初始位置对电子运动轨迹和空间角辐射的影响  

Influence of initial position on the trajectory and spatial angular radiation of electrons

作　　者：朱佳宇 高周景明 蒋凌峰 田友伟[2] ZHU Jiayu;GAO Zhoujingming;JIANG Lingfeng;TIAN Youwei(Bell Honors School,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;College of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学贝尔英才学院,南京210023 [2]南京邮电大学理学院,南京210023

出　　处：《激光技术》2023年第2期220-224,共5页Laser Technology

摘　　要：为了探究在圆偏振激光脉冲中电子初始位置对其运动轨迹和空间角辐射的影响,根据非线性汤姆逊散射模型、能量方程以及拉格朗日方程推导出了高能电子的空间运动方程,并与MATLAB数值模拟的方法相结合,做出了高能电子空间运动轨迹图和空间角辐射模拟图。结果表明,电子在涡旋横向力的作用下在全空间运动的前部轨迹呈紧密分离螺旋状,而后部轨迹由空间间隔遥远的稀疏圆组成,随着电子初始位置的右移,空间角辐射达到最大值时,极角θ和方位角φ的值有不断减小的趋势,在z0=5λ0后趋于稳定,(θ,φ)=(23.5°,175.5°);激光脉冲中电子初始位置的改变对电子的运动轨迹和空间角辐射有较大影响。该结果为后续研究电子初始位置对高能电子辐射特性的影响奠定了基础。For the sake of studying the initial position’s influence of electrons on the trajectory and spatial angular radiation of high-energy electrons in circularly polarized laser pulses,the spatial motion equation of high-energy electrons was deduced theoretically on the basis of nonlinear Thomson scattering model,energy equation,Lagrange equation,and in combination with the assistance of MATLAB numerical simulation,the spatial motion trajectory diagram and spatial angular radiation simulation diagram of high-energy electrons made.The results show that,under the action of the transverse vortex force,the front trajectory of the electron in the whole space is in a tightly separated spiral shape,and the rear trajectory is composed of sparse circles with distant spatial spacing.With the right shift of the initial position of the electron,the value of the polar angle θ and azimuth φ has a decreasing trend when the spatial angular radiation reaches the maximum.Specifically,it becomes stable when z 0=5λ0 and(θ,φ)=(23.5°,175.5°).Therefore the change of the initial position of the electron in the laser pulse has a great influence on the trajectory and spatial angular radiation of the electron,which creates the groundwork for the subsequent research of the initial position’s influence of the electron on the radiation characteristics of high-energy electrons.

关 键 词：激光物理 非线性汤姆逊散射 数值模拟 圆偏振高斯激光 初始位置 电子运动 

分 类 号：TN241[电子电信—物理电子学] O441.4[理学—电磁学]