Pulsed and High Power Reconnection Heating Experiments for Tokamak Plasma Ignition
Project/Area Number |
15K14279
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Research Category |
Grant-in-Aid for Challenging Exploratory Research
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Allocation Type | Multi-year Fund |
Research Field |
Nuclear fusion studies
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Research Institution | The University of Tokyo |
Principal Investigator |
Ono Yasushi 東京大学, 大学院新領域創成科学研究科, 教授 (30214191)
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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)
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Research Collaborator |
Horiuchi Ritoku
Gryaznevich Michael
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Project Period (FY) |
2015-04-01 – 2019-03-31
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Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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Keywords | 磁気リコネクション / プラズマ合体 / イオン加熱 / 球状トカマク / アルファ加熱 / アウトフロー / ショック / 電子加熱 / イオン加速 |
Outline of Final Research Achievements |
We maximized reconnection heating power of two merging tokamak plasmas, realizing its ion heating up to 2.2keV under its electron density 30 trillion/cc. Using TS-3, TS-6 in Univ. Tokyo, MAST and ST-40 in UK, we verified its key scaling law in the keV regime: the reconnection heating scales with the square of reconnecting (almost poloidal) magnetic field. To obtain this maximized ion heating, we need to compress the current sheet to the order of ion gyroradius, triggering its anomalous resistivity and the following fast reconnection and also to reduce the heating loss much lower than the reconnection heating power. Those experimental results and PIC simulation were introduced by a number of our invited/ plenary talks in 2018 AAPPS, 2017 ICPP meetings etc. and by our journal articles and newspapers, leading us to construction of new merging/ reconnection heating experiment: ST-40 in Tokamak Energy. Inc.(UK).
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Academic Significance and Societal Importance of the Research Achievements |
2個のトカマクを合体させて,その高出力イオン加熱を核融合点火に利用するアイデアは独創的なトカマク立ち上げ法であり,今回,2keVを超えて,再結合磁場の2乗に比例するスケーリング則を実証したことにより,基本的な応用手法が定まった。合体する核融合プラズマが,磁気リコネクション加熱により瞬時にポロイダル磁気エネルギーの半分程度がイオン熱エネルギーに変換されたことで,極めて安価な合体加熱が,従来の追加熱機器に取って代わる可能性がでてきた。成果の多くは招待講演や解説として評価されており,実際に英国ベンチャーのST-40合体実験に発展して可能性が大きく広がり,本手法による核融合点火の実用化が待たれる。
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Report
(5 results)
Research Products
(133 results)
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[Journal Article] Effects of Reconnection Downstream Conditions on Electron Parallel Acceleration during Merging Start-Up of Spherical Tokamak2019
Author(s)
Michiaki Inomoto, Tomohiko Ushiki, Xuehan Guo, Takumichi Sugawara, Kyohei Kondo, Takumi Mihara, Yusuke Minami, Yuki Inai, Hiraku Kaneko, Ryoma Yanai,; Yoshifumi Takahata, Hiroshi Tanabe, Yasushi Ono, A. Sanpei,; Shuji Kami
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Journal Title
Nuclear Fusion
Volume: 印刷中
Related Report
Peer Reviewed
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[Journal Article] Scaling study of reconnection/ merging heating of spherical tokamak plasmas for direct access to burning plasmas2018
Author(s)
Y. Ono, M. Akimitsu, S. Kamiya, H. Tanaka, S. Inoue, A. Sawada, A. Borade, Q, Cao, M. Inomoto, H. Tanabe, C. Z. Cheng, R. Horiuchi, S. Usami
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Journal Title
Fusion Energy 2018
Volume: EXP/P3-24
Pages: 1-8
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Effects of Reconnection Downstream Conditions on Electron on Prallel Acceleration during Sart-Up of Spherical Tokamak2018
Author(s)
M. Inomoto, T. Ushiki, X. Guo, T. Sugawara, K. Kondo, T. Mihara, Y. MIinami, Y. Inai, R. Yanai, Y. Tatahata, H. Tanabe, Y. Ono, A. Sanpei, S. Kamio,
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Journal Title
Fusion Energy 2018
Volume: EXP/P7-17
Pages: 1-8
Related Report
Peer Reviewed
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[Journal Article] Effects of Reconnection Downstream Conditions on Electron Parallel Acceleration during Merging Start-up of Spherical Tokamak2018
Author(s)
M. Inomoto, T. Ushiki, X. Guo, T. Sugawara, K. Kondo, T. Mihara, Y. Minami, Y. Inai, R. Yanai, Y. Takahata, H. Tanabe, Y. Ono, A. Sanpei, S. Kamio
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Journal Title
Fusion Energy 2018
Volume: 印刷中
Related Report
Peer Reviewed
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[Journal Article] Investigation of Merging/reconnection Heating during Solenoid-free Startup of Plasmas in the MAST Spherical Tokamak2017
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
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Journal Title
Nuclear Fusion
Volume: 57
Issue: 5
Pages: 056037-056037
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[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
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Journal Title
Physics of Plasmas
Volume: 24
Issue: 5
Pages: 056108-056108
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Application of Tomographic Ion Doppler Spectroscopy to Merging Plasma Startup in the MAST Spherical Tokamak2016
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
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Journal Title
Plasma and Fusion Research
Volume: 11
Issue: 0
Pages: 1302093-1302093
DOI
NAID
ISSN
1880-6821
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Reconnection Heating Experiments and Simulations for Torus Plasma Merging Startup2016
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
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Journal Title
Fusion Energy 2016
Volume: 1
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Investigation of Merging/reconnection Heating during Solenoid-free Startup of Plasmas in the MAST Spherical Tokamak2016
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
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Journal Title
Fusion Energy 2016
Volume: 1
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[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
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Journal Title
Physics of Plasmas
Volume: 22
Issue: 5
Pages: 055708-055708
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Electron and Ion Heating Characteristics during Magnetic Reconnection in the MAST Spherical Tokamak2015
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
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Journal Title
Physical Review Letters
Volume: 115
Pages: 215004-215004
