激光偏振参数对不同初始位置高能电子辐射特性的影响

Effects of laser polarization parameters on the radiation properties of energetic electrons at different initial positions

摘要:

为探究不同偏振参数特性的激光脉冲对激光场内不同初始位置的高能电子运动与功率辐射分布影响，以电磁学基本方程为基础建立电子激光对撞模型，借助MATLAB软件分析模拟出了不同偏振参数下不同初始位置的电子辐射空间分布特点。研究表明，随着偏振参数从0到1增加，其与不同位置的电子对撞产生的空间辐射分布呈双峰状向四周过渡；在初始位置一定时，辐射分布随偏振参数增大双峰逐渐下降扁平；在偏振参数一定时，辐射分布随初始位置变化而显现微小变化。同时发现在偏振参数为0.7，电子初始于z正半轴上距原点30μ?m位置出现电子单位空间立体角辐射最大值。

Abstract:

To investigate the effects of laser pulses with different polarization parameters on the motion and power radiation distribution of high-energy electrons at different initial positions in the laser field, an electron laser collision model is established on the basis of the basic equations of electromagnetism, and the spatial distribution characteristics of the electron oscillating radiation at different initial positions under different polarization parameters are simulated with the help of MATLAB software analysis. It is shown that with the increase of polarization parameter from 0 to 1, the spatial radiation distribution generated by collision with electrons at different positions shows a bimodal transition to the surrounding area; when the initial position is certain, the radiation distribution gradually decreases and flattens with the increase of the polarization parameter; and when the polarization parameter is certain, the radiation distribution shows small changes with the change of the initial position. At the same time, it is found that the maximum value of stereo angle radiation per electron unit space occurs at the polarization parameter of 0.7 with the electrons initially located on the z positive semi-axis at a position 30 μ?m from the origin.