Excitation of RSAEs during Sawteeth-Like Oscillation in EAST

作     者：Ming Xu Guoqiang Zhong Baolong Hao Wei Shen Liqun Hu Wei Chen Zhiyong Qiu Xuexi Zhang Youjun Hu Yingying Li Hailin Zhao Haiqing Liu Bo Lyu the EAST Team 徐明;钟国强;郝保龙;申伟;胡立群;陈伟;仇志勇;张学习;胡友俊;李颖颖;赵海林;刘海庆;吕波;the EAST Team

作者机构：Institute of Plasma PhysicsChinese Academy of Sciences(ASIPP)Hefei 230031China Advanced Energy Research CenterShenzhen UniversityShenzhen 518060China Southwestern Institute of PhysicsChengdu 610041China Department of PhysicsZhejiang UniversityHangzhou 310027China Enn Science and Technology Development Co.LtdLangfang 065001China Hebei Key Laboratory of Compact FusionLangfang 065001China 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2021年第38卷第8期

页      面：62-66页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

基　　金：the National MCF Energy R&D Program of China(Grant Nos.2019YFE03020000 and 2018YFE0304100) the National Nature Science Foundation of China(Grant Nos.11975267 and 11975273) 

主　　题：density neutral reversed 

摘      要：The excitation condition of reversed shear Alfven eigenmodes(RSAEs)has been investigated during sawtoothlike oscillation in the EAST *** sawtooth-like phenomena can be reproduced in the configuration of reversed magnetic shear,and the threshold gradient of electron temperature is formed accordingly,together with the increasing of the confinement of thermal *** distribution function of energetic ions density is altered dramatically when the neutral beam is switched from NBI1 L(tangent)to NBI1 R(perpendicular),which can be captured by the measurement of radial neutron *** RSAEs are excited easily in the vicinity of q_(min)(1.99 m≤R≤2.06 m)for the injection of neutral beam with perpendicular direction,which should be excited by the steep gradient of energetic ions ***,the excitation of RSAEs and the formation of threshold gradient of electron temperature can take place concurrently,which means that the neutral beam with perpendicular injection is beneficial for the establishment of internal transport barrier.