Calibration of a VUV spectrograph by collisional-radiative modelling of a discharge plasma
Calibration of a VUV spectrograph by collisional-radiative modelling of a discharge plasma
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通过放电等离子体的碰撞辐射模型校准真空紫外光谱仪
DOI：
10.1088/0953-4075/43/14/144012
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
P. Vasu
中科院分区：
文献类型：
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作者：
R. Prakash;J. Jain;Vinay Kumar;R. Manchanda;B. Agarwal;M. Chowdhuri;Santanu Banerjee;P. Vasu
从实验观测到的可见光波段的谱线强度，探讨了氦中潘宁放电等离子体参数推断的可行性。碰撞辐射模型的ADAS（原子数据分析结构）代码和数据库已被用于此分析。电子密度，电子温度，基态原子和离子密度，也2 - 3S亚稳态密度的参数，从而估计。结果令人鼓舞。导出的等离子体参数，然后用于获得真空紫外（VUV）区域中的几条线的强度。这已经与观察到的真空紫外光谱线，同时记录的可见线，使用真空紫外光谱仪的强度校准是不可用的，到达校准因子。预计这种方法可能会提供一种替代的“分支比”的方法在真空紫外区的校准，一旦分析得到改善，并考虑到某些线路的可能的再吸收。
The feasibility of inferring the plasma parameters of a Penning discharge in helium, from the experimentally observed intensities of a number of spectral lines in the visible wavelength region, is explored. The collisional-radiative model of ADAS (atomic data analysis structure) code and database has been used for this analysis. The electron density, electron temperature, ground-state atom and ion densities and also the 2 3S metastable state density are the parameters thus estimated. The results are encouraging. The derived plasma parameters are then used to obtain the intensities of a few lines in the vacuum ultraviolet (VUV) region. This has been compared with the observed VUV spectral lines, recorded simultaneously with the visible lines, using a VUV spectrometer for which intensity calibration was not available, to arrive at calibration factors. It is expected that this approach might provide an alternative to the ‘branching ratio’ method for calibration in the VUV region once the analysis is improved and the possible re-absorption of certain lines is accounted for.