Preliminary study of divertor particle exhaust in the EAST superconducting tokamak

Huan LIU (刘欢); Liang WANG (王亮); Guosheng XU (徐国盛); Fang DING (丁芳); Jianbin LIU (刘建斌); Jichan XU (许吉禅); Wei FENG (冯威); Guozhong DENG (邓国忠); Xingwei ZHENG (郑星炜); Yaowei YU (余耀伟); Hang SI (司杭); Haiqing LIU (刘海庆); Qingquan YANG (杨清泉); Zhen SUN (孙震); Houyang GUO (郭后扬)

doi:10.1088/2058-6272/aa6f5a

Plasma Science and Technology > 2017 > 19(9): 95101-095101. > DOI: 10.1088/2058-6272/aa6f5a

Huan LIU (刘欢), Liang WANG (王亮), Guosheng XU (徐国盛), Fang DING (丁芳), Jianbin LIU (刘建斌), Jichan XU (许吉禅), Wei FENG (冯威), Guozhong DENG (邓国忠), Xingwei ZHENG (郑星炜), Yaowei YU (余耀伟), Hang SI (司杭), Haiqing LIU (刘海庆), Qingquan YANG (杨清泉), Zhen SUN (孙震), Houyang GUO (郭后扬). Preliminary study of divertor particle exhaust in the EAST superconducting tokamak[J]. Plasma Science and Technology, 2017, 19(9): 95101-095101. DOI: 10.1088/2058-6272/aa6f5a

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Preliminary study of divertor particle exhaust in the EAST superconducting tokamak

1 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China 2 University of Science and Technology of China, Hefei 230026, People’s Republic of China 3 General Atomics, PO Box 85608, San Diego, CA 92186, United States of America

Funds: This work was supported by National Magnetic Confinement Fusion Science Program of China under Contract Nos. 2013GB107003, 2013GB106000, 2015GB101000, and National Natural Science Foundation of China under Grant Nos. 11575236, 11422546, 11575235 and 11261140328 as well as the Thousand Talent Plan of China. This work was also supported by the CASHIPS Director’s Fund, Grant No. YZJJ201610.

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Received Date: January 08, 2017

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Abstract

Abstract

The particle exhaust of the upper tungsten and lower carbon divertors in EAST has been preliminarily studied during the 2016 experimental campaign. The density decay time during terminating gas puffing has been employed as a key parameter to evaluate the divertor particle exhaust performance. Comparative plasma discharges have been carried out on the particle exhaust performance between two toroidal field directions in the upper single null and lower single null divertor configurations. This work has enhanced the understanding of the effects of the in–out asymmetry and divertor geometry on the efficiency of the divertor particle exhaust. In addition, the sensitivity of the particle exhaust capability on different strike point locations has been analyzed. The experimental results are expected to provide important information on the future upgrade of EAST bottom divertor and facilitate the realization of longer pulse operation.
- divertor,
- particle exhaust,
- decay time,
- strike point location

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References (26)

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