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Simulation Study of Interaction between Energetic Ions and Alfv n Eigenmodes in LHD
http://hdl.handle.net/10655/2522
http://hdl.handle.net/10655/2522a5cac15f-6323-4c9b-9992-21fd96bdb4a5
Item type | 研究報告書 / Research Paper(1) | |||||
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公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Simulation Study of Interaction between Energetic Ions and Alfv n Eigenmodes in LHD | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
"Todo, Y.
× "Todo, Y.× Nakajima, N.× Osakabe, M.× Yamamoto, S.× Spong, D.A." |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "Interaction between energetic ions and Alfv n eigenmodes (AE modes) in LHD was investigated with numerical approaches. The spatial profile and frequency of the AE modes in an LHD plasma #47645, where the creation of holes and clumps in the energetic ion energy spectrum associated with AE modes was observed with the neutral particle analyzer (NPA) [M. Osakabe et al., Nucl. Fusion 46, S911 (2006)], were analyzed with the AE3D code. The phase space structures of the energetic ions on the NPA line-of-sight were investigated with the Poincar plots where an oscillating AE mode for each plot is employed. The radial width of the phase space regions trapped by the AE modes corresponds to the transport distance of energetic ions. As island width depends on AE mode amplitude, it was found that AE mode amplitude of deltaB_r / B~10^-3 is consistent with the energetic-ion transport over 10% of the minor radius that is suggested by the difference in slowing-down time between the holes and clumps observed with the NPA in the LHD experiment. Furthermore, a numerical code which simulates the time evolution of energetic particles and AE mode amplitude and phase in a self-consistent way has been newly developed for three-dimensional equilibria such as LHD. Alfv n eigenmode bursts in LHD plasma were simulated with neutral-beam injection and collisions taken into account." | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 2008-10-01 |
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報告書番号 | ||||||
NIFS-914 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |