Impurity Emission Behavior in the Soft X-Ray and Extreme Ultraviolet Range on EAST

Spectroscopy in the soft X-ray and extreme ultraviolet （XEUV） region is very im- portant in magnetic fusion research. Recently, two fiat-field spectrometers that utilize a varied line spacing grating to image the spectra of 1-13 nm and 5-50 nm were installed on EAST for core impurity emission monito...

Full description

Saved in:
Bibliographic Details
Published inPlasma science & technology Vol. 17; no. 3; pp. 183 - 187
Main Author 沈永才 吕波 杜学维 李颖颖 符佳 王福地 潘夏云 陈俊 王秋平 石跃江
Format Journal Article
LanguageEnglish
Published 01.03.2015
Subjects
Chromium
Devices
EAST
Emission spectroscopy
Impurities
Molybdenum
Soft x-rays
Spectral lines
Ultraviolet
光栅图像
光谱仪
排放监测
杂质输运
紫外波段
行为
软X射线
Online AccessGet full text

Cover

More Information
Summary:Spectroscopy in the soft X-ray and extreme ultraviolet （XEUV） region is very im- portant in magnetic fusion research. Recently, two fiat-field spectrometers that utilize a varied line spacing grating to image the spectra of 1-13 nm and 5-50 nm were installed on EAST for core impurity emission monitoring and impurity transport study. The instruments were proven to be capable of observing spectral lines from low-Z impurities （Li, C, O, N, Ar, etc.） and highly ionized medium- and high-Z impurities （Fe, Cr, Ni, Cu, Mo, etc.）. For example, spectra in the wavelength intervals of 1-2 nm and 5-13 nm contained strong metal lines~ especially molybdenum lines during H-mode phases. Argon and nitrogen lines were also observed, which were injected for diagnostic purposes. Impurity lines were identified and compared to measurements on other magnetic fusion research devices. Detailed measurements of radial emission profiles from various impurity line emissions were also presented.
Bibliography:EAST, XEUV, impurity emission measurements
Spectroscopy in the soft X-ray and extreme ultraviolet （XEUV） region is very im- portant in magnetic fusion research. Recently, two fiat-field spectrometers that utilize a varied line spacing grating to image the spectra of 1-13 nm and 5-50 nm were installed on EAST for core impurity emission monitoring and impurity transport study. The instruments were proven to be capable of observing spectral lines from low-Z impurities （Li, C, O, N, Ar, etc.） and highly ionized medium- and high-Z impurities （Fe, Cr, Ni, Cu, Mo, etc.）. For example, spectra in the wavelength intervals of 1-2 nm and 5-13 nm contained strong metal lines~ especially molybdenum lines during H-mode phases. Argon and nitrogen lines were also observed, which were injected for diagnostic purposes. Impurity lines were identified and compared to measurements on other magnetic fusion research devices. Detailed measurements of radial emission profiles from various impurity line emissions were also presented.
SHEN Yongcai , LYU Bo , DU Xuewei, LI Yingying, FU Jia , WANG Fudi, PAN Xiayun, CHEN Jun, WANG Qiuping, SHI Yuejiang （1.Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; 2.School of Physics and Electrical Engineering of Anqing Normal College, Anqing 246011 China;3.University of Science and Technology of China, Hefei 230039, China; 4.WCI Center for Fusion Theory, National Fusion Research Institute, 52 Eoeun-Dong, Yusung-Gu, Daejeon 305-333, Korea）
34-1187/TL
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1009-0630
DOI:10.1088/1009-0630/17/3/02