圆偏振强激光真空中加速电子最佳参数的分析  

Analysis of the Optimum Parameters of Electron Acceleration by Circular Polarization Laser Pulse in Vacuum

作　　者：王凤超[1] 

机构地区：[1]上海应用技术学院理学院,上海201418

出　　处：《上海应用技术学院学报（自然科学版）》2014年第2期173-176,共4页Journal of Shanghai Institute of Technology: Natural Science

基　　金：上海市优秀青年基金资助项目(yyy10043);上海应用技术学院引进人才基金资助项目(YJ2010-13)

摘　　要：利用一维粒子模拟和解析的方法对圆偏振强激光在真空中加速电子进行了研究.研究表明,电子获得的最大能量与激光的强度有关,并且电子在激光场中加速有个最佳的加速距离,即当电子的位置与激光脉冲的峰值位置重合时,电子获得最大的能量,而最佳加速距离与激光脉冲的宽度和振幅有关.在电子获得最大能量的位置加入一个挡板能挡住激光而电子可以穿过,从而将电子从激光场中分离出来.Electrons accelerated by a high intensity laser pulse of circular polarization in vacuum were investigated by one-dimensional particle-in-cell simulations and analytical modeling. The research indicated that the maximum electron energy was related to the laser intensity. There was an optimal acceleration length for electrons to gain maximum energy where electrons met the peak of the laser pulse. The optimal acceleration length was highly dependent on the laser pulse duration and amplitude. In order to extract the energetic electrons from the laser field, a stopping target at the optimal position where the electrons gained maximum energy was put.

关 键 词：圆偏振激光 等离子体 电子加速 激光脉宽 

分 类 号：O437[机械工程—光学工程]