On nonlinear geodesic acoustic modes in tokamak plasmas

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題名:	On nonlinear geodesic acoustic modes in tokamak plasmas
作者:	陳騮;Chen, Liu;Qiu, Zhiyong;Zonca, Fulvio
貢獻者:	理學院物理學系
關鍵詞:	52.30.Gz;52.35.Fp;52.35.Mw;Acoustics;Drift;Evolution;Nonlinear dynamics;Nonlinearity;Plasmas;Plasmas (physics);Second harmonic generation;Tokamak devices;Turbulence;Zonal flow (meteorology)
日期:	2014-07-01
上傳時間:	2026-04-23 12:35:50 (UTC+8)
出版者:	IOP Publishing Ltd.;Les Ulis: EDP Sciences, IOP Publishing and Societ� Italiana di Fisica
摘要:	摘要： It is shown that, in tokamak plasmas, finite drift/banana-orbit width (FOW) effects play crucial roles in the nonlinear evolution of kinetic/geodesic acoustic modes (KGAM/GAM). In particular, it is found that, in contrast to the negligible second-harmonic generation, KGAM/GAM can generate appreciable zero-frequency zonal flow (ZFZF) due to the FOW effects. On the other hand, ZFZF is found to have negligible effects on the dynamics of GAM/KGAM. This route of generating ZFZF has important implications to the nonlinear dynamics of zonal flows and, consequently, drift wave turbulences. 其他題名： EPL 出版者： Les Ulis: EDP Sciences, IOP Publishing and Società Italiana di Fisica 出版日期： 2014-07-01 出處： Europhysics letters, 2014-07, Vol.107 (1), p.15003-p1-15003-p4 資源來源： Institute of Physics Journals 版權： Copyright © EPLA, 2014 識別號： ISSN: 0295-5075 識別號： EISSN: 1286-4854 識別號： DOI: 10.1209/0295-5075/107/15003 識別號： CODEN: EULEEJ
顯示於類別:	[物理學系] 期刊論文

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