两束碰撞laser的转动方向对超相对论电子辐射的影响
Influence of the rotational sense of two colliding laser beams on the radiation of an ultrarelativistic electron
摘要：
采用解析方法，研究了超相对论电子在两束反向传播的圆偏振强激光束中的经典动力学。假设粒子能量是系统中的主导尺度，推导出近似解，并分析了旋转方向对系统动力学的影响。定性的差异，电子的能量和动量被发现的激光束是同向旋转或反向旋转，并证实了经典的运动方程的精确数值解。尽管在电子轨迹的这些差异，电子的辐射光谱不偏离彼此定性的配置与不同的旋转方向的激光束。本文在Baier-Katkov半经典近似下给出了超相对论电子与反向传播激光束相互作用的辐射。几个参数制度被认为是从两种情况下产生的光谱都具有相同的形状，只有几个百分点的差异定量。
英文摘要：
With analytical treatment, the classical dynamics of an ultrarelativistic electron in two counter-propagating circularly polarized strong laser beams with either co-rotating or counter-rotating direction are considered. Assuming that the particle energy is the dominant scale in the setup, an approximate solution is derived and the influence of the rotational sense on the dynamics is analyzed. Qualitative differences in both electron energy and momentum are found for the laser beams being co-rotating or counter-rotating and are confirmed by the exact numerical solution of the classical equation of motion. Despite of these differences in the electron trajectory, the radiation spectra of the electron do not deviate qualitatively from each other for configurations with varying rotational directions of the laser beams. Here, the radiation of an ultrarelativistic electron interacting with counterpropagating laser beams is given in the framework of the Baier-Katkov semi-classical approximation. Several parameter regimes are considered and the spectra resulting from the two scenarios all have the same shape and only differ quantitatively by a few percent.
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