Defect evolution in tungsten exposed to helium plasma and deuterium plasmas studied by slow positron beam

doi:10.1016/j.nme.2021.101094

	Defect evolution in tungsten exposed to helium plasma and deuterium plasmas studied by slow positron beam
	Lyu, Yi-Ming 1; Xu, Yu-Ping 4; Li, Xiao-Chun 4; Shen, Xin 3,4; Wu, Bo-Yu 2,3; Yip, Chi-Shung 4; Gao, Xiang 4,6; Lin, Xiao-Dong 6; Yang, Zhong-Shi 4; Cao, Xing-Zhong 5
刊名	NUCLEAR MATERIALS AND ENERGY
	2021-12-01
卷号	29
关键词	Tungsten Helium Deuterium Defects EAST
DOI	10.1016/j.nme.2021.101094
通讯作者	Xu, Yu-Ping(xuyp@ipp.ac.cn) ; Zhou, Hai-Shan(haishanzhou@ipp.ac.cn)
英文摘要	Comparison of defect formation in tungsten samples exposed only to a helium plasma and those exposed to both helium plasma and subsequent deuterium plasmas is performed via Doppler broadening spectroscopy in the positron annihilation technique (DBS-PA). The S parameters of tungsten samples after helium plasma exposure increased with the increase of the incident fluence, which indicates that low energy helium plasma could induce the formation of defects such as nano-sized helium bubbles and dislocations in tungsten. The S parameters of samples exposed to helium incident fluence of 7.9 x 10(21) He/m(2) enhanced after deuterium plasmas exposure, indicating that low energy deuterium plasmas could form defects in tungsten too. Unexpectedly, deuterium plasmas exposure did not significantly influence the S parameters of the tungsten sample with helium incident fluence of 3.9 x 10(22) He/m(2), and reduced the S parameters of the tungsten sample with helium incident fluence of 7.9 x 10(22) He/m(2). These variations of S parameters could be associated with the occupation of nano-sized helium bubbles by deuterium atoms. This indicates possible competition between the increased density of vacancy-type defects by deuterium plasmas exposure and the filling of nano-sized helium bubbles by deuterium atoms, reducing detectability of these defects.
资助项目	National Natural Science Foundation of China[11975260] ; National Natural Science Foundation of China[11905246] ; National Natural Science Foundation of China[11875288] ; National Key Research & Development Program of China[2017YFE0301502] ; National Key Research & Development Program of China[2018YFE0303103] ; Shenzhen Clean Energy Research Institute
WOS关键词	LOW-ENERGY ; RETENTION ; BEHAVIOR ; IRRADIATION ; STEEL
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000721358100002
资助机构	National Natural Science Foundation of China ; National Key Research & Development Program of China ; Shenzhen Clean Energy Research Institute
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126658]
专题	中国科学院合肥物质科学研究院
通讯作者	Xu, Yu-Ping; Zhou, Hai-Shan
作者单位	1.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China 2.Anhui Univ, Inst Mat Sci & Informat Technol, Hefei 230039, Peoples R China 3.Univ Sci & Technol China, Sci Isl Branch Grad, Hefei 230031, Peoples R China 4.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 5.Chinese Acad Sci, Multidiscipline Res Ctr, Inst High Energy Phys, Beijing 100049, Peoples R China 6.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China
推荐引用方式 GB/T 7714	Lyu, Yi-Ming,Xu, Yu-Ping,Li, Xiao-Chun,et al. Defect evolution in tungsten exposed to helium plasma and deuterium plasmas studied by slow positron beam[J]. NUCLEAR MATERIALS AND ENERGY,2021,29.
APA	Lyu, Yi-Ming.,Xu, Yu-Ping.,Li, Xiao-Chun.,Shen, Xin.,Wu, Bo-Yu.,...&Luo, Guang-Nan.(2021).Defect evolution in tungsten exposed to helium plasma and deuterium plasmas studied by slow positron beam.NUCLEAR MATERIALS AND ENERGY,29.
MLA	Lyu, Yi-Ming,et al."Defect evolution in tungsten exposed to helium plasma and deuterium plasmas studied by slow positron beam".NUCLEAR MATERIALS AND ENERGY 29(2021).