马赫反射和短暂的 toroidal 等离子体的形成
Vincent L Kooij1, Dirk Bouwmeester1,2
1Leiden University, Huygens-Kamerlingh Onnes Laboratory, Leiden, The Netherlands.
Physical review. E
|December 23, 2025
概括
在大气压下研究过渡的 toroidal 等离子体. 激光脉冲产生一个双叶核,产生冲击,形成一个状等离子体,然后分裂成两个环.
科学领域:
- 等离子体物理学的物理学
- 流体动力学 流体动力学
背景情况:
- 在大气压下激光诱导的等离子体生成对于各种应用至关重要.
- 了解瞬态等离子体结构的动态是控制其演变和应用的关键.
研究的目的:
- 在大气压下实验研究激光生成的 toroidal 等离子体的形成和演变.
- 为了阐明气体流动动力学和冲击波相互作用,负责状等离子体结构的形成和分裂.
主要方法:
- 用断层图像重建的截面成像以可视化气体流.
- 施莱伦成像和一种新的激光扫描探针成像技术.
- 热力学建模和故意破坏流体对称性的实验.
主要成果:
- 由单个激光脉冲产生的双叶片等离子核启动了这个过程.
- 产生的冲击的相互作用形成马赫反射,驱动气体流,塑造等离子体.
- 等离子体从圆盘演变为圆柱体,最后分裂成两个平行环.
结论:
- 这项研究证实了一种由冲击动力学和气体流动驱动的状等离子体形成的新机制.
- 观测到的状等离子体分裂成环,为我们提供了关于等离子体结构演变的见解.
- 这些发现与生成紧的圆形等离子体结构有关,在反应堆,点火,医学和封闭中具有潜在的应用.
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