紧聚焦激光中电子轨迹及空间辐射的非对称性  

The asymmentry of the electron trajectory and spatial radiation in tightly focused laser

作　　者：申雨婷 张家晨 常一凡 徐瑞杰 田友伟[1] SHEN Yuting;ZHANG Jiachen;CHANG Yifan;XU Ruijie;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：《激光技术》2022年第6期779-783,共5页Laser Technology

基　　金：国家自然科学基金资助项目(10947170)。

摘　　要：为了探究不同对撞中心下与紧聚焦圆偏振高斯激光对撞的单个运动电子的3维轨迹和空间辐射特性,基于激光与电子相互作用及非线性汤姆逊散射的理论框架,建立模型进行了数值模拟,并对数值结果进行了可视化分析。结果表明,电子运动轨迹振幅在λ_(0)处达到0.151752λ_(0)(λ_(0)=1μm)的峰值,而在-λ_(0)处达到0.151662λ_(0)的谷值,呈现非对称性;电子的最大辐射角和辐射强度随对撞中心位置具有周期性变化的规律;辐射脉冲产生的全时段中,脉冲出现最大峰值的主峰和峰值略低的次峰现象。该研究结果为新一代X射线发生器的建设提供了理论基础。To study the 3-D trajectory and spatial radiation characteristics of collisional moving electrons of closely focused circularly polarized Gaussian pulses with different collision centers,a numerical simulation within the framework of laser-electron interaction and nonlinear Thomson scattering was performed.The results show that,the amplitude of the motion trajectory reaches to the peak value of 0.151752λ_(0)(λ_(0)=1μm)at the position ofλ_(0),whereas the valley value is 0.151662λ_(0) at the position of-λ_(0),presenting a asymmetry.Through visual display and numerical results,the law of the maximum radiation angle and radiation intensity of electron radiation changing with the collision center was described.Finally,the variation of radiation pulses was studied.The pulse with a primary peak and a sub peak over time was discovered.This research provides a rationale for the building of new generations of X-ray detectors.

关 键 词：激光物理 非对称性 数值模拟 紧聚焦激光 

分 类 号：O411.3[理学—理论物理]