| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-05-07 |
| タイトル |
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タイトル |
Effects of the resonance modification by electron cyclotron current drive on the linear and nonlinear dynamics of energetic particle driven magnetohydrodynamics modes in Heliotron J |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Adulsiriswad Panith
Todo Yasushi
Yamamoto Satoshi
Kado Shinichiro
Shinji KOBAYASHI
Oshima Shinsuke
OKADA Hiroyuki
Minami Takashi
Nakamura Yuji
Ishizawa Akihiro
Konoshima Shigeru
Mizuuchi Tohru
Nagasaki Kazunobu
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
This study investigates the effects of electron cyclotron current drive (ECCD) on the linear and nonlinear dynamics of energetic-particle (EP)-driven magnetohydrodynamics (MHD) instability (mode) in Heliotron J (HJ). The effects of ECCD are included through the modification of the equilibrium magnetic field. In addition to the enhancements of the local magnetic shear and continuum damping by ECCD as proposed in previous studies, the study suggests that changes in the linear EP and shear Alfven wave resonance is another important factor, especially for the n/m = 1/2 EPM which is a dominant mode observed in HJ. The study shows that in the currentless equilibrium, the high-velocity toroidicity-induced resonance between the n/m = 1/2 mode and the co-passing EP (L = ?1) has the highest EP energy transfer rate, but is located slightly below the NBI injection velocity. The co-ECCD and cntr-ECCD can shift this resonance into higher and lower velocity regions, respectively. This can lead to resonance removal for co-ECCD, while cntr-ECCD can initially increase the number of resonant EPs for a small value of shift. If the shift of the resonance by cntr-ECCD is sufficiently large, the study observes stabilization due to the reduction in the EP population in the low-velocity region. The study also finds that changes in resonance affect nonlinear dynamics such as EP transport and frequency chirping. |
| 書誌情報 |
Nuclear Fusion
巻 64,
号 1,
p. 016036,
発行日 2023-12
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| 出版者 |
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出版者 |
IoP Publishing, International Atomic Energy Agency, EURATOM |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1741-4326 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1088/1741-4326/ad0a0c |
