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Evolution of the high-field-side radiation belts during the neon seeding plasma discharge in EAST tokamak

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摘要 Divertor detachment achieved by injecting impurities or increasing density is always accompanied with various local radiation phenomena in the boundary or core plasma. This paper presents the formation and evolution of the high-field-side(HFS) radiation belts during the neon seeding plasma discharge in upper single null configuration with two directions of toroidal magnetic field in EAST tokamak. The neon mixed with deuterium seeding can induce the divertor detachment with strong radiation belts in the HFS scrape-off layer(SOL) region. With the increase of the radiation power, the plasma discharge will transit from H-mode to L-mode, and meanwhile the radiation belts move away from the near X-point to HFS SOL. When the radiation power is high enough, the radiation belts begin to move further to the other X-point along the HFS SOL, and even cause plasma disruption. The results indicate that the behavior of the radiation belts is related to the radiation power, plasma confinement performance and state of divertor detachment, which is useful for developing better feedback control methods to achieve high-performance radiative divertor operation mode.
作者 Ji-Chan Xu Liang Wang Guo-Sheng Xu Yan-Min Duan Ling-Yi Meng Ke-Dong Li Fang Ding Rui-Rong Liang Jian-Bin Liu EAST Team 许吉禅;王亮;徐国盛;段艳敏;孟令义;李克栋;丁芳;梁瑞荣;刘建斌;EAST Team(School of Mechanical Engineering,Anhui University of Science&Technology,Huainan 232001,China;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,China)
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第10期458-466,共9页 中国物理B(英文版)
基金 Project supported by the National Magnetic Confinement Fusion Energy Research and Development Program of China (Grant Nos. 2017YFE0301300 and 2019YFE03030000) the National Natural Science Foundation of China (Grant Nos. 12005004, 11922513, and U19A20113) Anhui Provincial Natural Science Foundation (Grant No. 2008085QA38)。
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