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Observation of Reversed-Shear Alfve ́n Eigenmodes Excited by Energetic Ions in a Helical Plasma
http://hdl.handle.net/10655/8133
http://hdl.handle.net/10655/81330144eb34-472d-4991-b2e8-69f62bc4f441
名前 / ファイル | ライセンス | アクション |
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PhysRevLett.105.145003.pdf (1.0 MB)
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Item type | 学術雑誌論文 / Journal Article_02(1) | |||||
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公開日 | 2012-06-25 | |||||
タイトル | ||||||
タイトル | Observation of Reversed-Shear Alfve ́n Eigenmodes Excited by Energetic Ions in a Helical Plasma | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Observation of Reversed-Shear Alfv?n Eigenmodes Excited by Energetic Ions in a Helical Plasma | |||||
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_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Toi, K.
× Toi, K.× Watanabe, F.× Tokuzawa, T.× Ida, K.× Morita, S.× Ido, T.× Shimizu, A.× Isobe, M.× Ogawa, K.× Spong, D. A.× Todo, Y.× Watari, T.× Ohdachi, S.× Sakakibara, S.× Yamamoto, S.× Inagaki, S.× Narihara, K.× Osakabe, M.× Nagaoka, K.× Narushima, Y.× Watanabe, K.Y× Funaba, H.× Goto, M.× Ikeda, K.× Ito, T.× Kaneko, O.× Kubo, S.× Murakami, S.× Minami, T.× Miyazawa, J.× Nagayama, Y.× Nishiura, M.× Oka, Y.× Sakamoto, R.× Shimozuma, T.× Takeiri, Y.× Tanaka, K.× Tsumori, K.× Yamada, I.× Yoshinuma, M.× Kawahata, K.× Komori, A.× LHD, Experiment Group |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Reversed-shear Alfv?n eigenmodes were observed for the first time in a helical plasma having negative q0′′ (the curvature of the safety factor q at the zero shear layer). The frequency is swept downward and upward sequentially via the time variation in the maximum of q. The eigenmodes calculated by ideal MHD theory are consistent with the experimental data. The frequency sweeping is mainly determined by the effects of energetic ions and the bulk pressure gradient. Coupling of reversed-shear Alfv?n eigenmodes with energetic ion driven geodesic acoustic modes generates a multitude of frequency-sweeping modes. | |||||
書誌情報 |
en : Physical Review Letters 巻 Vol.105, 号 Issue 14, p. 145003-1 - 145003-4, 発行日 2010-10-01 |
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出版者 | ||||||
出版者 | American Physical Society | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1103/PhysRevLett.105.145003 | |||||
権利 | ||||||
権利情報 | ? 2010 The American Physical Society |