Nonlinear excitation of a geodesic acoustic mode by reversed shear Alfvén eignemodes  

作　　者：Yahui WANG Tao WANG Shizhao WEI Zhiyong QIU 王亚辉;王涛;魏士朝;仇志勇(Institute for Fusion Theory and Simulation and Department of Physics,Zhejiang University,Hangzhou 310027,People's Republic of China;Center for Nonlinear Plasma Science and ENEA C.R.Frascati,Frascati 65-00044,Italy)

机构地区：[1]Institute for Fusion Theory and Simulation and Department of Physics,Zhejiang University,Hangzhou 310027,People's Republic of China [2]Center for Nonlinear Plasma Science and ENEA C.R.Frascati,Frascati 65-00044,Italy

出　　处：《Plasma Science and Technology》2022年第2期57-61,共5页等离子体科学和技术（英文版）

基　　金：supported by the National Key R&D Program of China(No.2017YFE0301900);National Natural Science Foundation of China(No.11875233);Users of Excellence Program of Hefei Science Center CAS(No.2021HSC-UE016)。

摘　　要：The parametric decay process of a reversed shear Alfvén eigenmeode(RSAE)into a geodesic acoustic mode and a kinetic RSAE is investigated using nonlinear gyrokinetic theory.The excitation conditions mainly require the pump RSAE amplitude to exceed a certain threshold,which could be readily satisfied in burning plasmas operated in steady-state advanced scenario.This decay process can contribute to thermal plasma heating and confinement improvement.

关 键 词：reversed shear Alfvén eigenmode geodesic acoustic mode gyrokinetic theory nonlinear mode coupling burning plasmas alpha channelling 

分 类 号：TL612[核科学技术—核技术及应用]