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Center-solenoid-free merging start-up of spherical tokamak plasmas in UTST2015
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
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Journal Title
Nuclear Fusion
Volume: 55
Issue: 3
Pages: 033013-033013
DOI
Related Report
Peer Reviewed
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[Journal Article] Laboratory study of diffusion region with electron energization during high guide field reconnection2015
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
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Journal Title
Physics of Plasmas
Volume: 22
Issue: 10
Pages: 101202-101202
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Overview of MAST results2015
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,
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Journal Title
Nuclear Fusion
Volume: 55
Issue: 10
Pages: 104008-104008
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] caling study of reconnection/ merging heating of spherical tokamak plasmas for direct access to burning plasmas2018
Author(s)
Y. Ono, M. Akimitsu, S. Kamiya, H. Tanaka, S. Inoue, A. Sawada, A. Borade, Q, Cao, M. Inomoto, H. Tanabe, C. Z. Cheng, R. Horiuchi, S. Usami
Organizer
Fusion Energy Conference 2018
Related Report
Int'l Joint Research
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[Presentation] Effects of Reconnection Downstream Conditions on Electron on Prallel Acceleration during Sart-Up of Spherical Tokamak2018
Author(s)
M. Inomoto, T. Ushiki, X. Guo, T. Sugawara, K. Kondo, T. Mihara, Y. MIinami, Y. Inai, R. Yanai, Y. Tatahata, H. Tanabe, Y. Ono, A. Sanpei, S. Kamio
Organizer
Fusion Energy Conference 2018
Related Report
Int'l Joint Research
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[Presentation] Fine structure formation of high field reconnection experiment in MAST and Univ. Tokyo (invited2017
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
Related Report
Int'l Joint Research / Invited
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[Presentation] High Power Heating of Magnetic Reconnection in TS, MAST and ST-40 Experiments2017
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
Related Report
Int'l Joint Research / Invited
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[Presentation] Fine structure formation of high field reconnection experiment in MAST and Univ. Tokyo2017
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
Related Report
Int'l Joint Research / Invited
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[Presentation] Development of High-Field ST Merging Experiment: TS-U for High Power Reconnection Heating2016
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
Related Report
Int'l Joint Research
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[Presentation] Reconnection Heating Experiments and Simulations for Torus Plasma Merging Startup2016
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, Kyoro
Year and Date
2016-10-17
Related Report
Int'l Joint Research
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[Presentation] Reconnection Heating Experiments and Simulations for Torus Plasma Merging Startup2016
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, Kyoto
Year and Date
2016-10-17
Related Report
Int'l Joint Research
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[Presentation] Formation of Closed Flux Surfaces in Reconnection Current Layer by Accelerated Electrons during Merging Start-up of Spherical Tokamak2016
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
Place of Presentation
Kyoto Convension Center, Kyoto, Kyoto
Year and Date
2016-10-17
Related Report
Int'l Joint Research
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[Presentation] High Power Heating of Magnetic Reconnection in Toroidal Plasma Merging Experiments: TS-3, TS- 4, UTST and MAST2016
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 Exhibition Center in Kaohsiung, Taiwan
Year and Date
2016-06-27
Related Report
Int'l Joint Research / Invited
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[Presentation] High Power Heating of Magnetic Reconnection in Tokamak Merging Experiments2016
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)
Place of Presentation
Andaz Napa, Napa, CA, USA
Year and Date
2016-03-07
Related Report
Int'l Joint Research / Invited
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[Presentation] Recent progress of high field reconnection heating experiment in MAST2016
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)
Place of Presentation
Andaz Napa, Napa, CA, USA
Year and Date
2016-03-07
Related Report
Int'l Joint Research / Invited
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[Presentation] Impulsive Reconnection driven by Multiple Plasmoid Ejections in Solar Flares and Laboratory Experiments2016
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
Related Report
Int'l Joint Research / Invited
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[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, 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
Related Report
Int'l Joint Research / Invited
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[Presentation] High Power Heating of Magnetic Reconnection in UTokyo Spherical Tokamak Merging Experiment: TS-U2015
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
Related Report
Int'l Joint Research
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[Presentation] Electron and ion heating characteristics during magnetic reconnection in MAST2015
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, 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
Related Report
Int'l Joint Research
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[Presentation] High Power Heating of Magnetic Reconnection in ST Merging Experiments2015
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
Related Report
Int'l Joint Research / Invited
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[Presentation] Center-Solenoid-Free Merging Startup of STs by Outer PF Coils in UTST2015
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
Related Report
Int'l Joint Research
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[Presentation] Merging formation of high-beta ST as a target plasma for NBI2015
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
Related Report
Int'l Joint Research / Invited
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[Presentation] Electron and ion heating characteristics during merging/reconnection startup of spherical tokamak in MAST2015
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
Related Report
Int'l Joint Research
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