吸气模式激光推进空气等离子体光谱

推进技术 ›› 2007, Vol. 28 ›› Issue (5): 546-549.

吸气模式激光推进空气等离子体光谱

余亮英,程祖海,左都罗,陈钰琦,曹华梁

华中科技大学光电子科学与工程学院湖北武汉430074;华中科技大学光电子科学与工程学院湖北武汉430075;华中科技大学光电子科学与工程学院湖北武汉430076;华中科技大学光电子科学与工程学院湖北武汉430077;华中科技大学光电子科学与工程学院湖北武汉430078

发布日期:2021-08-15
基金资助:
国家“九七三”项目(61328)

Laser-induced plasma spectroscopy on air-breathing mode

Inst.of Optoelectronics Science and Engineering,Huazhong Univ.of Science and Technology,Wuhan 430074,China;Inst.of Optoelectronics Science and Engineering,Huazhong Univ.of Science and Technology,Wuhan 430075,China;Inst.of Optoelectronics Science and Engineering,Huazhong Univ.of Science and Technology,Wuhan 430076,China;Inst.of Optoelectronics Science and Engineering,Huazhong Univ.of Science and Technology,Wuhan 430077,China;Inst.of Optoelectronics Science and Engineering,Huazhong Univ.of Science and Technology,Wuhan 430078,China

Published:2021-08-15

摘要/Abstract

摘要： 利用实验室自行研制的紫外预电离CO2激光器进行了激光等离子体实验,实验采用底面直径均为60mm,焦距分别为5 mm和10 mm的两种抛物面光船。介绍了激光等离子体光谱和明显的特征谱线,以及激光等离子体温度估计模型;分析了两种光船对激光等离子体的影响。实验表明:相同底面直径10 mm焦距光船产生的等离子体信号峰值和持续时间均略大于5 mm焦距光船;10 mm焦距光船产生的等离子体温度明显高于5 mm的,最大温度产生时间比5 mm光船要晚一些。

关键词: 二氧化碳激光器;激光等离子体;光谱

Abstract: The experiment of laser-induced plasma using the UV-preionized CO2 laser made was discussed.Two cylinder flight vehicles with parabolic inner surface were used in this experiment,which have the same aperture diameter 60mm,and the focal length were 5 mm and 10 mm,respectively. The spectroscopy of laser-induced plasma,the distribution of characteristic lines,and method for calculating plasma temperature was introduced.Furthermore,the influence of flight shape on the laser plasma was analyzed.The results show that,with the same aperture diameter,the maxium intensity of laser plasma with longer focal length flight was higher and the evolution time was longer as well as the maxium plasma temperature was higher.Furthermore the time reaching the maxium temperature was shorter than that with shorter focal length.

Key words: Carbon dioxide laser;Laser plasma;Optical spectrum

余亮英,程祖海,左都罗,陈钰琦,曹华梁. 吸气模式激光推进空气等离子体光谱[J]. 推进技术, 2007, 28(5): 546-549.