Evaluation of deuterium recycling properties by fueling termination in the EAST superconducting tokamak

doi:10.1016/j.nme.2022.101286

	Evaluation of deuterium recycling properties by fueling termination in the EAST superconducting tokamak
	Sakamoto, Mizuki 1; Yu, Yaowei 2; Ashikawa, Naoko 3,4; Gong, Xianzu 2; Xu, Wei 2; Hou, Jilei 2; Cao, Bin 2; Zuo, Guizhong 2; Hu, Jiansheng 2
刊名	NUCLEAR MATERIALS AND ENERGY
	2022-10-01
卷号	33
DOI	10.1016/j.nme.2022.101286
通讯作者	Sakamoto, Mizuki(sakamoto@pre.tsukuba.ac.jp)
英文摘要	Deuterium recycling properties have been investigated in the EAST superconducting tokamak by evaluating the density decay time after the fueling termination. The density decay time of the latter discharge of the experiment of a day is similar to 2.9 s, which is more than three times longer than that of the beginning discharge (similar to 0.88 s), indicating that a repeat of discharges diminishes the wall conditioning effect by lithium coating. However, the difference in deuterium recycling among three magnetic configurations (lower single null, double null, and upper single null) is unclear. The density decay times are 3.3 s and 4.1 s when the strike point (SP) positions are located on the horizontal and vertical plates of the lower outer divertor, showing that the particle exhaust capability becomes stronger as the SP position approaches the pumping slot. Furthermore, the lower hybrid current drive (LHCD) power enhances deuterium recycling since the density decay times of high (similar to 2.7 MW) and low (similar to 0.8 MW) power LHCD discharges are 4.3 s and 1.2 s, respectively. The density decay time in the LHCD discharge linearly increases with an increase in a period of exponential fitting, implying that the recycling coefficient increases during the stop of fueling. However, the density decay time in the ohmic discharge is independent of the fitting time.
资助项目	JSPS-CAS Bilateral Joint Research Projects[GJHZ201984] ; JSPS-CAS Bilateral Joint Research Projects[JPJSBP120197202] ; Users with Excellence Program of Hefei Science Center CAS[2021HSC- UE013]
WOS关键词	H-MODE ; LONG ; PERFORMANCE ; DISCHARGES ; PLASMAS
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000884483800008
资助机构	JSPS-CAS Bilateral Joint Research Projects ; Users with Excellence Program of Hefei Science Center CAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131585]
专题	中国科学院合肥物质科学研究院
通讯作者	Sakamoto, Mizuki
作者单位	1.Univ Tsukuba, Plasma Res Ctr, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058577, Japan 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Natl Inst Fus Sci, 322-6 Oroshi Cho, Toki, Gifu 5095292, Japan 4.SOKENDAI, 322-6 Oroshi Cho, Toki, Gifu 5095292, Japan
推荐引用方式 GB/T 7714	Sakamoto, Mizuki,Yu, Yaowei,Ashikawa, Naoko,et al. Evaluation of deuterium recycling properties by fueling termination in the EAST superconducting tokamak[J]. NUCLEAR MATERIALS AND ENERGY,2022,33.
APA	Sakamoto, Mizuki.,Yu, Yaowei.,Ashikawa, Naoko.,Gong, Xianzu.,Xu, Wei.,...&Hu, Jiansheng.(2022).Evaluation of deuterium recycling properties by fueling termination in the EAST superconducting tokamak.NUCLEAR MATERIALS AND ENERGY,33.
MLA	Sakamoto, Mizuki,et al."Evaluation of deuterium recycling properties by fueling termination in the EAST superconducting tokamak".NUCLEAR MATERIALS AND ENERGY 33(2022).