中文摘要：

针对激光驱动惯性约束聚变（LICF）装置中靶室常用的几种铝合金和不锈钢材料，采用波长为1064nm、脉宽为8ns的基频激光进行烧蚀实验，研究了不同激光能量密度下其质量损失同辐照激光脉冲数的关系，测试了烧蚀深度随激光能量密度增长的关系。研究表明，铝合金在激光能量密度大于1．0J／cm2时有明显烧蚀，激光通量为1．2～5．2J／cm2时，质量烧蚀速率增长缓慢，平均质量烧蚀速率为2．31±0．89μg／cm2／shot。铝合金的烧蚀深度随激光能量密度增加而增加，不锈钢的烧蚀深度先增加而后呈下降趋势；铝合金的烧蚀深度明显高于不锈钢的烧蚀深度。基于材料对激光的吸收率明显的不同，分析了其烧蚀机理。该研究对LICF靶室材料的选取及金属的激光打孔、切割等加工有一定的参考意义。

英文摘要：

Nanosecond laser damage of several aluminum and stainless steel are investigated, which materials are commonly used in the target chamber of laser drive inertial confinement fusion （LICF） device. The experimental data on mass removal and ablation depth during 1064 nm, 8 ns fundamental frequency laser ablation are measured. The results show that the aluminum is ablated obviously when the laser fluence is greater than 1.0 J/cm2. The ablation rate of aluminum increased slowly, which has an average value of 2.31±0.89 μg/cm2/shot under laser fluence of 1.2- 5.2 J/cm2. Furthermore, the ablation depth of aluminum increases with the increase of laser fluence, while that of stainless steel increases at first and then decreases. Aluminum alloy＇s ablation depth is significantly higher than that of stainless steel. The ablation mechanism is discussed. The 1064 nm laser absorption of stainless steel is much higher than that of aluminum, which effects the laser energy deposition processes. This study is very helpful to LICF target chamber materials＇ selection and laser drilling or cutting of the metals.