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 Issue: 5 Pages: 055708-055708
  • DOI: 10.1063/1.4920944
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [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 Issue: 10 Pages: 104008-104008
  • DOI: 10.1088/0029-5515/55/10/104008
  • Peer Reviewed / Open Access / Int'l Joint Research
• [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: Phys. Rev. Lett. Volume: 115 Issue: 21
  • DOI: 10.1103/physrevlett.115.215004
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Fine structure formation of high field reconnection experiment in MAST and univ. Tokyo (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: The US-Japan workshops and schools on magnetic reconnection (MR2017)
  • Place of Presentation: ひめぎんホール(愛媛県松山市)
  • Year and Date: 2017-03-20
  • Int'l Joint Research / Invited
• [Presentation] マルチスリット分光法を用いた高スループット・高精細イオンドップラートモグラフィ計測の開発 (2016)
  • Author(s): 田辺 博士, 小池 秀弥, 木村 心, 佐藤 直也, 成田 穂, 小野 靖
  • Organizer: 第33回プラズマ・核融合学会年会
  • Place of Presentation: 東北大学(宮城県仙台市)
  • Year and Date: 2016-11-30
• [Presentation] Recent progress of magnetic reconnection research in the MAST spherical tokamak (2016)
  • Author(s): H. Tanabe
  • Organizer: 58th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: San Jose, USA
  • Year and Date: 2016-10-31
  • Int'l Joint Research / Invited
• [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, 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
  • Organizer: 26th IAEA Fusion Energy Conference
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2016-10-19
  • 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, T. Watanabe, K. Gi, 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 and C. Z. Cheng
  • Organizer: 26th IAEA Fusion Energy Conference
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2016-10-17
  • Int'l Joint Research
• [Presentation] 合体加熱を応用したCS-less立ち上げ研究の最近の進展 (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, C. Michael, N. Conway, R. Scannell, B. Crowley, K. McClements, C. Z. Cheng, 小野 靖, the MAST team
  • Organizer: 「球状トカマク炉のための非誘導電流駆動等の要素技術の開発」研究会
  • Place of Presentation: 核融合科学研究所(岐阜県多治見市)
  • Year and Date: 2016-09-07
• [Presentation] Ion and Electron Heating Characteristics of Magnetic Reconnection in MAST Spherical Tokamak (2016)
  • Author(s): H. Tanabe, T. Yamada, R. Imazawa, M. Inomoto, C. Z. Cheng, Y. Ono and the MAST team
  • Organizer: 41st COSPAR Scientific Assembly
  • Place of Presentation: Istanbul, Turkey (トルコ治安情勢により会議開催中止)
  • Year and Date: 2016-08-02
  • Int'l Joint Research / Invited
• [Presentation] ION AND ELECTRON HEATING CHARACTERISTICS OF MAGNETIC RECONNECTION IN MAST TOKAMAK MERGING EXPERIMENT (2016)
  • Author(s): H. Tanabe, T. Yamada, R. Imazawa, M. Inomoto, C. Z. Cheng, Y. Ono and the MAST team (M. Gryaznevich, R. Scannell, N. Conway, K. G. McClements)
  • Organizer: 41st COSPAR Scientific Assembly 2016
  • Place of Presentation: Istanbul, Turkey
  • Year and Date: 2016-07-30
  • 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)
  • Place of Presentation: Kaohsiung, Taiwan
  • Year and Date: 2016-06-28
  • Int'l Joint Research
• [Presentation] 実験室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: 2016-03-28
  • 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: US-Japan workshop on Magnetic Reconnection (MR2016)
  • Place of Presentation: Napa, USA
  • Year and Date: 2016-03-07
  • Int'l Joint Research / Invited
• [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 (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, C. Michael, B. Crowley, N. Conway, R. Scannell, M. 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(愛知県, 名古屋市)
  • Year and Date: 2015-11-24
  • Invited
• [Presentation] Electron and ion heating characteristics during magnetic reconnection in MAST (2015)
  • Author(s): H. Tanabe, T. Yamada, T. Watanabe, K. Gi, K. Kadowaki, M. Inomoto, R. Imazawa, M. Gryaznevich, C. Michael, N. Conway, R. Scannell, B. Crowley, K. McClements and Y. Ono
  • Organizer: 57th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: Savannah, USA
  • Year and Date: 2015-11-16
  • 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 and Y. Ono
  • Organizer: 57th Annual Meeting of the APS Division of Plasma Physics
  • Place of Presentation: Savannah, USA
  • Year and Date: 2015-11-16
  • Int'l Joint Research
• [Presentation] Application of merging/reconnection heating for spherical tokamak in MAST (2015)
  • Author(s): H. Tanabe, T. Yamada, K. Yamasaki, T.Watanabe, K. Gi, M. Inomoto, M. Gryaznevich, R. Scannell, N. Conway, B. Crowley, C. Michael and Y. Ono
  • Organizer: 18th International Spherical Torus Workshop (ISTW 2015)
  • Place of Presentation: Princeton, USA
  • Year and Date: 2015-11-03
  • Int'l Joint Research
• [Presentation] MAST共同実験における高ガイド磁場リコネクションの加熱 (2015)
  • 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 and 小野 靖
  • Organizer: 第23回ひので-実験室研究会
  • Place of Presentation: 東京大学(東京都, 文京区)
  • Year and Date: 2015-10-12
• [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: The 2015 International Workshop on the Interrelationship between Plasma Experiments in the Laboratory and in Space (IPELS2015)
  • Place of Presentation: Pitlochry, UK
  • Year and Date: 2015-08-23
  • Int'l Joint Research
• [Remarks] 所属研究室HP (小野・井研究室)
  • URL: http://tanuki.t.u-tokyo.ac.jp/
• [Remarks] 小野・井研究室
  • URL: http://tanuki.t.u-tokyo.ac.jp/
• [Remarks] プラズマ・核融合学会 第20回学術奨励賞受賞