2013 Fiscal Year Final Research Report
Study on the elucidation of appearance and growth mechanism of magnetic islands and their active control in torus plasmas
| Project/Area Number |
22760662
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Nuclear fusion studies
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
ISAYAMA Akihiko 独立行政法人日本原子力研究開発機構, 核融合研究開発部門那珂核融合研究所, 研究主幹 (90354597)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Keywords | 磁気島 / テアリングモード / 電磁流体力学的不安定性 / 電子サイクロトロン波 / トカマク / プラズマ / 核融合 |
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| Research Abstract |
Structure of magnetic islands associated with neoclassical tearing modes (NTMs) during their onset and evolution has been investigated. The NTM islands were found to be triggered by a small collapse associated with another instability, in addition to onset without detectable instabilities. It was found that the value of the normalized beta for the collapse-triggered NTM is larger than that for the trigger-less NTM, and that the pressure gradient at the mode location is steeper for the former case. The magnetic island width at which the plasma rotation suddenly slows down is larger than that at the plasma starts to rotate after the island width is decreased. This indicates that there is a hysteresis in the island width for mode locking and unlocking. The development of a device for active control of magnetic islands, a dual-frequency gyrotron, has made progressed, and a good prospect has been obtained toward the achievement of its nominal values.
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[Journal Article] Progress in the Development of the ECRF System for JT-60SA2012
Author(s)
A. Isayama, T. Kobayashi, S. Moriyama, K. Yokokura, M. Shimono, M. Sawahata, S. Suzuki, M. Terakado, S. Hiranai, K. Wada, J. Hinata, Y. Sato, K. Hoshino, K. Sakamoto, K. Kajiwara, Y. Oda, K. Hamamatsu, M. Saigusa and C. Sozzi
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Journal Title
Fusion Energy 2012(Proceedings of 24th IAEA Fusion Energy Conference, San Diego, the United States of America)
Volume: FTP
Pages: 1-16
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[Journal Article] Recent Results from the Development of the Electron Cyclotron Heating System for JT-60SA toward High-power Long-Pulse Operations2012
Author(s)
A. Isayama, T. Kobayashi, K. Yokokura, M. Shimono, M. Sawahata, S. Suzuki, M. Terakado, S. Hiranai, K. Wada, J. Hinata, Y. Sato, K. Hoshino, S. Moriyama, K. Sakamoto and K. Hamamatsu
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Journal Title
Plasma and Fusion Research
Volume: Vol.7
Pages: 2405029(5)
Peer Reviewed
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[Presentation] Recent Progress in ECRF System Development for JT-60SA
Author(s)
A. Isayama, T. Kobayashi, K. Yokokura, M. Shimono, M. Sawahata, S. Suzuki, M. Terakado, S. Hiranai, K. Wada, J. Hinata, Y. Sato, K. Hoshino, S. Moriyama, K. Sakamoto and K. Hamamatsu
Organizer
Japan-Korea Workshop on Physics and Technology of Heating and Current Drive
Place of Presentation
Uji(Kyoto)
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[Presentation] Recent Results from the Development of the Electron Cyclotron Heating System for JT-60SA toward High-power Long-Pulse Operations
Author(s)
A. Isayama, T. Kobayashi, K. Yokokura, M. Shimono, M. Sawahata, S. Suzuki, M. Terakado, S. Hiranai, K. Wada, J. Hinata, Y. Sato, K. Hoshino, S. Moriyama, K. Sakamoto and K. Hamamatsu
Organizer
21st International Toki Conference
Place of Presentation
Toki(Gifu)
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[Presentation] Progress in the Development of the ECRF ば System for JT-60SA
Author(s)
A. Isayama, T. Kobayashi, S. Moriyama, K. Yokokura, M. Shimono, M. Sawahata, S. Suzuki, M. Terakado, S. Hiranai, K. Wada, J. Hinata, Y. Sato, K. Hoshino, K. Sakamoto, K. Kajiwara, Y. Oda, K. Hamamatsu, M. Saigusa and C. Sozzi
Organizer
Fusion Energy 2012(Proceedings of 24th IAEA Fusion Energy Conference)
Place of Presentation
San Diego, the United States of America
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[Presentation] JT-60SAに向けた電子サイクロトロン加熱システムの開発
Author(s)
諫山明彦, 小林貴之, 森山伸一, 横倉賢治, 下野貢, 澤畠正之, 鈴木貞明, 寺門正之, 平内慎一, 和田健次, 日向 淳, 佐藤福克, 星野克道, 坂本慶司, 梶原 健, 濱松清隆
Organizer
プラズマ・核融合学会第29回年会
Place of Presentation
春日・福岡
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