Study of microscale surface morphology changing of the retroreflector in EAST by means of laser speckle interferometry technique

doi:10.1016/j.nme.2021.101087

	Study of microscale surface morphology changing of the retroreflector in EAST by means of laser speckle interferometry technique
	Wang, Hongbei 1,2,3; Yan, Huihui 2,4; Cui, Xiaoqian 3; Zhang, Nu 2,4; Jie, Yinxian 2; Liu, Haiqing 2; Ding, Hongbin 3
刊名	NUCLEAR MATERIALS AND ENERGY
	2021-12-01
卷号	29
关键词	Plasma wall interaction Surface morphology changing Speckle interferometry Retroreflector
DOI	10.1016/j.nme.2021.101087
通讯作者	Wang, Hongbei(hongbei.wang@ipp.ac.cn)
英文摘要	The retroreflectors in EAST (Experimental Advanced Superconducting Tokamak) are important optical components of Polarimeter-Interferometer (POINT) system, working as the first mirrors to reflect the incident far infrared laser. The surface morphology changing of the retroreflector has a direct impact on the optical reflection accuracy and it will generate a significant influence on EAST plasma density measurement and plasma current distribution diagnosis. Therefore, it is essential to research the surface morphology changing of the retroreflector systematically. Laser speckle interferometry technique is considered as a most promising method for real-time monitoring the PFMs surface morphology changing at plasma discharge intervals in the near future and its measurement accuracy and reliability have been adequately verified in the laboratory. One retroreflector served in 2019-2020 EAST Campaign is selected as a representative, compared with a brand-new retroreflector, to demonstrate that microscale surface morphology changing occurred on the internal reflection planes after bearing a whole EAST campaign plasma interaction. Meanwhile, the surface morphology of each internal reflection plane appears severely different features. Further research and analysis of the surface morphology are more contributed to evaluating the damage states of the retroreflector and providing more suggestions for the improvement and protection of the retroreflector. The surface morphology reconstruction results are given through a 3D visual exhibition and laser speckle interferometry technique is proposing a new research perspective for PWI research.
资助项目	National Key R&D Program of China[2017YFE0301304] ; National Key R&D Program of China[2019YFE03040003] ; National Key R&D Program of China[2017YFE0301205] ; National Nature Science Foundation of China[11905141] ; China Postdoctoral Science Foundation[2019M650207] ; Hefei Science Center, CAS[2019HSC-KPRD001] ; Shenzhen Clean Energy Research Institute
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000720213200002
资助机构	National Key R&D Program of China ; National Nature Science Foundation of China ; China Postdoctoral Science Foundation ; Hefei Science Center, CAS ; Shenzhen Clean Energy Research Institute
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126718]
专题	中国科学院合肥物质科学研究院
通讯作者	Wang, Hongbei
作者单位	1.Shenzhen Univ, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Coll Optoelect Engn, Shenzhen 518060, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Dalian Univ Technol, Dalian 116024, Liaoning, Peoples R China 4.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hongbei,Yan, Huihui,Cui, Xiaoqian,et al. Study of microscale surface morphology changing of the retroreflector in EAST by means of laser speckle interferometry technique[J]. NUCLEAR MATERIALS AND ENERGY,2021,29.
APA	Wang, Hongbei.,Yan, Huihui.,Cui, Xiaoqian.,Zhang, Nu.,Jie, Yinxian.,...&Ding, Hongbin.(2021).Study of microscale surface morphology changing of the retroreflector in EAST by means of laser speckle interferometry technique.NUCLEAR MATERIALS AND ENERGY,29.
MLA	Wang, Hongbei,et al."Study of microscale surface morphology changing of the retroreflector in EAST by means of laser speckle interferometry technique".NUCLEAR MATERIALS AND ENERGY 29(2021).