Core tungsten transport in WEST long pulse L-mode plasmas

doi:10.1088/1741-4326/ab9669

	Core tungsten transport in WEST long pulse L-mode plasmas
	Yang, X.7,8; Manas, P.6; Bourdelle, C.6; Artaud, J. F.6; Sabot, R.6; Camenen, Y.5; Citrin, J.4; Clairet, F.6; Desgranges, C.6; Devynck, P.6
刊名	NUCLEAR FUSION
	2020-08-01
卷号	60
关键词	turbulent transport neoclassical transport tungsten tokamak
ISSN号	0029-5515
DOI	10.1088/1741-4326/ab9669
通讯作者	Manas, P.(pierre.manas@ipp.mpg.de)
英文摘要	Tungsten transport is investigated in WEST long pulse L-mode plasmas operated with the strike point on the actively cooled upper tungsten divertor. The pulses are mostly heated by lower hybrid waves. It is experimentally found that tungsten does not centrally accumulate throughout these similar to 30 s reproducible discharges despite large normalised electron density gradients R/L-ne. To explain these observations, turbulent and neoclassical transport of electrons and tungsten ions are computed with GKW Peeters A.G. et al (2009 Computer Phys. Commnun. 180 2650) and NEO Belli E. and Candy J. (2008 Plasma Phys. Control. Fusion 50 095010), Belli E. and Candy J. (2012 Plasma Phys. Control. Fusion 54 015015) respectively. Additionally, interpretative integrated modelling simulations are also performed to keep data coherency despite the lack of measurements of some quantities such as the Ti profiles. Modelled R/Lne are found consistent with interferometry inversions and the tungsten peaking factor R/L-nW remains comparable to R/L-ne due to dominant turbulent diffusivities inside r/a = 0.3-0.8. In the central region r/a < 0.3 neoclassical W transport dominates but the convective velocities are several order of magnitudes lower compared to plasmas with toroidal rotation velocities induced by a neutral beam injection (NBI) torque. Finally, nitrogen is seeded in these pulses leading to an enhanced energy content which is consistent with stabilised ion temperature gradient modes from dilution.
资助项目	program of China Scholarships Council ; National Natural Science Foundation of China[11775269] ; National Natural Science Foundation of China[11905146] ; National Key Research and Development Program of China[2018YFE0311100] ; Users with Excellence Program of Hefei Science Center CAS[2019HSC-UE014]
WOS关键词	TORE-SUPRA ; TURBULENCE ; STABILITY
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000553148300001
资助机构	program of China Scholarships Council ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; Users with Excellence Program of Hefei Science Center CAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/70897]
专题	中国科学院合肥物质科学研究院
通讯作者	Manas, P.
作者单位	1.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China 2.Univ Calif Los Angeles, Los Angeles, CA 90095 USA 3.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany 4.DIFFER Dutch Inst Fundamental Energy Res, Eindhoven, Netherlands 5.Aix Marseille Univ, PIIM UMR7345, CNRS, Marseille, France 6.CEA, IRFM, F-13108 Saint Paul Lez Durance, France 7.Univ Sci & Technol China, Hefei 230026, Peoples R China 8.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Yang, X.,Manas, P.,Bourdelle, C.,et al. Core tungsten transport in WEST long pulse L-mode plasmas[J]. NUCLEAR FUSION,2020,60.
APA	Yang, X..,Manas, P..,Bourdelle, C..,Artaud, J. F..,Sabot, R..,...&Gong, X..(2020).Core tungsten transport in WEST long pulse L-mode plasmas.NUCLEAR FUSION,60.
MLA	Yang, X.,et al."Core tungsten transport in WEST long pulse L-mode plasmas".NUCLEAR FUSION 60(2020).