Modelling of tungsten impurity edge transport and screening for different divertor conditions in EAST

doi:10.1088/1741-4326/ac8fa4

	Modelling of tungsten impurity edge transport and screening for different divertor conditions in EAST
	Wang, Hui 2,3; Xu, Guoliang 2; Ding, Rui 2; Liu, Xiaoju 2; Si, Hang 2; Zhang, Qing 2; Ding, Fang 2; Zhu, Dahuan 2; Yan, Rong 2; Xie, Hai 2
刊名	NUCLEAR FUSION
	2022-12-01
卷号	62
关键词	divertor tungsten erosion impurity transport EAST DIVIMP
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac8fa4
通讯作者	Xu, Guoliang(guoliang.xu@ipp.ac.cn) ; Ding, Rui(rding@ipp.ac.cn)
英文摘要	Tungsten (W) transport and screening in the edge plasma are investigated for EAST high dissipative divertor conditions. By combining the 1D impurity fluid model (1DImpFM) and the two-point model formatting (2PMF), W screening is proved to be enhanced for high upstream plasma density conditions, mainly because the impurity temperature gradient velocity decreases with the increase of the upstream plasma density. Based on dedicated EAST density ramp-up experiments, 2D simulations of W erosion and transport are carried out for different levels of dissipative divertor conditions by using the SOLPS-DIVIMP code package, and the modeling results are benchmarked with the 1DImpFM analytic model. The prompt-redeposition, the divertor screening, and the main SOL screening are quantitatively analyzed. For detached divertor conditions, the increase in the W ionization length reduces the prompt redeposition rate, but both the divertor screening and SOL screening are reinforced. The 1DImpFM can interpret well the W leakage in the near separatrix region; however, the 2D simulations suggest that the impurity pressure gradient force which is neglected by the 1DImpFM plays an important role, especially in the far-SOL region. With the divertor condition varied from the high-recycling regime to the deep detachment regime, the W source moves from the near strike point region to the far SOL, and thus makes the W transport in the far SOL more important. Therefore, the impurity pressure gradient force cannot be neglected for edge W transport analysis, especially for the detached divertor conditions.
资助项目	National Natural Science Foundation of China[12022511] ; National Natural Science Foundation of China[12005143] ; National Natural Science Foundation of China[12075283] ; National MCF Energy R&D Program of China[2022YFE03180100] ; National MCF Energy R&D Program of China[2019YFE03080100] ; Key Research Program of Frontier Sciences, CAS[ZDBS-LY-SLH010] ; Science Foundation of Institute of Plasma Physics, Chinese Academy of Sciences[DSJJ-2021-02] ; Collaborative Innovation Program of Hefei Science Center Chinese Academy of Sciences[2020HSC-CIP015]
WOS关键词	PLASMA ; LAYER ; FLOW
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000864447700001
资助机构	National Natural Science Foundation of China ; National MCF Energy R&D Program of China ; Key Research Program of Frontier Sciences, CAS ; Science Foundation of Institute of Plasma Physics, Chinese Academy of Sciences ; Collaborative Innovation Program of Hefei Science Center Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/129307]
专题	中国科学院合肥物质科学研究院
通讯作者	Xu, Guoliang; Ding, Rui
作者单位	1.Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Grad Sch, Sci Isl Branch, Hefei 230026, Peoples R China 4.Dalian Univ Technol, Sch Phys, Chinese Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hui,Xu, Guoliang,Ding, Rui,et al. Modelling of tungsten impurity edge transport and screening for different divertor conditions in EAST[J]. NUCLEAR FUSION,2022,62.
APA	Wang, Hui.,Xu, Guoliang.,Ding, Rui.,Liu, Xiaoju.,Si, Hang.,...&Chen, Junling.(2022).Modelling of tungsten impurity edge transport and screening for different divertor conditions in EAST.NUCLEAR FUSION,62.
MLA	Wang, Hui,et al."Modelling of tungsten impurity edge transport and screening for different divertor conditions in EAST".NUCLEAR FUSION 62(2022).