Fully polarized Compton scattering from a beam of spin-polarized electrons is investigated in plane-wave backgrounds in a broad intensity region from the perturbative to the nonperturbative regimes. In the perturbative regime, polarized linear Compton scattering is considered for investigating polarization transfer from a single laser photon to a scattered photon, and in the high-intensity region, the polarized locally monochromatic approximation and locally constant field approximation are established and are employed to study polarization transfer from an incoming electron to a scattered photon. The numerical results suggest an appreciable improvement of about 10% in the scattering probability in the intermediate-intensity region if the electron’s longitudinal spin is parallel to the laser rotation. The longitudinal spin of the incoming electron can be transferred to the scattered photon with an efficiency that increases with laser intensity and collisional energy. For collision between an optical laser with frequency ∼1 eV and a 10 GeV electron, this polarization transfer efficiency can increase from about 20% in the perturbative regime to about 50% in the nonperturbative regime for scattered photons with relatively high energy.

中文翻译：

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平面波中的全偏振康普顿散射及其偏振传输

在平面波背景下，研究了自旋极化电子束的完全极化康普顿散射，研究了从微扰到非微扰区域的宽强度区域。在微扰状态下，考虑偏振线性康普顿散射来研究从单个激光光子到散射光子的偏振传递，在高强度区域，建立偏振局部单色近似和局部恒定场近似并用于研究从入射电子到散射光子的偏振转移。数值结果表明，如果电子的纵向自旋与激光旋转平行，则中等强度区域的散射概率可明显提高约 10%。入射电子的纵向自旋可以转移到散射光子，其效率随着激光强度和碰撞能量的增加而增加。对于频率~1 eV 的光学激光器和 10 GeV 电子之间的碰撞，对于具有相对高能量的散射光子，这种偏振转移效率可以从微扰状态下的约 20% 增加到非微扰状态下的约 50%。