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Electromagnetic gyrokinetic turbulence in finite-beta helical plasmas
http://hdl.handle.net/10655/12472
http://hdl.handle.net/10655/12472c9b5c62b-8688-469d-9766-b2a27cba44fd
名前 / ファイル | ライセンス | アクション |
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Physics of Plasmas .pdf (2.8 MB)
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VoR_Phys.Plasmas21_055905 (2.7 MB)
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Item type | 学術雑誌論文 / Journal Article_02(1) | |||||
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公開日 | 2015-04-17 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Electromagnetic gyrokinetic turbulence in finite-beta helical plasmas | |||||
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 |
Ishizawa, A.
× Ishizawa, A.× Watanabe, T.× Sugama, H.× Maeyama, S.× Nakajima, N. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | A saturation mechanism for microturbulence in a regime of weak zonal flow generation is investigated by means of electromagnetic gyrokinetic simulations. The study identifies a new saturation process of the kinetic ballooning mode (KBM) turbulence originating from the spatial structure of the KBM instabilities in a finite-beta Large Helical Device (LHD) plasma. Specifically, the most unstable KBM in LHD has an inclined mode structure with respect to the mid-plane of a torus, i.e., it has a finite radial wave-number in flux tube coordinates, in contrast to KBMs in tokamaks as well as ion-temperature gradient modes in tokamaks and helical systems. The simulations reveal that the growth of KBMs in LHD is saturated by nonlinear interactions of oppositely inclined convection cells through mutual shearing as well as by the zonal flow. The saturation mechanism is quantitatively investigated by analysis of the nonlinear entropy transfer that shows not only the mutual shearing but also a self-interaction with an elongated mode structure along the magnetic field line. |
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書誌情報 |
en : Physics of Plasmas 巻 Vol.21, 号 No.5, p. 055905-1-10, 発行日 2014-05-01 |
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出版者 | ||||||
出版者 | AIP Publishing | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1063/1.4876960 | |||||
権利 | ||||||
権利情報 | ? 2014AIPPublishingLLC | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1063/1.4876960 | |||||
関連名称 | Publisher version | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |