Recent advances in high-β_(N) experiments and magnetohydrodynamic instabilities with hybrid scenarios in the HL-2A Tokamak

作     者：Wei Chen Liming Yu Min Xu Xiaoquan Ji Zhongbing Shi Xiaoxue He Zhengji Li Yonggao Li Tianbo Wang Min Jiang Shaobo Gong Jie Wen Peiwan Shi Zengchen Yang Kairui Fang Jia Li Lai Wei Wulv Zhong Aiping Sun Jianyong Cao Xingyu Bai Jiquan Li Xuantong Ding Jiaqi Dong Qingwei Yang Yi Liu Longwen Yan Zhengxiong Wang Xuanru Duan Wei Chen;Liming Yu;Min Xu;Xiaoquan Ji;Zhongbing Shi;Xiaoxue He;Zhengji Li;Yonggao Li;Tianbo Wang;Min Jiang;Shaobo Gong;Jie Wen;Peiwan Shi;Zengchen Yang;Kairui Fang;Jia Li;Lai Wei;Wulv Zhong;Aiping Sun;Jianyong Cao;Xingyu Bai;Jiquan Li;Xuantong Ding;Jiaqi Dong;Qingwei Yang;Yi Liu;Longwen Yan;Zhengxiong Wang;Xuanru Duan

作者机构：Joint Laboratory for Fusion Product and Energetic ParticleSouthwestern Institute of PhysicsP.O.Box 432Chengdu 610041China Key Laboratory of Materials Modification by Beams of the Ministry of EducationSchool of PhysicsDalian University of TechnologyDalian 116024China 

出 版 物：《Fundamental Research》 (自然科学基础研究（英文版）)

年 卷 期：2022年第2卷第5期

页      面：667-673页

学科分类：080103[工学-流体力学] 08[工学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported in part by the ITER-CN(Grants No.2017YFE0301202 and 2019YFE03020000) by National Natural Science Foundation of China(Grants No.12125502,11875021 and 11835010) by Sichuan Foundation(Grant No.2020JDJQ0070) 

主　　题：High-β_(N) Transport barrier Hybrid scenario Bootstrapcurrent Magnetohydrodynamic 

摘      要：Over the past several years,high-β_(N) experiments have been carried out on *** high-β_(N) is realized using double transport barriers(DTBs)with hybrid scenarios.A stationary high-β_(N) (2)scenario was obtained by pure neutral-beam injection(NBI)*** high performance was also achieved,corresponding to β_(N)≥3,ne/ne_(G)∼0.6,H_(98)∼1.5,f_(bs)∼30%,q_(95)∼4.0,and𝐺∼*** high-β_(N) scenario was successfully modeled using integrated simulation codes,that is,the one modeling framework for integrated tasks(OMFIT).In high-𝛽𝑁plasmas,magnetohydrodynamic(MHD)instabilities are abundant,including low-frequency global MHD oscilla-tion with n=1,high-frequency coherent mode(HCM)at the edge,and neoclassical tearing mode(NTM)and Alfvénic modes in the *** some high-β_(N) discharges,it is observed that the NTMs with m/n=3/2 limit the growth of the plasma energy and decrease β_(N).The low-n global MHD oscillation is consistent with the coupling of destabilized internal(m/n=1/1)and external(m/n=3/1 or 4/1)modes,and plays a crucial role in triggering the onset of *** high-β_(N) on HL-2A suggests that core-edge interplay is key to the plasma confinement enhancement *** to enhance β_(N) will contribute to future plasma operation,such as international thermonuclear experimental reactor.