Development of the preliminary vacuum ultraviolet spectroscopy on HL-2M tokamak

doi:10.16568/j.0254-6086.2021s2018

Abstract

Abstract: HL-2M vacuum ultraviolet (VUV) spectral diagnostic system is developed based a combination of
multiple Seya-Namioka spectrometers, each with an exchangeable grating. Due to an optimization in gratings, the
wavelength coverage of the whole spectral system is 300Å to 3000Å with temporal resolution better than 1µs.
After structural design and fabrication, spectral calibration and commissioning, a single channel VUV
spectrometer was successfully set up in HL-2M tokamak, viewing horizontally from a midplane port. Spectral
lines of impurity species (C, O, N) were observed in HL-2M first plasma discharges by the spectrometer, which
showed excellent signal-to-noise ratio and high sensitivity.

Key words: VUV, Impurity spectra, CEM, Hollow cathode light

摘要： 基于 Seya-Namioka 结构 200mm 焦距可换光栅，研制了 HL-2M 真空紫外(VUV)光谱诊断光谱仪。该
系统在 300~3000Å 的真空紫外光谱范围具有较高的探测效率，时间分辨优于 1µs。经过结构设计、光谱标定和安
装调试，单通道 VUV 光谱仪已成功安装在 HL-2M 装置中平面窗口。在 HL-2M 装置初始放电实验中，利用该系
统测量到 C、O、N 等杂质的多条特征谱线，展现出优秀的信噪比和高灵敏度。

关键词: 真空紫外光谱, 杂质光谱, 通道电子倍增管, 空心阴极灯

CLC Number:

O536

ZHANG Kai, ZHENG Dian-lin, DONG Chun-feng, SUN Ping, FENG Lei, SHI Zhong-bing . Development of the preliminary vacuum ultraviolet spectroscopy on HL-2M tokamak[J]. Nuclear Fusion and Plasma Physics, 2021, 41(s2): 527-532.

张凯, 郑典麟, 董春凤, 孙平, 冯雷, 石中兵. HL-2M 真空紫外光谱初始诊断系统研制[J]. 核聚变与等离子体物理, 2021, 41(s2): 527-532.

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Development of the preliminary vacuum ultraviolet spectroscopy on HL-2M tokamak

HL-2M 真空紫外光谱初始诊断系统研制

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