Runaway electrons suppression by the resonant magnetic perturbations during disruptions on J-TEXT
Abstract
The runaway electrons (REs) generated during disruptions pose a serious problem for the safe operation of tokamaks. One optional method for REs suppression is external applied resonant magnetic perturbations (RMP). The combined effect of different modes of RMP on the REs suppression has been investigated on the J-TEXT tokamak. It was found that m/n=3/1 mode RMP with an appropriate amplitude was beneficial for the REs suppression. The runaway current can be significantly suppressed by 2/1 mode RMP with high strength. With the combination of 2/1 mode and 3/1 mode RMP, the performance of REs mitigation was different. By applying a high strength of 2/1 RMP combined with 3/1 mode RMP, remarkable enhancement of runaways was found compared to the case of 2/1 mode RMP only. This findings implied that the 3/1 component of RMP might play an important role in the REs suppression during disruption.
The authors are very grateful to help with J-TEXT team. This work was partially supported by the National Natural Science Foundation of China (Nos. 11775089, 71762031 and 11575068) and by the National Magnetic Confinement Fusion Science Program (Nos. 2015GB111002, 2015GB104002 and 2015GB104004).- Publication:
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APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- 2018
- Bibcode:
- 2018APS..DPPT11087L