超短电子脉冲在聚焦强激光场中的三维有质动力散射  

Three dimensional pondermotive scattering of ultrashort electron beam in the field of focused ultraintense laser pulse

作　　者：刘运全[1] 张杰[1] 武慧春[1] 盛政明[1] 

机构地区：[1]中国科学院物理研究所光物理重点实验室,北京100080

出　　处：《物理学报》2006年第3期1176-1180,共5页Acta Physica Sinica

基　　金：国家自然科学墓金(批准号:10374116;60321003;10390161);高技术惯性约束聚变主题资助的课题.~~

摘　　要：采用三维测试粒子模拟(test-padicle simulation)的方法,研究了聚焦的飞秒脉冲强激光与超短电子束进行有质动力的散射过程.详细讨论了超短电子束经过不同激光延迟下有质动力散射的空间分布特征和能谱特征.提出了通过测量电子束的空间分布和能谱分布实现对超短脉冲电子束的脉冲宽度测量的方法.Using a three-dimensional test particle simulation code, we study the pondermotive scattering of an ultrashort electron beam subject to a focused uhraintense femtosecond laser pulse. The dependence of the spatial distribution of electron beam and electron energy spectrum on the time delay between laser pulse and electron pulse is discussed in detail. Through the measurement of the spatial distribution of electron beam or electron spectrum, we present a method to measure the duration of an ultrashort electron pulse.

关 键 词：有质动力散射 聚焦的飞激光 飞秒电子束 

分 类 号：TN241[电子电信—物理电子学]