Characterization of plasma current quench during disruptions at HL-2A

被引:7
作者
Zhu, Jinxia [1 ]
Zhang, Yipo [2 ]
Dong, Yunbo [2 ]
机构
[1] Sichuan Univ Arts & Sci, Sch Intelligent Mfg, Dazhou 635000, Peoples R China
[2] Southwestern Inst Phys, Chengdu 610041, Peoples R China
基金
中国国家自然科学基金;
关键词
tokamak; disruption; current quench; RUNAWAY ELECTRONS;
D O I
10.1088/2058-6272/aa5ff2
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 most essential assumptions of physics for the evaluation of electromagnetic forces on the plasma-facing components due to a disruption-induced eddy current are characteristics of plasma current quenches including the current quench rate or its waveforms. The characteristics of plasma current quenches at HL-2A have been analyzed during spontaneous disruptions. Both linear decay and exponential decay are found in the disruptions with the fastest current quenches. However, there are two stages of current quench in the slow current quench case. The first stage with an exponential decay and the second stage followed by a rapid linear decay. The faster current quench rate corresponds to the faster movement of plasma displacement. The parameter regimes on the current quench time and the current quench rates have been obtained from disruption statistics at HL-2A. There exists no remarkable difference for distributions obtained between the limiter and the divertor configuration. This data from HL-2A provides basic data of the derivation of design criteria for a large-sized machine during the current decay phase of the disruptions.
引用
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页数:5
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