Nonlinear saturation of reversed shear Alfvén eigenmode via high-frequency quasi-mode generation  

作　　者：Zhiwen CHENG Guangyu WEI Lei YE Zhiyong QIU 程志文;魏广宇;叶磊;仇志勇(Institute for Fusion Theory and Simulation,School of Physics,Zhejiang University,Hangzhou 310027,People’s Republic of China;CAS Key Laboratory of Frontier Physics in Controlled Nuclear Fusion and Institutes of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China;Center for Nonlinear Plasma Science,ENEA C.R.Frascati,Frascati 00044,Italy)

机构地区：[1]Institute for Fusion Theory and Simulation,School of Physics,Zhejiang University,Hangzhou 310027,People’s Republic of China [2]CAS Key Laboratory of Frontier Physics in Controlled Nuclear Fusion and Institutes of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China [3]Center for Nonlinear Plasma Science,ENEA C.R.Frascati,Frascati 00044,Italy

出　　处：《Plasma Science and Technology》2025年第1期17-22,共6页等离子体科学和技术(英文版)

基　　金：supported by the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDB0790000);the Collaborative Innovation Program of Hefei Science Center,CAS(No.2022HSC-CIP008);National Natural Science Foundation of China(Nos.12275236 and 12261131622)。

摘　　要：A nonlinear saturation mechanism for reversed shear Alfvén eigenmode(RSAE)is proposed and analyzed,and is shown to be of relevance to typical reactor parameter region.The saturation is achieved through the generation of high-frequency quasi-mode due to nonlinear coupling of two RSAEs,which is then damped due to coupling with the shear Alfvén continuum,and leads to the nonlinear saturation of the primary RSAEs.An estimation of the nonlinear damping rate is also provided.

关 键 词：reversed shear Alfvén eigenmode nonlinear mode coupling continuum damping gyrokinetic theory 

分 类 号：TL631.24[核科学技术—核技术及应用]