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

被引：2
|
作者：
Zeng, Shiyong [1 ]
Zhu, Ping [2 ,3 ]
Zhou, Ruijie [4 ]
Xu, Ming [4 ]
机构：
[1] Univ Sci & Technol China, Dept Engn & Appl Phys, Hefei 230026, Anhui, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, Int Joint Res Lab Magnet Confinement Fus & Plasma, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Hubei, Peoples R China
[3] Univ Wisconsin Madison, Dept Engn Phys, Madison, WI 53706 USA
[4] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
来源：
NUCLEAR FUSION | 2023年 / 63卷 / 04期
基金：
中国国家自然科学基金;
关键词：
impurity radiation; tearing mode; magnetic island braking; higher-n mode; island formation; DENSITY LIMIT DISRUPTIONS; RESISTIVE INSTABILITIES; TEARING MODES; CURVATURE; DYNAMICS;
D O I：
10.1088/1741-4326/acbdab
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Recent observations of the successive formations of the 4/1, 3/1, and 2/1 magnetic islands as well as the subsequent braking of the 2/1 mode during a low-Z impurity penetration process in EAST experiments are well reproduced in our 3D resistive MHD simulations. The enhanced parallel current perturbation induced by impurity radiation predominately contributes to the tearing mode growth, and the 2/1 island rotation is mainly damped by the impurity accumulation as results of the influence from high n modes.
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页数：12
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