Control of tungsten impurity source and edge transport using different gas injection with full tungsten divertor on EAST

doi:10.1016/j.nme.2022.101250

	Control of tungsten impurity source and edge transport using different gas injection with full tungsten divertor on EAST
	Ding, R.1; Xu, G. L.1; Wang, H.1; Ding, F.1; Zhang, L.1; Zhang, Q.1; Li, K. D.1; Liu, J. B.1; Brezinsek, S.2; Kirschner, A.2
刊名	NUCLEAR MATERIALS AND ENERGY
	2022-10-01
卷号	33
DOI	10.1016/j.nme.2022.101250
通讯作者	Ding, R.(rding@ipp.ac.cn) ; Xu, G. L.(guoliang.xu@ipp.ac.cn)
英文摘要	Tungsten (W) erosion and edge transport are investigated for EAST L-mode discharges with different gas injection. It is found that W erosion can be suppressed or mitigated by Ne or D-2 seeding when divertor detachment is achieved. Compared to edge D-2 fueling, Ne seeding from the divertor target is favorable for full detachment condition and thus W erosion suppression. Increasing the upstream plasma density by edge D-2 fueling can affect the divertor condition, which may lead to a W erosion mitigation. D-2 puffing at divertor target is less effective on increasing the upstream plasma density than OMP D-2 puffing, and thus it is less effective on reduction of W erosion rates. W gross erosion profiles with different amount of injected D-2 at the divertor are reproduced by a mixed material W erosion model, which indicates that there exist a Li-C overlayer on the W surface of EAST divertor. Ne and D-2 injection are also found to have different impact on the normalized core W density. For the attached divertor condition, divertor Ne seeding will increase W leakage, but a suitable D-2 fueling from divertor target can strengthen the edge W screening. After the divertor detachment, although the W source is dramatically reduced, the W core density is kept in a high level for the Ne seeding discharges, and even increased for the D-2 fueling discharges.
资助项目	National Natural Science Foundation of China[12022511] ; National Natural Science Foundation of China[12005143] ; National Key Research and Development Program of China ; National MCF Energy R&D Program of China[2022YFE03180100] ; National MCF Energy R&D Program of China[2019YFE03080100] ; Key Research Program of Frontier Sciences, CAS[ZDBS-LY-SLH010] ; Science Foundation of Institute of Plasma Physics, Chinese Academy of Sciences[DSJJ-2021-02]
WOS关键词	LITHIUM ; EROSION
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000862873900008
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China ; National MCF Energy R&D Program of China ; Key Research Program of Frontier Sciences, CAS ; Science Foundation of Institute of Plasma Physics, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/129277]
专题	中国科学院合肥物质科学研究院
通讯作者	Ding, R.; Xu, G. L.
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei, Peoples R China 2.Forschungszentrum Julich, Inst Energie & Klimaforsch, Julich, Germany
推荐引用方式 GB/T 7714	Ding, R.,Xu, G. L.,Wang, H.,et al. Control of tungsten impurity source and edge transport using different gas injection with full tungsten divertor on EAST[J]. NUCLEAR MATERIALS AND ENERGY,2022,33.
APA	Ding, R..,Xu, G. L..,Wang, H..,Ding, F..,Zhang, L..,...&Chen, J. L..(2022).Control of tungsten impurity source and edge transport using different gas injection with full tungsten divertor on EAST.NUCLEAR MATERIALS AND ENERGY,33.
MLA	Ding, R.,et al."Control of tungsten impurity source and edge transport using different gas injection with full tungsten divertor on EAST".NUCLEAR MATERIALS AND ENERGY 33(2022).