摘要
用一维非平衡辐射流体力学程序，计算和分析了主脉冲激光斜入射与预脉冲垂直入射耦合作用锗靶介质的等离子体状态和激光增益区。研究表明，主脉冲以４０°斜入射与其垂直入射相比，在相同靶面功率密度下，电子、离子温度、等离子体烧蚀深度下降约１０％。在相同的靶面总能量下，４０°斜入射电子温度下降约１５％～２０％。采用主激光斜入射时间延迟技术，这种下降差别还会更小，能量吸收效率会更高，激光增益区更大。
The plasma state and the gain region produced by a oblique incidence laser at θ 0 =40° coupled with a vertical incidence laser on Ge target are studied and compared with that produced by a vertical incidence alone. The results show that the refractive effect of compled incidence is smaller in comparison with oblique incidence alone. If the laser power of vertical incidence is the same as coupled incidence on Ge target, the changes T e、 η Ge , lower within 10%. If the laser total energy of vertical-incidence is the same as coupled incidence on Ge target, the changes lower within 15%～20%.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
1998年第2期167-172,共6页
High Power Laser and Particle Beams
基金
国家863激光技术领域资助
关键词
耦合泵浦
斜入射
泵浦
预脉冲
激光
couple pumping, oblique-incidence pumping, prepulse technique
