Verification of the heating effect at spherical tokamak merging startup in conditions close to the nuclear fusion reactor

• Project/Area Number: 25820434
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nuclear fusion studies
• Research Institution: Kyushu University
• Principal Investigator: Yamada Takuma 九州大学, 基幹教育院, 准教授 (90437773)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 炉心プラズマ / 球状トカマク / 磁気リコネクション / 国際研究者交流 / イギリス

Outline of Final Research Achievements

The world-largest merging device MAST (Culham Science Centre, UK), and UTST (Univ. Tokyo) which has all the magnetic coils out of the vacuum vessel, are spherical tokamak merging devices in conditions close to the nuclear fusion reactor. In these devices, electron and ion heating during spherical tokamak merging startup was observed. At around the merging X-point, the electrons and ions were heated by the electric field induced by the reconnection, depending on the amplitude of the guide field. The ions were heated at the reconnection outflow region, and the heat was soon migrated to the electrons. From these observations, the heating effect of the merging startup was verified.

Research Products

• [Int'l Joint Research] Culham Science Centre(英国)
• [Int'l Joint Research] National Cheng Kung University(台湾)
• [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. 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: 1-4
  • NAID: 130005311581
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Evaluation of Non-Linear Mode Coupling During End-Plate Biasing Experiment in PANTA (2015)
  • Author(s): F. Kin, T. Yamada, S. Inagaki, H. Arakawa, Y. Nagashima, N. Kasuya, A. Fujisawa, K. Nakanishi, H. Kono, T. Mizokami, M. Sasaki, M. Lesur, Y. Kosuga, K. Itoh and S.-I. Itoh
  • Journal Title: Plasma and Fusion Research Volume: 10 Issue: 0 Pages: 3401043-3401043
  • DOI: 10.1585/pfr.10.3401043
  • NAID: 130005292385
  • ISSN: 1880-6821
  • Peer Reviewed / Acknowledgement Compliant
• [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 Issue: 0 Pages: 3402017-3402017
  • DOI: 10.1585/pfr.10.3402017
  • NAID: 130005302921
  • Peer Reviewed / Open Access / 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 Issue: 5 Pages: 055708-055708
  • DOI: 10.1063/1.4920944
  • Peer Reviewed / Open Access / 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 Issue: 10 Pages: 101201-101201
  • DOI: 10.1063/1.4932339
  • Peer Reviewed / Int'l Joint Research / 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 Issue: 10 Pages: 101202-101202
  • DOI: 10.1063/1.4932345
  • 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: Phys. Rev. Lett. Volume: 115 Issue: 21
  • DOI: 10.1103/physrevlett.115.215004
  • Peer Reviewed / Open Access / 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] End plate biasing experiments in linear magnetized plasmas (2014)
  • Author(s): 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, K. Itoh
  • Journal Title: Nuclear Fusion Volume: 54 Issue: 11 Pages: 1140101-5
  • DOI: 10.1088/0029-5515/54/11/114010
  • Peer Reviewed / Open Access
• [Journal Article] Experimental Results of Ion Heating by Magnetic Reconnection Using External Coils (2014)
  • Author(s): S. Kamio, T.G. Watanabe, K. Yamasaki, Q.H. Cao, T. Yamada, M. Inomoto and Y. Ono
  • Journal Title: Plasma and Fusion Research Volume: 9 Issue: 0 Pages: 3402038-3402038
  • DOI: 10.1585/pfr.9.3402038
  • NAID: 130005260438
  • ISSN: 1880-6821
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 今日からはじめる磁場閉じ込めプラズマ実験 コラム7 (2014)
