Effects of radial transport on divertor power and particle flux widths under different operational regimes in EAST

doi:10.1088/1741-4326/ac1546

	Effects of radial transport on divertor power and particle flux widths under different operational regimes in EAST
	Deng, G. Z.1,5,6; Xu, X. Q.1; Liu, X. J.2; Xu, J. C.2; Meng, L. Y.2; Liu, J. B.2; Li, N. M.4; Schmitz, L.3; Gao, S. L.2; Yang, Q. Q.2
刊名	NUCLEAR FUSION
	2021-10-01
卷号	61
关键词	power flux width particle flux width EAST BOUT plus plus SOLPS
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac1546
通讯作者	Gao, X.(xgao@ipp.ac.cn) ; Wang, L.(lwang@ipp.ac.cn)
英文摘要	A study of the effects of radial transport on the outer divertor particle and power flux widths (lambda ( js ) and lambda ( q )) is carried out using plasmas under different operational regimes in the Experimental Advanced Superconducting Tokamak (EAST). In the EAST experiments, the lambda ( js ) values measured during the grassy intra- and inter-ELM phases are similar, and the averaged value of lambda ( js ) during grassy ELMy discharges is found to be smaller than that of the intra-ELM phase of type-I ELMy discharges but larger than that of the inter-ELM phase of type-I ELMy discharges. Simulations of scans of the radial particle and heat transport coefficients, D and chi (e), performed using the BOUT++ transport code show that both lambda ( q ) and lambda ( js ) increase with D and chi (e), especially when D or chi (e) is larger than a threshold value, indicating that background turbulence starts to matter in the determination of lambda ( q ) and lambda ( js ) when D or chi (e) surpasses the threshold value. A comparison between the simulation of the D scan and the experimental results shows that the different values of lambda ( js ) obtained under different plasma operational regimes are probably due to the different intensities of background turbulence, which is beyond the scope of Goldston's heuristic drift-based model as reported by Goldston et al (2012 Nucl. Fusion 52 013009), since their model was derived by assuming that turbulent transport does not exceed a certain level. The ratio of lambda ( js ) to lambda ( q ) is greatly affected by the radial transport; however, simulations carried out using Scrape-off Layer Plasma Simulation (SOLPS) show that divertor geometry and plasma density have big influences on lambda ( js ), and thus could also affect the ratio of lambda ( js ) to lambda ( q ).
资助项目	National Natural Science Foundation of China[12175277] ; National Natural Science Foundation of China[11975271] ; National Natural Science Foundation of China[12075155] ; National Natural Science Foundation of China[12075283] ; National Natural Science Foundation of China[11922513] ; National Natural Science Foundation of China[11875294] ; National Natural Science Foundation of China[12005257] ; National Key Research and Development Program of China[2017YFE0300500] ; National Key Research and Development Program of China[2017YFE0301300] ; National Key Research and Development Program of China[2017YFA0402500] ; Shenzhen Clean Energy Research Institute ; China scholarship council[201706340070] ; U.S. Department of Energy via the Lawrence Livermore National Laboratory (LLNL)[DE-AC52-07NA27344] ; U.S. Department of Energy via the Lawrence Livermore National Laboratory (LLNL)[LLNL-JRNL-790439] ; AHNFS[1808085J07]
WOS关键词	SCRAPE-OFF LAYER ; L-MODE ; SOL WIDTH ; HEAT ; PLASMAS ; SIMULATIONS
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000694703900001
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Shenzhen Clean Energy Research Institute ; China scholarship council ; U.S. Department of Energy via the Lawrence Livermore National Laboratory (LLNL) ; AHNFS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125287]
专题	中国科学院合肥物质科学研究院
通讯作者	Gao, X.; Wang, L.
作者单位	1.Lawrence Livermore Natl Lab, Livermore, CA 94550 USA 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Univ Calif Los Angeles, Los Angeles, CA 90095 USA 4.Dalian Univ Technol, Sch Phys, Dalian 116024, Peoples R China 5.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China 6.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China
推荐引用方式 GB/T 7714	Deng, G. Z.,Xu, X. Q.,Liu, X. J.,et al. Effects of radial transport on divertor power and particle flux widths under different operational regimes in EAST[J]. NUCLEAR FUSION,2021,61.
APA	Deng, G. Z..,Xu, X. Q..,Liu, X. J..,Xu, J. C..,Meng, L. Y..,...&Wang, L..(2021).Effects of radial transport on divertor power and particle flux widths under different operational regimes in EAST.NUCLEAR FUSION,61.
MLA	Deng, G. Z.,et al."Effects of radial transport on divertor power and particle flux widths under different operational regimes in EAST".NUCLEAR FUSION 61(2021).