便携式森散射系统用于在低密度条件下进行暂时分辨的等离子体测量
1Department of Interdisciplinary Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan.
The Review of scientific instruments
|March 7, 2024
概括
我们开发了一个便携式的森散射系统,用于精确的等离子体测量. 一个隙空间过器配置提高了电推进应用的灵敏度.
科学领域:
- 等离子体物理学的物理学
- 诊断技术 诊断技术
- 光学工程是指光学工程.
背景情况:
- 准确的等离子体性能测量对于理解和优化等离子体器件至关重要.
- 现有的诊断方法往往缺乏动态等离子体现象所需的空间和时间分辨率.
研究的目的:
- 开发一种便携式的森散射诊断系统,用于同时,空间和时间分辨率的测量.
- 研究用于增强灵敏度和弹性抑制光的光学配置.
- 为了证明该系统在电推进应用中的能力.
主要方法:
- 使用一个紧的脉冲Nd:YAG激光器 (532nm) 作为光源.
- 使用的体积布拉格格孔过器用于弹性抑制光和单阶段光谱仪用于分散.
- 研究了两个光学配置:线性光纤束和裂空间波器.
- 开发了一种定制的脉冲等离子装置,具有20kHz调制.
主要成果:
- 与光纤捆绑相比,切片空间过器配置的灵敏度大约提高了两倍,空间响应更加均.
- 成功记录了电子数密度和温度变化,具有亚毫米空间分辨率.
- 在50μs的调制期内捕获了10个时间点,证明了时间分辨率.
- 实现了电子密度的检测极限为~1.6 × 10^17 m^-3.
结论:
- 开发的便携式森散射系统可实现高分辨率等离子体诊断.
- 隙空间过器配置在灵敏度和空间均性方面优越.
- 该系统适用于描述电力推进中的动态等离子体行为,例如霍尔推进器振荡.
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