Absolute intensity calibration of the Wendelstein 7-X high efficiency extreme ultraviolet overview spectrometer system.
Absolute intensity calibration of the Wendelstein 7-X high efficiency extreme ultraviolet overview spectrometer system.
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Wendelstein 7-X 高效极紫外概览光谱仪系统的绝对强度校准。
DOI：
10.1063/1.2977541
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
R. Burhenn
中科院分区：
文献类型：
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作者：
A. Greiche;W. Biel;O. Marchuk;R. Burhenn
用于仿星器温德尔斯坦7-X的新型高效极紫外全景光谱仪（HEXOS）系统现已安装在托卡马克技术导向研究实验（TEXTOR）上进行测试和调整。测试阶段的一部分是两个双光谱仪的强度校准，这两个双光谱仪总共覆盖了2.5到160.0 nm的光谱范围，并有重叠。本文给出了HEXOS的电流强度校准曲线，并描述了校准方法。校准是用空心阴极光源的校准线和分支比技术实现的。空心阴极光源提供从16到147 nm的校准线。我们可以通过使用未校准的箍缩极紫外光源发射的分支线对以及TEXTOR等离子体中硼和碳的发射线，将光谱仪中的校准区域扩展到2.8 nm。HEXOS的总校准范围为2.8至147 nm，涵盖了大部分可观察的波长区域。用输运程序模拟校准的真空紫外发射线，测得TEXTOR等离子体中18 ~ 35 cm小半径范围内碳的近似密度为5.5 × 10（17）m（-3），相当于局部碳浓度为2%。
The new high effiency extreme ultraviolet overview spectrometer (HEXOS) system for the stellarator Wendelstein 7-X is now mounted for testing and adjustment at the tokamak experiment for technology oriented research (TEXTOR). One part of the testing phase was the intensity calibration of the two double spectrometers which in total cover a spectral range from 2.5 to 160.0 nm with overlap. This work presents the current intensity calibration curves for HEXOS and describes the method of calibration. The calibration was implemented with calibrated lines of a hollow cathode light source and the branching ratio technique. The hollow cathode light source provides calibrated lines from 16 up to 147 nm. We could extend the calibrated region in the spectrometers down to 2.8 nm by using the branching line pairs emitted by an uncalibrated pinch extreme ultraviolet light source as well as emission lines from boron and carbon in TEXTOR plasmas. In total HEXOS is calibrated from 2.8 up to 147 nm, which covers most of the observable wavelength region. The approximate density of carbon in the range of the minor radius from 18 to 35 cm in a TEXTOR plasma determined by simulating calibrated vacuum ultraviolet emission lines with a transport code was 5.5x10(17) m(-3) which corresponds to a local carbon concentration of 2%.