透射式激光烧蚀PVC冲量耦合性能实验

Measurements of impulse coupling coefficient for laser ablating PVC film on transmission mode

关键词:  激光  烧蚀  耦合系数  靶材厚度

Key words:  Laser  Ablation  Coupling coefficient  Thickness of target+

摘要:

激光烧蚀推进是激光推进中最有应用前景的研究分支,吸引了国内外大量学者的关注。为了研究透射式激光烧蚀条件下靶材厚度和激光能量对冲量耦合性能的影响,以二极管激光器作为能量源,玻璃作为透射层,对不同厚度、不同入射激光能量条件下,掺碳质量分数为2%的PVC薄膜进行了透射式激光烧蚀实验研究。冲量耦合系数最高为65.78μN/W,与国内外相关报道的数据相比较,结果规律一致性较好。研究结果证明了双层结构靶材的透射式激光烧蚀可以提高冲量耦合系数,入射激光能量与靶材厚度对冲量耦合性能影响较大。

Abstract:

As a new subject of laser propulsion,laser ablation propulsion has important applications and attracts the significant attention from scholars.To study the influence of laser flux and target thickness on impulse coefficient with transmission mode ablation,with different thickness of target and different laser energy,diode laser pulses transmit through a glass substrate and then they are focused into the adulterate PVC films with 2% carbon.The maximum impulse coupling coefficient got in the experiment is 65.78 μN/W.The measurement data are in good agreement with the results reported by other literatures.The results indicate that the impulse coupling coefficient enhances on transmission mode with the double layers target,and it is influenced intensively by the laser energy and thickness of target.