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
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.
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).
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
[1] Leonard A W 2018 Plasma Phys. Controlled Fusion60 044001 [2] Pitcher C S and Stangeby P C 1997 Plasma Phys. Controlled Fusion39 779 [3] Lipschultz B, LaBombard B, Marmar E, Pickrell M, Terry J, Watterson R and Wolfe S M 1984 Nucl. Fusion24 977 [4] Luo Y, Ding F, Wang L, et al. 2020 Plasma Phys. Controlled Fusion62 075005 [5] Stacey W M, Friis Z W, Petrie T W and Leonard A W 2005 Phys. Plasmas12 072518 [6] Chankin A V 2004 Phys. Plasmas11 1484 [7] Kallenbach A, Bobkov V, Braun F, Herrmann A, Hohnle H, McDermott R M, Neu R, Noterdaeme J M, Putterich T, Schweinzer J, Stober J, Strumberger E, Suttrop W, Wagner D and Zohm H 2012 IEEE T. Plasma Sci.40 605 [8] Kallenbach A, Dux R, Fuchs J C, Fischer R, Geiger B, Giannone L, Herrmann A, Lunt T, Mertens V, McDermott R, Neu R, Puetterich T, Rathgeber S, Rohde V, Schmid K, Schweinzer J, Treutterer W and ASDEX Upgrade Team 2010 Plasma Phys. Controlled Fusion52 055002 [9] Goetz J A, Lipschultz B, Pitcher C S, Terry J L, Bonoli P T, Rice J E and Wukitch S J 1999 J. Nucl. Mater.266—269 354 [10] Guillemaut C, Lennholm M, Harrison J, Carvalho I, Valcarcel D, Felton R, Griph S, Hogben C, Lucock R, Matthews G F, Von Thun C P, Pitts R A and Wiesen S 2017 Plasma Phys. Controlled Fusion59 045001 [11] Maddison G P, Giroud C, McCormick G K, et al. 2011 Nucl. Fusion51 082001 [12] Brunner D, Burke W, Kuang A Q, LaBombard B, Lipschultz B and Wolfe S 2016 Rev. Sci. Instrum.87 023504 [13] Wang L, Guo H Y, Ding F, et al. 2019 Nucl. Fusion59 086036 [14] Li K D, Xu G S, Yuan Q P, et al. 2021 Nucl. Mater. Energy26 100867 [15] Xu G S, Yuan Q P, Li K D, et al. 2020 Nucl. Fusion60 086001 [16] Wu K, Yuan Q, Xu G, et al. 2021 Plasma Phys. Controlled Fusion63 105004 [17] Wan B N, Li J G, Guo H Y, Liang Y F, Xu G S, Wang L, Gong X Z, Garofalo A and EAST Collaborators 2015 Nucl. Fusion55 104015 [18] Wan B N, Liang Y F, Gong X Z, et al. 2017 Nucl. Fusion57 102019 [19] Yao D M, Luo G N, Zhou Z B, Cao L, Li Q, Wang W J, Li L, Qin S G, Shi Y L, Liu G H and Li J G 2016 Phys. Script.T167 014003 [20] Wang L, Xu G S, Guo H Y, et al. 2012 Nucl. Fusion52 063024 [21] Xu J C, Wang L, Xu G S, Luo G N, Yao D M, Li Q, Cao L, Chen L, Zhang W, Liu S C, Wang H Q, Jia M N, Feng W, Deng G Z, Hu L Q, Wan B N, Li J, Sun Y W and Guo H Y 2016 Rev. Sci. Instrum.87 083504 [22] Duan Y M, Hu L Q, Chen K Y, Du W, Zhang L and EAST Team 2013 J. Nucl. Mater.438 S338 [23] Gao W, Huang J, Su J, Fu J, Chen Y, Gao W and Wu Z 2021 Chin. Phys. B30 025201 [24] Mao H M, Ding F, Luo G N, Hu Z H, Chen X H, Xu F, Yang Z S, Chen J B, Wang L, Ding R, Zhang L, Gao W, Xu J C and Wu C R 2017 Rev. Sci. Instrum.88 043502 [25] Chen J B, Duan Y M, Yang Z S, Wang L, Wu K, Li K D, Ding F, Mao H M, Xu J C, Gao W, Zhang L, Wu J H, Luo G N and EAST Team 2017 Chin. Phys. B26 095205 [26] He T, Yang Z, Wang L, et al. 2021 Plasma Phys. Controlled Fusion63 085001 [27] Eldon D, Wang H Q, Wang L, Barr J, Ding S, Garofalo A, Gong X Z, Guo H Y, Järvinen A E, Li K D, McClenaghan J, McLean A G, Samuell C M, Watkins J G, Weisberg D and Yuan Q P 2021 Nucl. Mater. Energy27 100963 [28] Li K, Yang Z, Wang H, et al. 2021 Nucl. Fusion61 066013 [29] Wang L, Xu G S, Hu J S, et al. 2021 J. Fusion Energ.40 3 [30] Stangeby P C 2018 Plasma Phys. Controlled Fusion60 044022 [31] Martin Y R, Takizuka T and ITPA CDBM H-mode Threshold Database Working Group 2008 J. Phy. Conf. Ser.123 012033 [32] Ye Y, Xu G S, Tao Y Q, et al. 2021 Nucl. Fusion61 116032 [33] Reimold F, Wischmeier M, Bernert M, Potzel S, Kallenbach A, Müller H W, Sieglin B and Stroth U 2015 Nucl. Fusion55 033004 [34] Reimold F, Wischmeier M, Bernert M, Potzel S, Coster D, Bonnin X, Reiter D, Meisl G, Kallenbach A, Aho-Mantila L and Stroth U 2015 J. Nucl. Mater.463 128 [35] Potzel S, Wischmeier M, Bernert M, Dux R, Reimold F, Scarabosio A, Brezinsek S, Clever M, Huber A, Meigs A and Stamp M 2015 J. Nucl. Mater.463 541 [36] Kelly F, Maingi R, Maqueda R, Menard J and Paul S 2009 J. Nucl. Mater.390—391 436 [37] Glöggler S, Wischmeier M, Fable E, Solano E R, Sertoli M, Bernert M, Calabró G, Chernyshova M, Huber A, Kowalska-Strzȩciwilk E, Lowry C, de la Luna E, Maggi C F, Stroth U, Sun H J, Reinke M L and Wiesen S 2019 Nucl. Fusion59 126031
Reduction of impurity confinement time by combined heating of LHW and ECRH in EAST Zong Xu(许棕), Zhen-Wei Wu(吴振伟), Ling Zhang(张凌), Yue-Heng Huang(黄跃恒), Wei Gao(高伟), Yun-Xin Cheng(程云鑫), Xiao-Dong Lin(林晓东), Xiang Gao(高翔), Ying-Jie Chen(陈颖杰), Lei Li(黎嫘), Yin-Xian Jie(揭银先), Qing Zang(臧庆), Hai-Qing Liu(刘海庆), and EAST team. Chin. Phys. B, 2021, 30(7): 075205.
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