Core tungsten transport in WEST long pulse L-mode plasmas

doi:10.1088/1741-4326/ab9669

HFCAS OpenIR

	Core tungsten transport in WEST long pulse L-mode plasmas
	Yang, X.1,2 ; Manas, P.3; Bourdelle, C.3; Artaud, J. F.3; Sabot, R.3; Camenen, Y.4; Citrin, J.5; Clairet, F.3; Desgranges, C.3; Devynck, P.3; Dittmar, T.6; Ekedahl, A.3; Fedorczak, N.3; Gil, C.3; Loarer, T.3; Lotte, Ph 3; Meyer, O.3; Morales, J.3; Peret, M.3; Peysson, Y.3; Stephens, C. D.7; Urbanczyk, G.8; Vezinet, D.3; Zhang, L.1 ; Gong, X.1
	2020-08-01
发表期刊	NUCLEAR FUSION
ISSN	0029-5515
通讯作者	Manas, P.(pierre.manas@ipp.mpg.de)
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.
关键词	turbulent transport neoclassical transport tungsten tokamak
DOI	10.1088/1741-4326/ab9669
关键词[WOS]	TORE-SUPRA ; TURBULENCE ; STABILITY
收录类别	SCI
语种	英语
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]
项目资助者	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
WOS研究方向	Physics
WOS类目	Physics, Fluids & Plasmas
WOS记录号	WOS:000553148300001
出版者	IOP PUBLISHING LTD
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	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.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.CEA, IRFM, F-13108 Saint Paul Lez Durance, France 4.Aix Marseille Univ, PIIM UMR7345, CNRS, Marseille, France 5.DIFFER Dutch Inst Fundamental Energy Res, Eindhoven, Netherlands 6.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany 7.Univ Calif Los Angeles, Los Angeles, CA 90095 USA 8.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China
第一作者单位	中科院等离子体物理研究所
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).