RF wave coupling, plasma heating and characterization of induced plasma-material interactions in WEST L-mode discharges

doi:10.1088/1741-4326/ac0d11

	RF wave coupling, plasma heating and characterization of induced plasma-material interactions in WEST L-mode discharges
	Urbanczyk, G.2; Colas, L.3; Hillairet, J.3; Lerche, E.4; Fedorczak, N.3; Morales, J.3; Gunn, J.3; Ostuni, V.3; Heuraux, S.5; Vezinet, D.3
刊名	NUCLEAR FUSION
	2021-08-01
卷号	61
关键词	ICRH WEST plasma surface interaction SOL impurity sources tungsten
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac0d11
通讯作者	Urbanczyk, G.(guiguiurban@hotmail.com)
英文摘要	Plasma heating in the full tungsten (W) environment in a steady-state tokamak (WEST) relies on electromagnetic waves in both the lower hybrid (LH) and ion cyclotron range of frequencies (ICRF). The present study focuses mostly on the optimization of discharges heated with ICRF, by reporting different methods to first optimize wave coupling, optimize their absorption and reduce the impurity production. It is shown that ICRF coupling can be optimized by moving the plasma closer to antennas, increasing the plasma density, wave frequency and LH power. We show that the absorption efficiency correlates with the hydrogen concentration with the existence of an optimum between 7% and 10% as expected for a minority heating scenario. Absolutely calibrated visible spectroscopy sightlines were used to monitor ion fluxes in different locations as part of an effort to quantitatively estimate the contribution of different impurity sources to the core contamination by tungsten. It is typically found that in discharges with high total RF-power (above 5 MW of LH and 3 MW of ICRF), divertor and antenna limiter sources can reach a similar order of magnitude during the ICRF phase.
资助项目	Euratom research and training programme[633053]
WOS关键词	SCRAPE-OFF LAYER ; ICRF ; TOKAMAK ; DESIGN ; WALL
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000674463500001
资助机构	Euratom research and training programme
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123251]
专题	中国科学院合肥物质科学研究院
通讯作者	Urbanczyk, G.
作者单位	1.Oak Ridge Natl Lab, Oak Ridge, TN USA 2.Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China 3.CEA, IRFM, F-13108 St Paul Les Durance, France 4.Assoc EURATOM Belgian State, Lab Plasmafys, Trilateral Euregio Cluster, Lab Phys Plasmas, 30 Ave Renaissance, B-1000 Brussels, Belgium 5.Univ Lorraine CNRS, Inst Jean Lamour, F-54000 Nancy, France 6.Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany 7.ITER Org, Route Vinon Sur Verdon,CS 90 046, F-13067 St Paul, Lez Durance, France 8.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Urbanczyk, G.,Colas, L.,Hillairet, J.,et al. RF wave coupling, plasma heating and characterization of induced plasma-material interactions in WEST L-mode discharges[J]. NUCLEAR FUSION,2021,61.
APA	Urbanczyk, G..,Colas, L..,Hillairet, J..,Lerche, E..,Fedorczak, N..,...&Wang, K..(2021).RF wave coupling, plasma heating and characterization of induced plasma-material interactions in WEST L-mode discharges.NUCLEAR FUSION,61.
MLA	Urbanczyk, G.,et al."RF wave coupling, plasma heating and characterization of induced plasma-material interactions in WEST L-mode discharges".NUCLEAR FUSION 61(2021).