SOLPS analysis of changes in the main SOL of DIII-D associated with divertor detachment vs attachment and closure vs openness

doi:10.1088/1741-4326/ab7c29

	SOLPS analysis of changes in the main SOL of DIII-D associated with divertor detachment vs attachment and closure vs openness
	Sang, C. F.4; Guo, H. Y.3; Stangeby, P. C.1; Wang, H. Q.3; Wang, L.2; Wang, D. Z.4
刊名	NUCLEAR FUSION
	2020-05-01
卷号	60
关键词	divertor closure SOL plasma detachment modeling
ISSN号	0029-5515
DOI	10.1088/1741-4326/ab7c29
通讯作者	Sang, C. F.(sang@dlut.edu.cn)
英文摘要	Edge plasma code SOLPS modeling has been used to assess the effects of divertor detachment vs attachment and closure vs openness on the main scrape-off layer (SOL) plasma in DIII-D. The differences between the inner divertor and outer divertor, and the effects of divertor closure on the outer-midplane SOL plasma, have been analysed. It is found that the divertor shape and plasma state have significant influence on the SOL and pedestal plasma. (i) The inner divertor has a more significant effect on the high-field side (HFS) SOL than the outer divertor does on the low-field side (LFS) SOL, and for increasing main plasma density the ionization region in the HFS moves gradually from the divertor target into the HFS SOL, forming a high-density front in the high density discharge case. Also, particle flux reversal occurs near the separatrix. (ii) It is confirmed that divertor closure has a significant effect on the main SOL and pedestal plasma. Comparing an open and a closed divertor, it is found that for the closed divertor the n(e) radial profile at the OMP is higher outside the separatrix and lower inside it, due to the combined effects of the D+ and C impurity ion density. Moreover, the open divertor has higher core fueling than the closed divertor, and the closed divertor has better fuel and impurity neutral screening than the open divertor. (iii) The in/out asymmetry is also influenced by the divertor closure, increase of the closure of the outer divertor can substantially reduce the asymmetry. The closed divertor also has much higher HFS SOL density than that of the LFS SOL. These results highlight the strong dependence of neutral/impurity screening and main SOL properties on divertor geometry and plasma regimes, which needs to be taken into account in advanced divertor design for fusion reactors.
资助项目	National Key R&D Program of China[2017YFA0402500] ; National Key R&D Program of China[2018YFE0301101] ; National Key R&D Program of China[2017YFE0301206] ; National Key R&D Program of China[2017YFE0300402] ; National Key R&D Program of China[2017YFE0300501] ; National Natural Science Foundation of China[11775044] ; U.S. Department of Energy[DE-FC02-04ER54698] ; agency of the United States Government
WOS关键词	PLASMA PERFORMANCE ; GEOMETRY ; PHYSICS ; ONSET
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000525575200001
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; U.S. Department of Energy ; agency of the United States Government
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103691]
专题	中国科学院合肥物质科学研究院
通讯作者	Sang, C. F.
作者单位	1.Univ Toronto, Inst Aerosp Studies, 4925 Dufferin St, Toronto, ON M3H 5T6, Canada 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Gen Atom, POB 85608, San Diego, CA 92186 USA 4.Dalian Univ Technol, Sch Phys, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China
推荐引用方式 GB/T 7714	Sang, C. F.,Guo, H. Y.,Stangeby, P. C.,et al. SOLPS analysis of changes in the main SOL of DIII-D associated with divertor detachment vs attachment and closure vs openness[J]. NUCLEAR FUSION,2020,60.
APA	Sang, C. F.,Guo, H. Y.,Stangeby, P. C.,Wang, H. Q.,Wang, L.,&Wang, D. Z..(2020).SOLPS analysis of changes in the main SOL of DIII-D associated with divertor detachment vs attachment and closure vs openness.NUCLEAR FUSION,60.
MLA	Sang, C. F.,et al."SOLPS analysis of changes in the main SOL of DIII-D associated with divertor detachment vs attachment and closure vs openness".NUCLEAR FUSION 60(2020).