| 激光推进技术中激光与工质相互作用 |
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| 引用本文： | 朱定强,郑力铭,蔡国飙.激光推进技术中激光与工质相互作用[J].北京航空航天大学学报,2004,30(7):635-639. |
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| 作者姓名： | 朱定强 郑力铭 蔡国飙 |
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| 作者单位： | 北京航空航天大学,宇航学院,北京,100083;北京航空航天大学,宇航学院,北京,100083;北京航空航天大学,宇航学院,北京,100083 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 基于激光推进的工作特点,对激光推进中激光与工质的相互作用进行了研究.分析了激光对工质的击穿过程,得到了击穿阈值的计算方法,计算了激光对空气和氢气的击穿阈值;对工质中激光的逆韧致吸收过程进行了研究,推导了逆韧致吸收系数的计算公式.以氢气和氩气为工质进行了算例计算,计算结果可对国外文献提到的试验中出现的等离子体"漂白"和等离子体不稳定现象进行合理的解释.
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| 关 键 词： | 阈值 激光加热 击穿 激光推进 逆韧致吸收 |
| 文章编号： | 1001-5965(2004)07-0635-05 |
| 收稿时间： | 2003-03-18 |
| 修稿时间： | 2003年3月18日 |
Interaction between laser and propellant gas |
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| Zhu Dingqiang,Zheng Liming,Cai Guobiao.Interaction between laser and propellant gas[J].Journal of Beijing University of Aeronautics and Astronautics,2004,30(7):635-639. |
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| Authors: | Zhu Dingqiang Zheng Liming Cai Guobiao |
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| Institution: | School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | Base on the characteristic of laser propulsion, an investigation was performed to find out the mechanism of the interaction between laser and propellant gas. The breakdown process of propellant gas was studied, calculation method of breakdown threshold value was obtained, the breakdown threshold value of hydrogen and air were calculated; the inverse bremsstrahlung absorption process was studied, calculation method of inverse bremsstrahlung absorption coefficient was obtained, the inverse bremsstrahlung absorption coefficient of hydrogen and argon were calculated. The result can reasonable explain the "blanch" phenomena and plasma instability in laser propulsion experimentation that is mentioned in some paper. |
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| Keywords: | threshold value laser heating breakdown laser propulsion inverse bremsstrahlung absorption |
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