527nm激光辐照盘靶背向散射能量测量  

Backscattered Light from Interaction of 527 nm Laser with Au and Al Disk Targets

作　　者：王传珂[1] 刘慎业[1] 王哲斌[1] 蒋刚[2] 况龙钰[1] 李文洪[1] 蒋小华[1] 刘永刚[1] 汤小青[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心高温高密度等离子体国家实验室,四川绵阳621900 [2]四川大学原子与分子物理研究所,四川成都610065

出　　处：《原子核物理评论》2006年第1期59-61,共3页Nuclear Physics Review

基　　金：国家863计划资助项目(863-804-3)~~

摘　　要：在星光Ⅱ激光装置上,测量了脉宽1 ns、能量40—110 J的527 nm激光在不同条件下辐照Au盘靶、Al盘靶的背向散射能量。结果表明:激光辐照Au盘靶时,在聚焦条件下背向散射能量约占打靶激光能量的7.8%;在束匀滑条件下背向散射能量份额下降到6.2%左右,证明了束匀滑可有效抑制背向散射。对比Au盘靶、Al盘靶背反能量与打靶激光能量关系曲线,可以看出背向散射能量与打靶激光能量基本上成线性关系。Au and Al disk target were irradiated with -1 ns, 40-110 J, 527 nm laser at Xingguang-Ⅱ facility. The backscattered lights by laser-produced plasma were studied experimentally. The results are in troduced in this paper. Backscattered light energy is 7.8% of laser energy when laser is focused on Au disk target; when laser beam is smoothed, it is 6.2%. The comparison shows that laser smoothing can restrain backscattered light efficiency. The experimental results ：also show that there is a linear relation between backscattered light energy and the laser energy.

关 键 词：激光等离子体 激光散射 背向散射 圆盘靶 

分 类 号：O536[理学—等离子体物理]