激光偏振参量对光场感生电离电子碰撞机制等离子体电离参量的影响  

Influence of Laser Polarization Parameter on the Plasma Ionization Parameter Based on Electron Collisional Scheme of Optical-Filed Ionization

作　　者：陈建新[1] 王骐[1] 夏元钦[1] 陈德应[1] 

机构地区：[1]哈尔滨工业大学光电子技术研究所可调谐激光技术国家重点实验室,哈尔滨150001

出　　处：《光学学报》2003年第3期321-325,共5页Acta Optica Sinica

基　　金：国家 8 6 3高技术激光技术主题 [86 3 4 10 3 9(J) ];国家自然科学基金 (6 0 0 780 10 )资助课题

摘　　要：以基于光场感生电离电子碰撞机制的类钯氙系统为例 ,计算并讨论了不同抽运激光偏振对等离子体的电离速率、阈值激光强度、电子在激光场中的剩余能量、各电荷态相对集居数、初始电子能量分布等电离参量的影响 ,计算结果表明 ,在相同的激光功率密度下 ,激光偏振对类钯氙 4 1.8nm 4d95d1S0 4d95 p1P1跃迁的X射线激光放大影响很大 ,圆偏振激光抽运更有利于类钯氙 4 1.8nm 4d95d1S0 4d95 p1P1跃迁的X射线激光放大的实现。The influence of laser polarization on the ionization parameters of Pd like Xe system including ionization rate, threshold intensity, residual energy in the laser field, relative population and original electron energy distribution are calculated and discussed. During calculation, the electron energy distribution based our establishing model is used. The calculated results show that laser polarization significantly effects the amplification of 41.8 nm 4d\+95d\{\}\+1S\-0\|4d\+95p\+1P\-1\% of Pd\|like Xe and circular polarization is in favor of realizing the amplification of X ray laser at the same laser intensity.

关 键 词：激光物理 电子碰撞机制 类钯氙系统 电离参量 偏振参量 

分 类 号：O437[机械工程—光学工程]