用光学方法对准稳态等离子加速器中产生的等离子流特性进行实验研究

A. A. Kartasheva, K. M. Gutorov, V. Podkovyrov, E. A. Muravyeva, K. S. Lukyanov, N. S. Klimov
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引用次数: 0

摘要

研究了准稳态等离子体加速器中产生的氢等离子体流的空间和时间相关特性。研究了电极间隙放电辐射的时空结构。确定了放电脉冲期间电极间隙等离子体发光区长度的变化范围。在加速器电极系统的输出端观察到了明亮的等离子辐射区域。在该区域观察到了杂质的存在和电子浓度值的增加。在等离子体流的整个传播过程中,都检测到了等离子体流辐射强度的波动。确定了这些波动的空间和时间特征。通过测量 Hβ 线的斯塔克展宽,获得了电极系统输出面附近的电子浓度值。首次使用两种方法同时获得了自由等离子体流电子浓度的时间依赖性。测量是在大大超过电极系统特征尺寸的距离内进行的,在这个距离内,等离子体流产生的电极内过程的影响会减小。第一种方法是测量 Hβ 的斯塔克展宽。第二种方法是使用外差干涉测量法。
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Experimental investigation of the characteristics of the plasma flow generated in quasi-stationary plasma accelerator using optical methods
The spatial and temporal dependencies of the characteristics of the hydrogen plasma flow generated in quasi-stationary plasma accelerator were investigated. The spatiotemporal structure of discharge radiation in the interelectrode gap was studied. The range of changes in the length of the plasma glowing region in the interelectrode gap during the discharge pulse was determined. The region with bright plasma radiation located in the output face of the accelerator electrode system was observed. The presence of impurities and increased electron concentration values were observed in this region. Fluctuations in the radiation intensity of the plasma flow were detected along the entire length of its propagation. The spatial and temporal characteristics of these fluctuations were determined. The electron concentration values near the output face of the electrode system were obtained by measuring the Stark broadening of the Hβ line. For the first time, the time dependence of the electron concentration of free plasma flow was obtained using two methods simultaneously. The measurements were conducted at a distance, which significantly exceeds the characteristic size of the electrode system and where the influence of interelectrode processes of plasma flow generation is reduced. The first is based on measuring the Stark broadening of Hβ. As a second method, heterodyne interferometry was used.
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