Spectroscopic measurements of electron density of capillary plasma based on Stark broadening of hydrogen lines.
Spectroscopic measurements of electron density of capillary plasma based on Stark broadening of hydrogen lines.
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DOI：
10.1103/physreva.43.5568
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发表时间：
1991-05
期刊：
影响因子：
--
通讯作者：
Ashkenazy;Kipper;Caner
中科院分区：
文献类型：
--
作者：
Ashkenazy;Kipper;Caner
本文描述了一组由准稳态工作的高压放电毛细管产生的等离子体射流的电子密度的测量。测量方法是基于氢原子H α和H β谱线的斯塔克展宽与电子密度的关系。光谱进行电子采样，在电脉冲持续时间的时间积分，为各种毛细管电流，并在不同的轴向位置沿着新兴的等离子体射流。模型预测[Loeb和Kaplan，IEEE Trans.Magn.25，342（1989）]与通过应用Stark加宽理论[Griem，Spectral Line Broadening by Plasma（Academic，纽约，1974）]表明在测试电流（1-8 kA）和密度（10 17-10 19 cm-3）范围内具有良好的一致性。在较大的密度下，自吸收可能是一个问题。
A set of measurements of the electron density of plasma jets, generated by a high-pressure discharge capillary operating at quasi-steady-state, is described. The method of measurement is based on the dependence of Stark broadening of the hydrogen H α and H β spectral lines on the electron density. Spectra were sampled electronically, time integrated over the electrical pulse duration, for various capillary currents and at different axial locations along the emerging plasma jet. The comparison of model predictions [Loeb and Kaplan, IEEE Trans. Magn. 25, 342 (1989)] with electron densities deduced from these spectra, by applying the theory of Stark broadening [Griem, Spectral Line Broadening by Plasma (Academic, New York, 1974)], indicates a good agreement over the tested current (1–8 kA) and density (10 17–10 19 cm− 3) ranges. At larger densities, self-absorption might be a problem.