毛细管放电X光激光中的预脉冲研究  

Pre-pulse research on capillary discharge pumped X-ray laser

作　　者：郑无敌[1] 彭惠民[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088

出　　处：《强激光与粒子束》2004年第12期1545-1548,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金重点资助课题(60038010);国家863计划项目资助课题

摘　　要：　为研究毛细管放电X光激光中预脉冲放电对增益的影响,用简化的XDCH程序,模拟计算了聚乙烯毛细管充Ar气、2μs脉宽的预脉冲放电过程,把预放电之后的等离子体温度、密度和电离度作为初始条件,输入XDCH程序,进行40kA典型主脉冲放电的计算模拟,给出了一些典型预放电幅度下的增益和电子密度分布情况。比较分析的结果发现,对2μs脉宽的预脉冲,100A的电流将得到较好的增益,并且预言激光线时间谱可能出现双峰结构,空间谱会出现环状结构。In order to study the influence by pre-pulse discharge on capillary discharge pumped X-ray Laser, a simplified XDCH code is used to simulate the process of pre-discharge with 2 μs pulse width in polythene capillary filled with Ar. The plasma temperature, density and ionization degree calculated as initial condition are input into XDCH code to simulate typical main-discharge with 40 kA. From the view of 1-dimension, some gain coefficient and electron density distributions with typical pre-pulse amplitudes are given. After analysis and comparison, conclusion is drawn that 100 A pre-pulse with 2 μs width can lead to higher gain. Two-peak structure in time spectrum and ring-like structure in space spectrum of 46.9 nm laser line are predicted.

关 键 词：毛细管放电 类Ne氩X光激光 预脉冲 增益系数 

分 类 号：TN24[电子电信—物理电子学]