初相位对激光驱动高能电子辐射空间谱和频谱的影响

Influence of Initial Phase on Spatial Spectrum and Spectrum of Laser Driven High Energy Electron Radiation

为了研究不同初相位所对应的激光驱动高能电子辐射空间谱和频谱,以Thomson散射经典理论和单电子模型为基础,借助MATLAB软件完成了数值模拟,深入讨论了初相位对激光驱动高能电子辐射空间谱和频谱的影响。研究结果表明:电子在焦点处对撞情况下,不同初相位的散射频谱特性并无较大差异,即单色性无明显变化;电子在远离焦点处对撞情况下,初相位的改变使得散射光的最大单次谐波能量及其对应的谐波次数呈周期性变化,其周期为π,曲线近似为三角函数曲线。

In order to study the spatial spectrum and spectrum of laser driven high-energy electron radiation corresponding to different initial phases,based on the classical Thomson scattering theory and single electron model,researhers completed the numerical simulation with the help of MATLAB software and deeply discussed the influence of the initial phase on the spatial spectrum and spectrum of laser driven high-energy electron radiation.The results show that when electrons collide at the focus,there is no significant difference in the scattering spectrum characteristics of different initial phases,i.e.,there is no obvious change in monochromaticity;When the electrons collide away from the focus,the change of the initial phase makes the maximum single harmonic energy of the scattered light and its corresponding harmonic number change periodically,the period isπ,and the curve is approximately a trigonometric function curve.