金属卤化物灯等离子体参数的时空分布
Spatial and time-dependent distribution of plasma parameters in the metal-halide arc lamp
摘要：
几位作者指出，闭合高压电弧交流。在局部热力学平衡（LTE）模型的框架中不能描述添加金属卤化物的汞蒸气中的放电。然而，一些等离子体参数（电子和高躺激发态密度以及汞亚稳能级密度）被假定为与电子温度平衡，这些假设被应用于等离子体诊断。为了验证这些假设，发展了一种基于谱线空间和时间分布的局域等离子体光谱学方法。实验装置是基于大口径衍射光谱仪，空间扫描装置和光电探测器，它允许在电流周期的选定相位进行测量。数据采集和处理软件基于LabVIEW系统。联合数据处理的原始方法适用于包含源表面辐射的空间、光谱和时间分布的数据阵列。该方法以主成分理论为基础，考虑了谱线轮廓内光谱发射率之间的相关性，并允许对光谱发射率进行自相关。
英文摘要：
It was shown by several authors that closed high pressure arc a.c. discharge in mercury vapors with addition of metal halide cannot be described in frames of the local thermodynamic equilibrium (LTE) model. However some plasma parameters (electron and high lying excited states densities as well as Hg metastable levels densities) are assumed to be in equilibrium with electron temperature and these assumptions are applied in plasma diagnostics. To verify these supposition the method of local plasma spectroscopy based on spatial and temporal distribution of spectral line profiles was developed. The experimental set up is based on diffraction spectrometer with large aperture, spatial scanning device and photodetector, which allows to carry out the measurements in chosen phases of current period. The software for data acquisition and processing is based on LabVIEW system. The original method of joint data processing was applied to data arrays containing spatial, spectral and temporal distribution of a source surface radiance. The method is based on principal component theory, it takes into account the correlation between spectral emissivities inside spectral line profiles and allows ...
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