Excitation of zonal flow by drift waves in toroidal plasmas

被引：301
作者：
Chen, L [1 ]
Lin, ZH
White, R
机构：
[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[2] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA
来源：
PHYSICS OF PLASMAS | 2000年 / 7卷 / 08期
关键词：
D O I：
10.1063/1.874222
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
An analytical dispersion relation is derived which shows that, in toroidal plasmas, zonal flows can be spontaneously excited via modulations in the radial envelope of a single-n coherent drift wave, with n the toroidal mode number. Predicted instability features are verified by three-dimensional global gyrokinetic simulations of the ion-temperature-gradient mode. Nonlinear equations for mode amplitudes demonstrate saturation of the linearly unstable pump wave and nonlinear oscillations of the drift-wave intensity and zonal flows, with a parameter-dependent period doubling route to chaos. (C) 2000 American Institute of Physics. [S1070-664X(00)01208-8].
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收藏
页码：3129 / 3132
页数：4
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