线状聚焦激光与金属作用的离子速度分布  

Ion velocity distribution study of line-focused laser irradiation on foils

作　　者：孙岚[1] 张燕珍[1] 徐至展[2] 

机构地区：[1]中国科学院上海光学精密机械研究所 [2]中国高等科学技术中心凝聚态与辐射物理中心

出　　处：《光学学报》1989年第10期888-892,共5页Acta Optica Sinica

摘　　要：本文报道了利用法拉第筒飞行时间法进行的离子测量.通过比较高功率激光线状聚焦和点状聚焦在平面金属靶上产生的离子发射特性,总结出离子速度分布和激光辐照密度的定标规律,以及离子速度分布的空间各向异性.实验是在上海光机所钕玻璃激光装置上进行的,激光束的波长为1.06μm,脉宽为300ps,辐照密度为10^(12)～10^(14)W/cm^2.We report the ion measurement of time-of-flight with Faraday cup and the ion energy with a simple analytic model involving an isothermal rarefaction. The targets were polished glass coated with 100A to 1μm of Al and Au foils. Irradiance was varied in the range 1012 to 1014 W/cm2 with constant laser power and variable focal size. Deductions include the scaling relationship of ion velocity at λ = 1.06μm with different focal size, and the anisotropic distributions have been clearly observed.

关 键 词：线状聚焦 激光 离子速度分布 

分 类 号：TN241.01[电子电信—物理电子学]