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

doi:10.1088/1674-1056/ac935a

中国物理B ›› 2022, Vol. 31 ›› Issue (10): 105203-105203.doi: 10.1088/1674-1056/ac935a

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

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

收稿日期:2022-07-18 修回日期:2022-09-05 出版日期:2022-10-16 发布日期:2022-09-27
通讯作者: Ji-Chan Xu E-mail:jichanxu@aust.edu.cn
基金资助:
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).

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

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

Received:2022-07-18 Revised:2022-09-05 Online:2022-10-16 Published:2022-09-27
Contact: Ji-Chan Xu E-mail:jichanxu@aust.edu.cn
Supported by:
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).

摘要/Abstract

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.

关键词: high-field-side, radiation belts, neon seeding, EAST

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.

Key words: high-field-side, radiation belts, neon seeding, EAST

中图分类号: (Tokamaks, spherical tokamaks)

52.55.Fa

94.30.Xy (Radiation belts) 52.25.Vy (Impurities in plasmas) 28.52.-s (Fusion reactors)

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[J]. 中国物理B, 2022, 31(10): 105203-105203.

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

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

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