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Fast ion profile stiffness due to the resonance overlap of multiple Alfvén eigenmodes
http://hdl.handle.net/10655/00012641
http://hdl.handle.net/10655/000126415cdf14c3-4154-4e84-a502-715acae69070
名前 / ファイル | ライセンス | アクション |
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Nucl.Fusion56_pp112008 (3.6 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-09-21 | |||||
タイトル | ||||||
タイトル | Fast ion profile stiffness due to the resonance overlap of multiple Alfvén eigenmodes | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | profile stiffness | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | resonance overlap | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | energetic particle | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | fast ion | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Alfvén eigenmode | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
TODO, Yasushi
× TODO, Yasushi× Zeeland, M.A. Van× Heidbrink, W.W. |
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著者ID | ||||||
内容記述タイプ | Other | |||||
内容記述 | 0000-0001-9323-8285 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Fast ion pressure profiles flattened by multiple Alfvén eigenmodes (AEs) are investigated for various neutral beam deposition powers in a multi-phase simulation, which is a combination of classical simulation and hybrid simulation for energetic particles interacting with a magnetohydrodynamic fluid. Monotonic degradation of fast ion confinement and fast ion profile stiffness is found with increasing beam deposition power. The confinement degradation and profile stiffness are caused by a sudden increase in fast ion transport flux brought about by AEs for fast ion pressure gradients above a critical value. The critical pressure gradient and the corresponding beam deposition power depend on the radial location. The fast ion pressure gradient stays moderately above the critical value, and the profiles of the fast ion pressure and fast ion transport flux spread radially outward from the inner region, where the beam is injected. It is found that the square root of the MHD fluctuation energy is proportional to the beam deposition power. Analysis of the time evolutions of the fast ion energy flux profiles reveals that intermittent avalanches take place with contributions from the multiple eigenmodes. Surface of section plots demonstrate that the resonance overlap of multiple eigenmodes accounts for the sudden increase in fast ion transport with increasing beam power. The critical gradient and critical beam power for the profile stiffness are substantially higher than the marginal stability threshold. | |||||
書誌情報 |
Nuclear Fusion 巻 56, 号 11, p. 112008, 発行日 2016-07-22 |
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出版者 | ||||||
出版者 | IOP Publishing | |||||
出版者 | ||||||
出版者 | International Atomic Energy Agency | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 17414326 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12472385 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1088/0029-5515/56/11/112008 | |||||
権利 | ||||||
権利情報 | This is the Accepted Manuscript version of an article accepted for publication in Nuclear Fusion. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/0029-5515/56/11/112008 | |||||
権利 | ||||||
権利情報 | Citation Y. Todo et al 2016 Nucl. Fusion 56 112008 | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1088/0029-5515/56/11/112008 | |||||
関連名称 | Publisher version | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
NAIS | ||||||
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