| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Evolution of the high-field-side radiation belts during the neon seeding plasma discharge in EAST tokamak |
| Ji-Chan Xu(许吉禅)1,†, Liang Wang(王亮)2, Guo-Sheng Xu(徐国盛)2, Yan-Min Duan(段艳敏)2, Ling-Yi Meng(孟令义)2, Ke-Dong Li(李克栋)2, Fang Ding(丁芳)2, Rui-Rong Liang(梁瑞荣)2, Jian-Bin Liu(刘建斌)2 |
1. School of Mechanical Engineering, Anhui University of Science & Technology, Huainan 232001, China;
2. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China |
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Abstract 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.
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Received: 18 July 2022
Revised: 05 September 2022
Accepted manuscript online:
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PACS:
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52.55.Fa
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(Tokamaks, spherical tokamaks)
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94.30.Xy
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(Radiation belts)
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52.25.Vy
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(Impurities in plasmas)
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28.52.-s
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(Fusion reactors)
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| Fund: 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), and Anhui Provincial Natural Science Foundation (Grant No. 2008085QA38). |
Corresponding Authors:
Ji-Chan Xu
E-mail: jichanxu@aust.edu.cn
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Cite this article:
Ji-Chan Xu(许吉禅), Liang Wang(王亮), Guo-Sheng Xu(徐国盛), Yan-Min Duan(段艳敏), Ling-Yi Meng(孟令义), Ke-Dong Li(李克栋), Fang Ding(丁芳), Rui-Rong Liang(梁瑞荣), Jian-Bin Liu(刘建斌), and EAST Team Evolution of the high-field-side radiation belts during the neon seeding plasma discharge in EAST tokamak 2022 Chin. Phys. B 31 105203
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