Magnetic island formation and rotation braking induced by low- Z impurity penetration in an EAST plasma

Nuclear Fushion

article

Shiyong Zeng¹  Ping Zhu²  Ruijie Zhou⁴  Ming Xu⁴ 

[1] Department of Engineering and Applied Physics, University of Science and Technology of China;International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology;Department of Engineering Physics, University of Wisconsin-Madison;Institute of Plasma Physics, Chinese Academy of Sciences

关键词: impurity radiation;    tearing mode;    magnetic island braking;    higher-n mode;    island formation;   

DOI  :  10.1088/1741-4326/acbdab

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

Recent observations of the successive formations of the 4/1,3/1 , and 2/1magnetic islands as well as the subsequent braking of the 2/1mode during a low- Zimpurity penetration process in EAST experiments are well reproduced in our 3 Dresistive MHD simulations. The enhanced parallel current perturbation induced by impurity radiation predominately contributes to the tearing mode growth, and the 2/1island rotation is mainly damped by the impurity accumulation as results of the influence from highnmodes.

【 授权许可】

Unknown