Drift wave driven zonal flows in electron-positron-ion plasmas

被引：2
|
作者：
Kaladze, T. D. [1 ,2 ]
Pokhotelov, O. A. [3 ]
Shad, M. [1 ]
机构：
[1] Govt Coll Univ, Dept Phys, Lahore 54000, Pakistan
[2] Tbilisi State Univ, Vekua Inst Appl Math, GE-0186 Tbilisi, Georgia
[3] Russian Acad Sci, Inst Phys Earth, Moscow 123995, Russia
来源：
JOURNAL OF PLASMA PHYSICS | 2010年 / 76卷
基金：
美国国家科学基金会;
关键词：
SHEAR ALFVEN-WAVE; VORTICES;
D O I：
10.1017/S0022377809990869
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：
The generation of large-scale zonal flows by small-scale electrostatic drift waves in electron-positron-ion (EN) plasma is considered. The generation mechanism is based on the parametric excitation of convective cells by finite amplitude drift waves. To describe this process; the Hasegawa-Mima equation generalized for the case of EPI plasma is used. Explicit expressions for the maximum growth rate as well as for the optimal spatial dimensions of the zonal flows are obtained. Dependence of the growth rate on the spectrum purity of the wave packet is also investigated. The relevant instability conditions are determined.
引用
收藏
页码：635 / 643
页数：9
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