在低电流下,高贵气体中的电流排放中的等离子体分层
Vladimir I Kolobov1,2, Robert R Arslanbekov2
1University of Alabama in Huntsville, Huntsville, Alabama 35899, USA.
Physical review. E
|February 20, 2025
概括
一个混合动力流体模型揭示了交流电流 (ac) 放电中的等离子体分层. 这项研究强调了动力学方法的必要性,以了解贵重气体排放中的分层.
科学领域:
- 等离子体物理学的物理学
- 非线性动力学是一种非线性动力学.
背景情况:
- 等离子体分层,或形成不同的层,是一种复杂的现象,在各种等离子体放电中观察到.
- 了解交流电流 (ac) 放电中的分层对于应用和基本等离子体物理学至关重要.
研究的目的:
- 通过混合动力流体模型在低等离子体密度下对高贵气体的空气排放中研究等离子体分层.
- 分析电子和离子运动在分层过程中的作用.
主要方法:
- 一种混合动力流体模型,将非局部电子动力方程,离子漂移扩散方程和Poisson方程结合起来.
- 在交流放电中为正列和近电极的自相一致的数值解决方案.
- 对时间平均和瞬间电场的电子和离子反应的分析.
主要成果:
- 观察到与电子无弹性能量平衡相关的特定减少电场 (E/p) 的恒定条纹.
- 发现了一种类似于诺瓦克定律的法则,表明站立条纹的非局部性质.
- 分层等离子体在动态状态下运行,由于不同的时间尺度,离子和电子对电场的反应不同.
结论:
- 在低密度的电流放电中等离子体分层是一种动态现象.
- 混合动力流体模型为研究这些现象提供了有效的替代粒子在细胞方法.
- 电子和离子时间尺度的差异是分层的一个关键驱动因素.
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