Abstract The effect of tearing modes on the confinement of runaway electrons is studied in Experimental Advanced Superconducting Tokamak (EAST). The general tendency of the radial diffusion coefficient of runaway electrons (REs) Dr is derived based on the time response relation between the tearing modes and runaway electrons. The results indicate that, the magnetic fluctuations of tearing modes will enhance the radial diffusion of runaway electrons when the magnetic island is small. Following the increasing of the magnetic fluctuations of the tearing modes, the formed large magnetic island may weaken the radial diffusion of runaway electrons. The results can be important to understand the confinement of runaway electrons when large magnetic islands exist in the plasma.
Fund: Project partly supported by the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 2021445), the Science Foundation of Institute of Plasma Physics of Chinese Academy of Sciences (Grant No. DSJJ-2022-05), and partly supported by the Comprehensive Research Facility for Fusion Technology Program of China (Grant No. 2018-000052-73-01-001228).
Rui-Jie Zhou(周瑞杰) Effect of tearing modes on the confinement of runaway electrons in Experimental Advanced Superconducting Tokamak 2023 Chin. Phys. B 32 075204
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