金属掺杂PVC靶材在两种激光辐照下的激光推进实验研究

Experimental study on laser propulsion with metal-doped PVC targets under irradiation of two different lasers

为了研究各类工质在不同激光器作用下的性质,采用TEA-CO2以及YAG激光器,对纯PVC靶材以及纳米/微米金属颗粒掺杂的PVC复合靶材进行了烧蚀测试,发现各种靶材在两种激光照射下的性能相差各异。在YAG激光照射下,各种靶材测试的冲量耦合系数均大于在TEA-CO2激光照射下的测量值,而比冲则正好相反;使用TEA-CO2激光器下的推进效率略高于YAG激光器。通过对烧蚀率的测试,确认了各种材料在不同激光下的烧蚀深度不同,而掺入金属后的靶材可以有效地减小烧蚀深度。

In order to study the performance of the targets under different lasers, the experiments of laser ablation of pure PVC and metal - doped composite PVC targets were performed by using TEA - CO2 and YAG lasers ; it is found that the targets show different performance under irradiation of different lasers. The coupling coefficient is significantly larger with the YAG laser than that with the TEA - CO2 laser; in contrast specific impulse is larger with the TEA - CO2 laser. Further mere, the propulsion efficiency is slightly higher with the TEA - CO2 laser than with the YAG laser. Based on the measurement of the ,ablation rate it is certified that the ablation depth varies with materials, and the metal doped target can reduce the ablation depth effectively.