强激光场下极化参数对电子运动和辐射特性的影响

Jianping Chang, P. Yu, Yichen She, Jingjing Yan, Youwei Tian
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摘要

以麦克斯韦方程和牛顿方程为出发点,针对目前无法直接测量超高激光参数的情况,采用理论推导和数值模拟的方法推导出低能单电子加速模型,并通过MATLAB迭代,研究分析了不同极化参数下激光脉冲阶电子的运动规律和空间辐射特性。结果表明:随着极化参数从0到1的增大,电子能量辐射的空间分布由线性平面变为螺旋形,总体趋势可分为4个阶段;电子的运动轨迹也由平面振荡变为螺旋振荡,自旋半径逐渐增大,峰值后半径的减小速度也减慢。通过以上研究,为全时间、全空间高能电子辐射及激光各种参数的抗探测实验研究提供了理论和数值模拟依据。
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Effect of polarization parameters on electron motion and radiation characteristics under intense laser field
With Maxwell equation and Newton equation as a starting point, according to the present situation cannot be directly measuring the parameters of the ultrahigh laser, the theoretical derivation and numerical simulation method is deduced low-energy single electron acceleration model, and through MATLAB iteration, studied and analyzed the different polarization parameters of the laser pulse order electronic movement rule and the characteristics of space radiation. The results show that as the polarization parameterincreases from 0 to 1, the spatial distribution of electron energy radiation changes from linear plane to spiral shape, and the overall trend can be divided into four stages. The trajectory of the electron also changes from the plane oscillation to the spiral, and the radius of the spin gradually increases, and the decreasing speed of the radius after the peak also slows down. Based on the above research, the theoretical and numerical simulation basis is provided for the experimental study of high-energy electron radiation in full time, full space and the anti-detection of various parameters of laser.
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