Development of vacuum ultraviolet spectroscopy for measuring edge impurity emission in the EAST tokamak

doi:10.1088/2058-6272/ab81a4

	Development of vacuum ultraviolet spectroscopy for measuring edge impurity emission in the EAST tokamak
	Zhang Hongming 3; Lyu Bo 3; He Liang 2,3; Shen Yongcai 1; Chen Jun 5; Fu Jia 3; Bin Bin 1,3; Wang Xunyu 3; Wang Fudi 3; Li Yingying 3
刊名	PLASMA SCIENCE & TECHNOLOGY
	2020-08-01
卷号	22
关键词	EAST tokamak impurity tungsten vacuum ultraviolet spectroscopy edge impurity emission plasma diagnostics
ISSN号	1009-0630
DOI	10.1088/2058-6272/ab81a4
通讯作者	Lyu Bo(blu@ipp.ac.cn)
英文摘要	The dominant wavelength range of edge impurity emissions moves from the visible range to the vacuum ultraviolet (VUV) range, as heating power increasing in the Experimental Advanced Superconducting Tokamak (EAST). The measurement provided by the existing visible spectroscopies in EAST is not sufficient for impurity transport studies for high-parameters plasmas. Therefore, in this study, a VUV spectroscopy is newly developed to measure edge impurity emissions in EAST. One Seya-Namioka VUV spectrometer (McPherson 234/302) is used in the system, equipped with a concave-corrected holographic grating with groove density of 600 grooves mm(-1). Impurity line emissions can be observed in the wavelength range of lambda = 50-700 nm, covering VUV, near ultraviolet and visible ranges. The observed vertical range is Z = -350-350 mm. The minimum sampling time can be set to 5 ms under full vertical binning (FVB) mode. VUV spectroscopy has been used to measure the edge impurity emission for the 2019 EAST experimental campaign. Impurity spectra are identified for several impurity species, i.e., lithium (Li), carbon (C), oxygen (O), and iron (Fe). Several candidates for tungsten (W) lines are also measured but their clear identification is very difficult due to a strong overlap with Fe lines. Time evolutions of impurity carbon emissions of CII at 134.5 nm and CIII at 97.7 nm are analyzed to prove the system capability of time-resolved measurement. The measurements of the VUV spectroscopy are very helpful for edge impurity transport study in the high-parameters plasma in EAST.
资助项目	National Magnetic Confinement Fusion Science Program of China[2017YFE0301300] ; National Magnetic Confinement Fusion Science Program of China[2018YFE0301100] ; National Natural Science Foundation of China[11805231] ; National Natural Science Foundation of China[11705151] ; ASIPP Science and Research Grant[DSJJ-17-03] ; Key Program of Research and Development of Hefei Science Center[2017HSC-KPRD002] ; Anhui Provincial Natural Science Foundation[1808085QA14] ; Anhui Provincial Natural Science Foundation[1908085J01] ; Instrument Developing Project of the Chinese Academy of Sciences[YJKYYQ20180013] ; Collaborative Innovation Program of Hefei Science Center, CAS[2019HSC-CIP005]
WOS关键词	SPECTROMETER
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000531249300001
资助机构	National Magnetic Confinement Fusion Science Program of China ; National Natural Science Foundation of China ; ASIPP Science and Research Grant ; Key Program of Research and Development of Hefei Science Center ; Anhui Provincial Natural Science Foundation ; Instrument Developing Project of the Chinese Academy of Sciences ; Collaborative Innovation Program of Hefei Science Center, CAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103305]
专题	中国科学院合肥物质科学研究院
通讯作者	Lyu Bo
作者单位	1.Anqing Normal Univ, Sch Phys & Elect Engn, Anqing 246011, Peoples R China 2.Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China 3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 4.Southwestern Jiaotong Univ, Inst Fus Sci, Sch Phys Sci & Technol, Chengdu 610031, Peoples R China 5.Univ Sci & Technol China, Dept Engn & Appl Phys, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Zhang Hongming,Lyu Bo,He Liang,et al. Development of vacuum ultraviolet spectroscopy for measuring edge impurity emission in the EAST tokamak[J]. PLASMA SCIENCE & TECHNOLOGY,2020,22.
APA	Zhang Hongming.,Lyu Bo.,He Liang.,Shen Yongcai.,Chen Jun.,...&Liu Bing.(2020).Development of vacuum ultraviolet spectroscopy for measuring edge impurity emission in the EAST tokamak.PLASMA SCIENCE & TECHNOLOGY,22.
MLA	Zhang Hongming,et al."Development of vacuum ultraviolet spectroscopy for measuring edge impurity emission in the EAST tokamak".PLASMA SCIENCE & TECHNOLOGY 22(2020).