Abstract: The laser plasma micro propulsion technology developed in recent 10 years has been attracting considerable attention. Based on the physical model of laser plasma micro ablation with transmission mode,the theoretic model is proposed calculation results are given. It is found that thrust and impulse are affected by the laser pulse width and target material. Several noticeable problems are presented for the design of the laser plasma micro propulsion performance parameters. Thrust is measured by the ballistic pendulum the calculation results of the corrected physical model are in good agreement with the experiment.

Key words: Laser plasma micro propulsion;Theoretic model;Ballistic pendulum;Micro-thrust

摘要： 激光等离子体微推进技术经过近10年的发展,越来越受到业内人士的广泛关注。针对透射式激光等离子体微烧蚀物理过程,构建了理论分析模型,并进行了仿真。结合仿真结果,分析了激光脉宽和靶材的选取对烧蚀产生的推力和冲量的影响,提出了激光微烧蚀推进参数设计过程中,需要注意的几个问题。采用冲击摆系统测量激光微烧蚀靶材推力特性,对理论模型进行修正,与实验结果对比,模型与实验测量结果符合良好。

关键词: 激光等离子体微推进;理论模型;冲击摆;微推力