Kinetic theory of geodesic acoustic modes in toroidal plasmas:a brief review

作     者：Zhiyong QIU Liu CHEN Fulvio ZONCA 

作者机构：Institute for Fusion Theory and Simulation and Department of PhysicsZhejiang University Department of Physics and AstronomyUniversity of California ENEAFusion and Nuclear Safety Department 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2018年第20卷第9期

页      面：24-49页

核心收录：

学科分类：07[理学] 070204[理学-等离子体物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by National Natural Science Foundation of China under grant Nos.11575157 and 11235009 the National Magnetic Confinement Fusion Research Program under Grants Nos.2013GB104004 and 2013GB111004 Fundamental Research Fund for Chinese Central Universities under Grant No.2017FZA3004 EUROfusion Consortium under grant agreement No.633053 US DoE Grants 

主　　题：geodesic acoustic mode kinetic theory nonlinear physics energetic particle physics 

摘      要：Geodesic acoustic modes（GAM） are oscillating zonal structures unique to toroidal plasmas,and have been extensively studied in the past decades due to their potential capabilities of regulating microscopic turbulences and associated anomalous transport.This article reviews linear and nonlinear theories of GAM;with emphases on kinetic treatment,system nonuniformity and realistic magnetic geometry,in order to reflect the realistic experimental conditions.Specifically,in the linear physics,the resonant wave-particle interactions are discussed,with the application to resonant excitation by energetic particles（EPs）.The theory of EP-induced GAM（EGAM） is applied to realistic devices for the interpretation of experimental observations,and global effects due to coupling to GAM continuum are also discussed.Meanwhile,in the nonlinear physics,the spontaneous GAM excitation by microscale turbulences is reviewed,including the effects of various system nonuniformities.A unified theoretical framework of GAM/EGAM is then constructed based on our present understandings.The first-principle-based GAM/EGAM theories reviewed here,thus,provide the tools needed for the understanding and interpretation of experimental/numerical results.