Result and discussion on the evolution of in-situ leading edge-induced melting on W divertor targets in EAST

doi:10.1016/j.nme.2021.100997

	Result and discussion on the evolution of in-situ leading edge-induced melting on W divertor targets in EAST
	Lei, Yang 2,3; Zhu, Dahuan 2; Li, Changjun 2; GeSangZhouMa 3; Gao, Binfu 1,2; Wang, Baoguo 2; Ding, Rui 2; Chen, Junling 2; Yu, Baixue 3; Xuan, Chuannan 1,2
刊名	NUCLEAR MATERIALS AND ENERGY
	2021-06-01
卷号	27
关键词	EAST W/Cu monoblocks W melting Melt-layer motion Thermal analysis
DOI	10.1016/j.nme.2021.100997
通讯作者	Zhu, Dahuan(dhzhu@ipp.ac.cn) ; Li, Changjun(cjli@ipp.ac.cn)
英文摘要	The application of ITER-like W/Cu plasma facing components in current tokamaks is of special concern by ITER. In 2014, ASIPP successfully upgraded upper divertor of EAST to a full tungsten component structure through independent research and development, and adopted W/Cu monoblocks as the divertor targets for high power exhaust. During recent plasma operations, the leading edge-induced thermal loading caused the melting of W/Cu monoblocks and the melt layer occur motion mainly by electromagnetic force. It was found that the melt layer migrated to neighboring W/Cu monoblocks, solidified into a hill structure or filled the gap between W/Cu monoblocks. Meanwhile, the large sized chamfering structure was residual on the molten W/Cu monoblocks. The thermal analysis shows that the W/Cu monoblcoks with large sized chamfering structure has an increased heat load capacity and it is not prone to secondary melting with the same heat flux in subsequent operations. And the removed molten layer may gradually migrate far away from the strike point and eventually solidify into stable structures. The improvement of the heat load capacity of the molten W/Cu monoblock and the melt-layer motion may be a benign situation, thereby achieving a healing effect to avoid further deterioration of plasma facing components. The evolution behavior of such leading edge-induced melting on ITER-like W/Cu monoblocks in EAST provides significant reference for ITER.
资助项目	National Key R&D Program of China[2017YFA0402500] ; National Key R&D Program of China[2017YFE0301300] ; National Natural Science Foundation of China[11775260] ; National Natural Science Foundation of China[11675219] ; National Natural Science Foundation of China[11675218] ; National Natural Science Foundation of China[11861131010] ; Key Research Program of Frontier Sciences, CAS[ZDBS-LY-SLH010] ; CASHIPS Director's Fund[BJPY2019B01] ; Collaborative Innovation Program of Hefei Science Center, CAS[2020HSC-CIP006] ; College Students' Innovative Training Plan Program Hefei Institute of Physical Science Chinese Academy of Sciences[CASHIPS027] ; College Students' Innovative Training Plan Program of Chinese Academy of Sciences[20204001929] ; College Students' Innovative Entrepreneurial Training Plan Program of Tibet University[2020XCX010]
WOS关键词	PLASMA ; ITER
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000670923000003
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; CASHIPS Director's Fund ; Collaborative Innovation Program of Hefei Science Center, CAS ; College Students' Innovative Training Plan Program Hefei Institute of Physical Science Chinese Academy of Sciences ; College Students' Innovative Training Plan Program of Chinese Academy of Sciences ; College Students' Innovative Entrepreneurial Training Plan Program of Tibet University
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123511]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhu, Dahuan; Li, Changjun
作者单位	1.Univ Sci & Technol China, Grad Sch, Sci Isl Branch, Hefei 230021, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Tibet Univ, Sch Sci, Lhasa 850000, Peoples R China
推荐引用方式 GB/T 7714	Lei, Yang,Zhu, Dahuan,Li, Changjun,et al. Result and discussion on the evolution of in-situ leading edge-induced melting on W divertor targets in EAST[J]. NUCLEAR MATERIALS AND ENERGY,2021,27.
APA	Lei, Yang.,Zhu, Dahuan.,Li, Changjun.,GeSangZhouMa.,Gao, Binfu.,...&Xuan, Chuannan.(2021).Result and discussion on the evolution of in-situ leading edge-induced melting on W divertor targets in EAST.NUCLEAR MATERIALS AND ENERGY,27.
MLA	Lei, Yang,et al."Result and discussion on the evolution of in-situ leading edge-induced melting on W divertor targets in EAST".NUCLEAR MATERIALS AND ENERGY 27(2021).