激光同步辐射在不同观测角度上的辐射特性研究  

Radiation characteristics of laser synchrotron radiation at different observation angles

作　　者：陈宇 蔡云峰 刘辉[1] 田友伟[1] CHEN Yu;CAI Yunfeng;LIU Hui;TIAN Youwei(College of science,Nanjing university of posts and telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学理学院,南京210023

出　　处：《激光杂志》2021年第2期24-27,共4页Laser Journal

基　　金：国家基金项目(No.10947170)。

摘　　要：利用高能电子在强激光场中散射发出激光同步辐射,根据Lorentz方程与电子能量方程构建高能电子与强激光场的对撞模型,并通过MATLAB软件模拟高能电子在与强激光场对撞时电子运动的三维轨迹以及不同观测角度上同步辐射的脉宽和最大功率,进而分析不同观测角度对激光同步辐射特性的影响。模拟结果表明,观测角度由0°增大到360°期间,激光同步辐射的最大功率先减小后增大,而其脉宽先减小后增大,两者都于观测角为180°处左右呈现出一定程度的对称。且在0度或360度处获得的最大辐射功率取值最大,脉宽最小,能量最集中。Laser synchrotron radiation is emitted by using high-energy electrons to scatter in an intense laser field.A collision model between a high-energy electron and an intense laser field is built based on Lorentz equation and electron energy equation.The three-dimensional trajectory of electron motion and the pulse width and maximum power of synchrotron radiation at different observation angles are simulated by MATLAB software and analyse the influence of different observation angles on laser synchrotron radiation characteristics.The simulation results show that the maximum power of laser synchrotron radiation first decreases and then increases when the observation angle increases from 0°to 360°,while the pulse width first decreases and then increases.Both of them show a certain degree of symmetry when the observation Angle is 180°.The maximum radiation power,the minimum pulse width and the most concentrated energy are obtained at 0 or 360 degrees.

关 键 词：激光同步辐射 观测角度 电子轨迹 辐射功率 MATLAB模拟 

分 类 号：O411.3[理学—理论物理]