Effect of divertor plasma-facing materials and drift on the power decay width in the scrape-off layer and divertor on EAST

doi:10.1088/1741-4326/ac65a1

	Effect of divertor plasma-facing materials and drift on the power decay width in the scrape-off layer and divertor on EAST
	Zhang, Chen 1; Sang, Chaofeng 1; Wang, Liang 2; Zhang, Yanjie 1; Li, Nami 1; Wang, Dezhen 1
刊名	NUCLEAR FUSION
	2022-07-01
卷号	62
关键词	power decay width Gauss width divertor SOLPS-ITER
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac65a1
通讯作者	Sang, Chaofeng(sang@dlut.edu.cn)
英文摘要	The narrow power decay width lambda(q) may lead to high heat flux density to the divertor target, which is one of the most severe challenges for future fusion devices. EAST has upgraded its lower graphite (C) divertor to a tungsten (W) one, and it is important to reveal the dependence of lambda(q) on the divertor condition. In the present work, SOLPS-ITER is applied to estimate the effect of various conditions [C/W plasma facing material (PFM), with/without drift] on lambda(q) of EAST in attached divertor regime. The simulation results confirm that the power decay width of the upstream lambda(q,SOL), divertor lambda(q,)(OT), and private-flux region (PFR) S-OT all depend on the PFMs and drifts. However, the effect of PFM on lambda(q,SOL), is slight, while it has a significant influence on lambda(q,)(OT) and S-OT. In the upstream, positive correlation between lambda(q,SOL), and v(SOL)* is obtained, and the simulation is in qualitative agreement with the two-point model. Both lambda(q,SOL) and lambda(q,OT) in without drift case are larger than that of with drift case. The regression of simulation results is obtained, showing a strong positive correlation between SOL collisionality v(SOL)* power radiation friction in divertor region f(rad,)(OD) and lambda(q,)(OT). Thus, the C PFM with intrinsic impurity has the largest lambda(q,)(OT). In the PFR, S-OT with drift is smaller than that of without drift. Moreover, the combination of more D atoms accumulation and stronger E-p x B drift lead to larger S-OT in W PFM case than that of C PFM case.
资助项目	National Key R&D Program of China[2017YFE0301206] ; National Key R&D Program of China[2017YFA0402500] ; National Key R&D Program of China[2017YFE0300402] ; National Key R&D Program of China[2018YFE0301101] ; National Natural Science Foundation of China[12122503] ; National Natural Science Foundation of China[12011530053] ; Fundamental Research Funds for the Central Universities[DUT21GJ204]
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000787083800001
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131482]
专题	中国科学院合肥物质科学研究院
通讯作者	Sang, Chaofeng
作者单位	1.Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Electron Beams, Minist Educ, Sch Phys, Dalian 116024, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Chen,Sang, Chaofeng,Wang, Liang,et al. Effect of divertor plasma-facing materials and drift on the power decay width in the scrape-off layer and divertor on EAST[J]. NUCLEAR FUSION,2022,62.
APA	Zhang, Chen,Sang, Chaofeng,Wang, Liang,Zhang, Yanjie,Li, Nami,&Wang, Dezhen.(2022).Effect of divertor plasma-facing materials and drift on the power decay width in the scrape-off layer and divertor on EAST.NUCLEAR FUSION,62.
MLA	Zhang, Chen,et al."Effect of divertor plasma-facing materials and drift on the power decay width in the scrape-off layer and divertor on EAST".NUCLEAR FUSION 62(2022).