Space-Resolved VUV and EUV Spectrometers in HL-2A

作者：Cui Zhengying, Hangyu Zhou, S. Morita, Bingzhong Fu, Ping Sun, Yadong Gao, M. Goto, Yuan Xu, Chunfeng Dong, Yang Qingwei · 发表于：Plasma Science and Technology · 年份：2013 · DOI：10.1088/1009-0630/15/2/06 · 被引用次数：11 · 研究领域：Magnetic confinement fusion research、Laser-induced spectroscopy and plasma、Laser-Plasma Interactions and Diagnostics

A normal incidence vacuum ultraviolet (VUV) and a grazing incidence extreme ultraviolet (EUV) spectrometers have been developed for the edge and core impurity measurements in HL-2A tokamak. The VUV and the EUV spectrometers cover wavelength ranges of 300∼3200 Å and 50∼500 Å, respectively. A spatial resolution of 2 mm has been achieved for the VUV spectrometer when a space-resolved slit 50 μ m in width is used. The space-resolved slit is placed between the entrance slit and the grating of the spectrometer. The spectral resolutions of 0.15 Å for the VUV spectrometer in the wavelength coverage of the concave 1200 grooves/mm grating and of 0.22 Å for the EUV spectrometer at λ=200 Å with a flat-field laminar-type holographic grating are obtained. The sensitivity of the VUV spectrometer was calibrated in situ with the plasma bremsstrahlung radiation. The experimental results from both spectrometers are presented, especially the line intensity radial profiles measured by the VUV spectrometer.