Kinetic Theories of Geodesic Acoustic Modes: Radial Structure, Linear Excitation by Energetic Particles and Nonlinear Saturation

被引：35
|
作者：
Qiu Zhiyong [1 ]
Zonca, Fulvio [1 ,2 ]
Chen Liu [1 ,3 ]
机构：
[1] Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310027, Zhejiang, Peoples R China
[2] Assoc Euratom ENEA Fus, I-00044 Frascati, Italy
[3] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
来源：
PLASMA SCIENCE & TECHNOLOGY | 2011年 / 13卷 / 03期
关键词：
geodesic acoustic mode; continuum; energetic particles; wave particle trapping; ALFVEN-WAVE; PLASMA; TOKAMAKS; DYNAMICS; BEAM;
D O I：
10.1088/1009-0630/13/3/01
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：
Geodesic acoustic modes (GAMs) are oscillating zonal mode structures unique to toroidal plasmas and are capable of regulating microscopic turbulence and associated transports. In this paper, three important aspects of GAM dynamics are investigated, namely (1) GAM continuous spectrum and its mode conversion to kinetic GAM (KGAM); (2) linear excitation of energetic particle induced GAM (EGAM) and its coupling to the GAM continuum, and (3) nonlinear saturation of EGAM via wave particle trapping. The analogy between the GAM-EGAM dynamics and the well known beam-plasma instability are also discussed.
引用
收藏
页码：257 / 266
页数：10
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