Study of the tungsten sputtering source suppression by wall conditionings in the EAST tokamak

doi:10.1088/2058-6272/abec63

	Study of the tungsten sputtering source suppression by wall conditionings in the EAST tokamak
	WANG,Junru 1,2; YU,Yaowei 1; WANG,Houyin 1; CAO,Bin 1; HU,Jiansheng 1,3; XU,Wei 1
刊名	Plasma Science and Technology
	2021-04-13
卷号	23
关键词	tungsten sputtering source carbon impurity wall conditioning PWI EAST
ISSN号	1009-0630
DOI	10.1088/2058-6272/abec63
通讯作者	YU,Yaowei()
英文摘要	Abstract The steady fusion plasma operation is constrained by tungsten (W) material sputtering issue in the EAST tokamak. In this work, the suppression of W sputtering source has been studied by advanced wall conditionings. It is also concluded that the W sputtering yield becomes more with increasing carbon (C) content in the main deuterium (D) plasma. In EAST, the integrated use of discharge cleanings and lithium (Li) coating has positive effects on the suppression of W sputtering source. In the plasma recovery experiments, it is suggested that the W intensity is reduced by approximately 60% with the help of ～35 h Ion Cyclotron Radio Frequency Discharge Cleaning (ICRF-DC) and ～40 g Li coating after vacuum failure. The first wall covered by Li film could be relieved from the bombardment of energetic particles, and the impurity in the vessel would be removed through the particle induced desorption and isotope exchange during the discharge cleanings. In general, the sputtering yield of W would decrease from the source, on the bias of the improvement of wall condition and the mitigation of plasma-wall interaction process. It lays important base of the achievement of high-parameter and long-pulse plasma operation in EAST. The experiences also would be constructive for us to promote the understanding of relevant physics and basis towards the ITER-like condition.
资助项目	National Key Research and Development Program of China[2017YFE0301100] ; National Key Research and Development Program of China[2017YFA0402500] ; National Natural Science Foundation of China[11605237] ; Users with Excellence Program of Hefei Science Center CAS[2020HSC-UE010]
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:1009-0630-23-5-ABEC63
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation 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/334002/121866]
专题	中国科学院合肥物质科学研究院
通讯作者	YU,Yaowei
作者单位	1.Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China 2.University of Science and Technology of China, Hefei 230026, People’s Republic of China 3.Key Laboratory of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
推荐引用方式 GB/T 7714	WANG,Junru,YU,Yaowei,WANG,Houyin,et al. Study of the tungsten sputtering source suppression by wall conditionings in the EAST tokamak[J]. Plasma Science and Technology,2021,23.
APA	WANG,Junru,YU,Yaowei,WANG,Houyin,CAO,Bin,HU,Jiansheng,&XU,Wei.(2021).Study of the tungsten sputtering source suppression by wall conditionings in the EAST tokamak.Plasma Science and Technology,23.
MLA	WANG,Junru,et al."Study of the tungsten sputtering source suppression by wall conditionings in the EAST tokamak".Plasma Science and Technology 23(2021).