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

Jinxia ZHU (竹锦霞); Yipo ZHANG (张轶泼); Yunbo DONG (董云波); HL-A Team

doi:10.1088/2058-6272/aa5ff2

Plasma Science and Technology > 2017 > 19(5): 55101-055101. > DOI: 10.1088/2058-6272/aa5ff2

Jinxia ZHU (竹锦霞), Yipo ZHANG (张轶泼), Yunbo DONG (董云波), HL-A Team. Characterization of plasma current quench during disruptions at HL-2A[J]. Plasma Science and Technology, 2017, 19(5): 55101-055101. DOI: 10.1088/2058-6272/aa5ff2

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

1 School of Intelligent Manufacturing, Sichuan University of Arts and Science, Dazhou 635000, People’s Republic of China 2 Southwestern Institute of Physics, Chengdu 610041, People’s Republic of China

Funds: This work was partially supported by National Natural Science Foundation of China (No. 11375004) and by the National Science and Technology Major Project of the Ministry of Science and Technology of China (No. 2014GB109003).

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Received Date: January 04, 2017

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Abstract

Abstract

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 con?guration. 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.
- tokamak,
- disruption,
- current quench

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References (14)

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