报道了使用1ns脉冲宽度钕玻璃大功率激光以P偏振及S偏振方式辐照倾斜的平面聚脂薄膜靶,用离子法测量比质量消融率、消融压力及流体动力学转换效率等参量的实验结果。靶面激光辐照强度为2×10~(12)W·cm~(-2)～1×10~(14)W·cm~(-2)。比较了实验和理论给出的定标规律。初步讨论了P偏振及S偏振两种入射情况下,消融参数及薄膜靶背面收集到的离子信号波形的差异。

Experimental results are presented about specific mass ablation rate, ablation pressure, hydrodynamic efficiency and other parameters by using ion measurements in laser produced plasmas obtained at tilted plain mylar targest irradiated by Nd: glass high power laser with both P polarization and 8 polarization. Laser irradiance on target surface is ranging from 2×1012 to 1014 W·cm-2. Experimental scaling laaw is compared with theory. The difference of ablation parameters and temporal ion signals collected from the back of the thin foils produced by different polarization of the incident light is preliminarily discussed.