  • Author(s): 山田琢磨
  • Journal Title: プラズマ・核融合学会誌 Volume: 90 Pages: 740-740
• [Journal Article] Streamer Structures in Experiment and Modeling (2013)
  • Author(s): T. Yamada, M. Sasaki, N. Kasuya, Y. Nagashima, S. Inagaki, T. Kobayashi, M. Yagi, A. Fujisawa, S.-I. Itoh and K. Itoh
  • Journal Title: Plasma and Fusion Research Volume: 8 Issue: 0 Pages: 2401022-2401022
  • DOI: 10.1585/pfr.8.2401022
  • NAID: 130004678505
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Experimental Study of Two-Fluid Effect during Magnetic Reconnection in the UTST Merging Experiment (2013)
  • Author(s): K. Yamasaki, S. Kamio, K. Takemura, Q.H. Qao, T.G. Watanabe, H. Itagaki, T. Yamada, M. Inomoto, Y. Ono
  • Journal Title: Plasma and Fusion Research Volume: 8 Issue: 0 Pages: 2401130-2401130
  • DOI: 10.1585/pfr.8.2401130
  • NAID: 130004678522
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Plasmoid-Induced Pull Reconnection Experiments in University of Tokyo Spherical Tokamak (2013)
  • Author(s): T.G Watanabe, Y. Ono, T. Yamada, S. Kamio, Q.H. Cao, H. Itagaki, K. Takemura, K. Yamasaki, K. Ishiguchi, M. Inomoto
  • Journal Title: Plasma and Fusion Research Volume: 8 Issue: 0 Pages: 2401148-2401148
  • DOI: 10.1585/pfr.8.2401148
  • NAID: 130004678526
  • ISSN: 1880-6821
  • Peer Reviewed
• [Presentation] 直線プラズマ装置PANTAにおけるストリーマーと媒介波の構造 (2016)
  • Author(s): 山田琢磨, 稲垣滋, 金史良, 荒川弘之, 永島芳彦, 小林達哉, 三輪祐大, 神崎智継, 糟谷直宏, 佐々木真, 小菅佑輔, 藤澤彰英, 伊藤公孝, 伊藤早苗
  • Organizer: 日本物理学会 第71回年次大会
  • Place of Presentation: 東北学院大学 泉キャンパス
  • Year and Date: 2016-03-19
• [Presentation] PANTAにおけるエンドプレートバイアス時の構造形成の変化 (2015)
  • Author(s): 山田琢磨, 稲垣滋, 金史良, 荒川弘之, 永島芳彦, 甲野輝, 溝上高明, 中西康介, 糟谷直宏, 佐々木真, Maxime Lesur, 小菅佑輔, 藤澤彰英, 伊藤公孝, 伊藤早苗
  • Organizer: 日本物理学会 第70回年次大会
  • Place of Presentation: 早稲田大学 早稲田キャンパス
  • Year and Date: 2015-03-21 – 2015-03-25
• [Presentation] Streamer and Nonlinear Coupling with Turbulence (2014)
  • Author(s): T. Yamada, S. Inagaki, T. Kobayashi, Y. Nagashima, Y. Miwa, K. Nakanishi, M. Sasaki, N. Kasuya, M. Lesur, Y. Kosuga, A. Fujisawa, S.-I. Itoh and K. Itoh
  • Organizer: 1th Asia Pacific Transport Working Group International Conference
  • Place of Presentation: 九州大学 筑紫キャンパス
  • Year and Date: 2014-06-10 – 2014-06-13
  • Invited
• [Presentation] PANTAにおけるエンドプレートバイアス実験 (2014)
  • Author(s): 山田琢磨, 稲垣滋, 小林達哉, 永島芳彦, 満薗友宏, 三輪祐大, 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
  • Organizer: 日本物理学会 第69回年次大会
  • Place of Presentation: 東海大学 湘南キャンパス
• [Presentation] PANTAにおけるストリーマー構造の形成条件 (2013)
  • Author(s): 山田琢磨, 稲垣滋, 小林達哉, 永島芳彦, 満薗友宏, 三輪祐大, 中西康介, 藤野博充, 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
  • Organizer: 日本物理学会 2013年秋季大会
  • Place of Presentation: 徳島大学 常三島キャンパス
• [Presentation] メゾスケール揺動の非線形機構 (2013)
  • Author(s): 山田琢磨, 稲垣滋, 小林達哉, 永島芳彦, 佐々木真, 糟谷直宏, 藤澤彰英, 伊藤早苗, 伊藤公孝
  • Organizer: 日本物理学会 2013年秋季大会
  • Place of Presentation: 徳島大学 常三島キャンパス
• [Presentation] Formation of streamer in linear magnetized plasmas (2013)
  • Author(s): T. Yamada, S. Inagaki, T. Kobayashi, Y. Nagashima, T. Mitsuzono, Y. Miwa, H. Fujino, M. Sasaki, N. Kasuya, M. Lesur, Y. Kosuga, A. Fujisawa, S.-I. Itoh and K. Itoh
  • Organizer: 14th International Workshop on H-mode Physics and Transport Barriers
  • Place of Presentation: 九州大学 筑紫キャンパス
• [Presentation] 揺動の2次元断面構造の推定法 (2013)
  • Author(s): 山田琢磨, 稲垣滋, 小林達哉, 永島芳彦, 満薗友宏, 三輪祐大, 藤野博充, 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
  • Organizer: プラズマ・核融合学会 第30回年会
  • Place of Presentation: 東京工業大学 大岡山キャンパス