论文标题
平面波背景中极化光子的非线性康普顿散射
Nonlinear Compton scattering of polarised photons in plane-wave backgrounds
论文作者
论文摘要
我们研究了平面波背景中非极化电子对极化光子非线性康普顿散射的现象学。计算偏振光子的能量和角光谱是针对线性和圆形旋转脉冲，单色场和恒定跨场背景的。当场强度处于弱非线性状态时，预计不同极化状态中的光子具有非常不同的能量和角度分布。我们通过计算线性偏振的单色背景中的非线性汤姆森散射的光谱来解释这种差异，并将电子轨迹投射到不同的极化方向上。最后，我们计算了多GEV电子的方案，并通过考虑能量和角度分辨的光子极化纯度，找到一个可以实现偏振纯度超过$ 90 \％$的GEV-PHOTON BEAM。
We investigate the phenomenology of nonlinear Compton scattering of polarised photons by unpolarised electrons in plane-wave backgrounds. The energy and angular spectra of polarised photons are calculated for linearly- and circularly-polarised pulses, monochromatic fields and constant crossed field backgrounds. When the field intensity is in the weakly nonlinear regime, photons in different polarisation states are predicted to possess very different energy and angular distributions. We explain this difference by calculating the spectrum for nonlinear Thomson scattering in a linearly-polarised monochromatic background and projecting the electron's trajectory onto the different polarisation directions. Finally, we calculate a scenario for multi-GeV electrons and by considering the energy and angular-resolved photon polarisation purity, find one can achieve a GeV-photon beam with polarisation purities of over $90\%$.
