Experimental investigation of plasma jet and solid target interaction based on laser-ablation launching approach
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摘要: 利用激光烧蚀等离子体射流可以获得数km/s 甚至上千km/s 的射流速度，远超目前绝大多数设备所能提供的模拟速度，并且覆盖了极大的温度与密度范围，作为加载手段具有广阔的应用前景。通过实验方法，探索和发展激光烧蚀等离子体射流这一新型实验模拟手段，利用高功率激光烧蚀产生高温高压等离子体射流，实现超高速气体动力学实验室模拟的新途径。以此作为加载条件，研究超高速物体与气体相互作用的气体动力学特性。通过建立激光烧蚀等离子体射流与固体靶相互作用实验方法，可进一步研究等离子体射流的产生、发展以及高速物体气体动力学，为下一步开展天体物理、小行星形貌、超高速陨石与行星大气相互作用机制等相关研究奠定基础。
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关键词:
- 激光烧蚀 /
- 超高速等离子体射流 /
- 射流与固体靶相互作用 /
- 气体动力学
Abstract: Laser-ablation plasma has been regarded as a novel approach for providing high velocity loading in experiment. Axial jet velocity of km/s even higher than 5 km/s could be achieved by employing laser-driven plasma method. On the other side , a wide range of jet temperature and plasma density could also be obtained during the loading process. This paper presents an experimental method to investigate the super high-velocity impact of solid target with gas. A high energy laser-ablation plasma device was established in this work, and plasma with jet velocity above 10 km/s was generated during the experiment. The aerodynamic characteristics of the high-velocity object’s interaction with gas were studied in the experiment. The results of prove that, this work, the method has great potential for applications in the research of many fields including astrophysics, asteroid morphology, and the interaction of aerolith with atmosphere. -
图 1 激光烧蚀等离子体射流与固体靶作用方案
Figure 1. Laser-ablation plasma jet-solid target interaction scheme
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