Understanding core tungsten (W) transport and control in an improved high-performance fully non-inductive discharge on EAST

doi:10.1088/1741-4326/ac3e3c

	Understanding core tungsten (W) transport and control in an improved high-performance fully non-inductive discharge on EAST
	Shi, Shengyu 1,2; Chen, Jiale 2; Bourdelle, Clarisse 3; Jian, Xiang 4,5; Odstrcil, Tomas 5; Garofalo, Andrea M.5; Cheng, Yunxin 2; Chao, Yan 2; Zhang, Ling 2; Duan, Yanmin 2
刊名	NUCLEAR FUSION
	2022-06-01
卷号	62
关键词	EAST fully non-inductive discharge heavy high-Z impurity W transport neoclassical and turbulent transport W control
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac3e3c
通讯作者	Chen, Jiale(chen@ipp.ac.cn) ; Zhang, Ling(zhangling@ipp.ac.cn)
英文摘要	The behavior of heavy/high-Z impurity tungsten (W) in an improved high-performance fully non-inductive discharge on EAST with ITER-like divertor (ILD) is analyzed. It is found that W could be well controlled. The causes of no W accumulation are clarified by analyzing the background plasma parameters and modeling the W transport. It turns out that the electron temperature (T (e)) and its gradient are usually high while the toroidal rotation and density peaking of the bulk plasma are small. In this condition, the modeled W turbulent diffusion coefficient is big enough to offset the total turbulent and neoclassical pinch, so that W density profile for zero particle flux will not be very peaked. Combining NEO and TGLF for the W transport coefficient and the impurity transport code STRAHL, not only the core W density profile is predicted but also the radiated information mainly produced by W in the experiment can be closely reconstructed. At last, the physics of controlling W accumulation by electron cyclotron resonance heating (ECRH) is illustrated considering the effects of changed T (e) by ECRH on ionization balance and transport of W. It shows that the change of ionization and recombination balance by changed T (e) is not enough to explain the experimental observation of W behavior, which should be attributed to the changed W transport. By comparing the W transport coefficients in two kinds of plasmas with different T (e) profiles, it is shown that high T (e) and its gradient play a key role to generate large turbulent diffusion through increasing the growth rate of linear instability so that W accumulation is prevented.
资助项目	National Nature Science Foundation of China[12175277] ; National Nature Science Foundation of China[11975271] ; National Nature Science Foundation of China[11775269] ; National Nature Science Foundation of China[11975273]
WOS关键词	IMPURITY TRANSPORT ; PROFILE
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000783980800001
资助机构	National Nature Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/128581]
专题	中国科学院合肥物质科学研究院
通讯作者	Chen, Jiale; Zhang, Ling
作者单位	1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.CEA, IRFM, F-13108 St Paul Les Durance, France 4.Univ Calif San Diego, Ctr Energy Res, La Jolla, CA 92093 USA 5.Gen Atom, POB 85608, San Diego, CA 92186 USA 6.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China 7.ENN Sci & Technol Dev Co Ltd, Langfang 065001, Peoples R China 8.Hebei Key Lab Compact Fus, Langfang 065001, Peoples R China
推荐引用方式 GB/T 7714	Shi, Shengyu,Chen, Jiale,Bourdelle, Clarisse,et al. Understanding core tungsten (W) transport and control in an improved high-performance fully non-inductive discharge on EAST[J]. NUCLEAR FUSION,2022,62.
APA	Shi, Shengyu.,Chen, Jiale.,Bourdelle, Clarisse.,Jian, Xiang.,Odstrcil, Tomas.,...&Wan, Yuanxi.(2022).Understanding core tungsten (W) transport and control in an improved high-performance fully non-inductive discharge on EAST.NUCLEAR FUSION,62.
MLA	Shi, Shengyu,et al."Understanding core tungsten (W) transport and control in an improved high-performance fully non-inductive discharge on EAST".NUCLEAR FUSION 62(2022).