组合激光辐照Q235钢靶的实验研究  

Investigation on the irradiation effects of Q235 steel targets by combined laser

作　　者：焦路光[1] 赵国民[1] 陈敏孙[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《红外与激光工程》2011年第5期848-852,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金项目(60908027)

摘　　要：基于组合激光的新概念,采用1053nm脉冲激光、1064nm重频激光,实验上研究了组合激光对Q235钢靶的辐照效应。表面能谱分析和表面反射率测量结果表明:随着1053nm激光对钢靶辐照脉冲数目的增多,表面逐渐氧化,导致表面反射率降低;辐照脉冲数目增大到一定程度后,氧化反应完全,反射率不再发生明显变化。1064nm激光辐照钢靶的温度场测量结果表明:采用高功率脉冲激光对钢靶表面进行一定程度的预辐照,能够大幅提高目标靶对后续激光的吸收能力。Based on the new concept of combined laser,the irradiation effects of Q235 steel targets by 1 053 nm pulse laser and 1 064 nm repetitive pulse laser were investigated.By measuring the reflectivity and analyzing the surface energy spectrum of the steel targets irradiated by 1 053 nm laser,it is revealed that the reflectivity decreases as the pulse number increases at a certain range which is caused by the oxidation of the surface.Reflectivity will not change remarkably when the pulse number increases to a certain degree because of the termination of the oxidation process.By measuring the temperature fields of the steel targets irradiated by 1 064 nm laser,it is concluded that the absorbency can be increased remarkablely by pre-irradiation of high-power pulse laser to the steel targets.

关 键 词：激光与物质相互作用 组合激光 脉冲激光 反射率 温度场 

分 类 号：TN249[电子电信—物理电子学]