瞬态电子碰撞激发类氖锗19.6nm X射线激光的理论研究  

Theoretical study of TCE Ne-like Ge 19.6nm X-Ray laser

作　　者：乔秀梅[1] 张国平[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：《物理学报》2007年第9期5248-5251,共4页Acta Physica Sinica

基　　金：国家高技术研究发展计划(863计划)项目(批准号:803-804-7-1)资助的课题.~~

摘　　要：近来,许多实验室仅采用一个脉宽为几个ps的短脉冲就得到了强放大的软X射线激光.这表明瞬态是来得及电离的.为此,在类氖锗的瞬态电子碰撞激发19.6nm波长X射线激光研究中,提出了采用低预脉冲产生低电离度的预等离子体,后续一个ps级短脉冲既电离又加热等离子体的驱动方式.并用系列程序进行了模拟.模拟结果表明,这种驱动方式也可以得到高增益.Strongly amplified X-ray laser observed in the recent transient collisional excitation （TCE） experiments pumped by a single short pulse suggests that with the help of low level prepulse producing lowly ionized preplasma it is also possible to obtain high gain in the TCE scheme. The TCE Ne-like Ge 19.6nm X-ray laser pumped by low level prepulse were studid with our code series. Time evolution of plasma status shows that the position of peak gain drifts outward and the gain region is widened as time goes on, which is similar to the QSS scheme.

关 键 词：X射线激光 等离子体 增益系数 瞬态电子碰撞激发 

分 类 号：O434.1[机械工程—光学工程]