Suppression of runaway electrons by mode locking during disruptions on J-TEXT

被引：17

作者：

Chen, Z. Y. ^{[1
,2
]}

Lin, Z. F. ^{[1
]}

Huang, D. W. ^{[1
]}

Tong, R. H. ^{[1
]}

Hu, Q. M. ^{[1
]}

Wei, Y. N. ^{[1
]}

Yan, W. ^{[1
]}

Dai, A. J. ^{[1
]}

Zhang, X. Q. ^{[1
]}

Rao, B. ^{[1
]}

Yang, Z. J. ^{[1
]}

Gao, L. ^{[1
]}

Dong, Y. B. ^{[3
]}

Zeng, L. ^{[4
]}

Ding, Y. H. ^{[1
]}

Wang, Z. J. ^{[1
]}

Zhang, M. ^{[1
]}

Zhuang, G. ^{[1
]}

Liang, Y. ^{[1
]}

Pan, Y. ^{[1
]}

Jiang, Z. H. ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Int Joint Res Lab Magnet Confinement Fusion & Pla, State Key Lab Adv Electromagnet Engn & Technol, Sch Elect & Elect Engn, Wuhan 430074, Hubei, Peoples R China

[2] Chengdu Univ, Chengdu 610106, Sichuan, Peoples R China

[3] Southwestern Inst Phys, POB 432, Chengdu 610041, Sichuan, Peoples R China

[4] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China

来源：

NUCLEAR FUSION | 2018年 / 58卷 / 08期

基金：

中国国家自然科学基金;

关键词：

runaway electron; disruption; mode locking; magnetic perturbation; MAJOR DISRUPTIONS; GENERATION; TERMINATION; MITIGATION; LOSSES; JET;

D O I：

10.1088/1741-4326/aab2fc

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：

The generation of runaway electrons during disruptions poses a serious threat for the operation of ITER. The efficiency of the injection of large amounts of impurities by massive gas injection or shattered pellet injection to achieve runaway suppression might be compromised due to low gas mixture efficiency and the high Rosenbluth density for runaway suppression. The transport of runaway electrons is dominated by magnetic perturbations. The magnetic perturbations have the advantage of expelling the runaway seeds before they reach high energy. Robust runaway suppression has been reached on J-TEXT with mode locking by the application of m/n = 2/1 resonant magnetic perturbations before the thermal quench. The mode locking implemented large magnetic islands inside the plasma which acted as an explosive bomb during disruptions and led to stronger stochasticity in the whole plasma cross section. The NIMROD simulation indicates that this strong stochasticity expels the runaway seeds and results in runaway free disruptions on J-TEXT. This might provide an alternative runaway suppression technique during disruptions for large-scale tokamaks.

引用

页数：7