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Kinetic Simulations of Neoclassical and Anomalous Transport Processes in Helical Systems
http://hdl.handle.net/10655/8942
http://hdl.handle.net/10655/89427c7202e9-c01c-4397-ae82-26a3f8e2d8f4
名前 / ファイル | ライセンス | アクション |
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pfr2012_07-2403094.pdf (4.6 MB)
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Item type | 学術雑誌論文 / Journal Article_02(1) | |||||
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公開日 | 2012-10-12 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Kinetic Simulations of Neoclassical and Anomalous Transport Processes in Helical Systems | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | neoclassical transport | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | anomalous transport | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | ITG turbulence | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | zonal flow | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | gyrokinetic simulation | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | helical system | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | LHD | |||||
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 |
SUGAMA, Hideo
× SUGAMA, Hideo× WATANABE, Tomohiko× NUNAMI, Masanori× SATAKE, Shinsuke× MATSUOKA, Seikichi× TANAKA, Kenji |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Drift kinetic and gyrokinetic theories and simulations are powerful means for quantitative predictions of neoclassical and anomalous transport fluxes in helical systems such as the Large Helical Device (LHD). The δf Monte Carlo particle simulation code, FORTEC-3D, is used to predict radial profiles of the neoclassical particle and heat transport fluxes and the radial electric field in helical systems. The radial electric field profiles in the LHD plasmas are calculated from the ambipolarity condition for the neoclassical particle fluxes obtained by the global simulations using the FORTEC-3D code, in which effects of ion or electron finite orbit widths are included. Gyrokinetic Vlasov simulations using the GKV code verify the theoretical prediction that the neoclassical optimization of helical magnetic configuration enhances the zonal flow generation which leads to the reduction of the turbulent heat diffusivity χi due to the ion temperature gradient (ITG) turbulence. Comparisons between results for the high ion temperature LHD experiment and the gyrokinetic simulations using the GKV-X code show that the χi profile and the poloidal wave number spectrum of the density fluctuation obtained from the simulations are in reasonable agreements with the experimental results. It is predicted theoretically and confirmed by the linear GKV simulations that the E × B rotation due to the background radial electric field Er can enhance the zonal-flow response to a given source. Thus, in helical systems, the turbulent transport is linked to the neoclassical transport through Er which is determined from the ambipolar condition for neoclassical particle fluxes and influences the zonal flow generation leading to reduction of the turbulent transport. In order to investigate the Er effect on the regulation of the turbulent transport by the zonal flow generation, the flux-tube bundle model is proposed as a new method for multiscale gyrokinetic simulations. | |||||
書誌情報 |
en : Plasma and Fusion Research 巻 Vol.7, 号 No. S1, p. 2403094-1 - 2403094-9, 発行日 2012-07-01 |
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出版者 | ||||||
出版者 | プラズマ・核融合学会 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1585/pfr.7.2403094 | |||||
権利 | ||||||
権利情報 | ? 2012 The Japan Society of Plasma Science and Nuclear Fusion Research |