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Zonal Flows and Ion Temperature Gradient Instabilities in Multiple-helicity Magnetic Fields
http://hdl.handle.net/10655/2890
http://hdl.handle.net/10655/28903f35edeb-8f5b-450c-9317-eb8167f9fd7e
Item type | 研究報告書 / Research Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Zonal Flows and Ion Temperature Gradient Instabilities in Multiple-helicity Magnetic Fields | |||||
言語 | ||||||
言語 | eng | |||||
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 | ITG instability | |||||
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 | gyrokinetic simulation | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | plasma transport | |||||
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 |
"Ferrando-Margalet, S.
× "Ferrando-Margalet, S.× Sugama, H.× Watanabe, T.-H." |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "Effects of multiple-helicity magnetic fields on the ion temperature gradient (ITG) instability and on the zonal flow (ZF) evolution are studied with the linear gyrokinetic Vlasov code GKV. The model helical fields corresponding to the standard and inward-shifted axis configurations of the Large Helical Device are used to investigate how ITG mode properties and ZF evolution response to a given source are influenced by the field geometry. It is shown that, in the inward-shifted configuration, the ITG mode growth rate increases slightly while the ZF is sustained for a longer time. In addition, velocity-space structures of the ion perturbed distribution function are numerically obtained which illustrate the validity of the analytical prediction that the plasma inward shift retards the radial drift of the helically trapped particles leading to the enhancement of the ZF response. This supports the conjecture that anomalous transport can be reduced by the ZF generated in the configurations optimized to decrease the neoclassical transport." | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 2007-08-01 |
|||||
報告書番号 | ||||||
NIFS-878 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |