High-energy γ -photon polarization in nonlinear Breit-Wheeler pair production and γ polarimetry

F. Wan, Yu Wang, Ren-Tong Guo, Yue-Yue Chen, R. Shaisultanov, Zhongfeng Xu, K. Hatsagortsyan, C. Keitel, Jian-Xing Li
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引用次数: 21

Abstract

The interaction of an unpolarized electron beam with a counterpropagating ultraintense linearly polarized laser pulse is investigated in the quantum radiation-dominated regime. We employ a semiclassical Monte Carlo method to describe spin-resolved electron dynamics, photon emissions and polarization, and pair production. Abundant high-energy linearly polarized gamma photons are generated intermediately during this interaction via nonlinear Compton scattering, with an average polarization degree of more than 50%, which further interacting with the laser fields produce electron-positron pairs due to nonlinear Breit-Wheeler process. The photon polarization is shown to significantly affect the pair yield by a factor beyond 10%. The considered signature of the photon polarization in the pair's yield can be experimentally identified in a prospective two-stage setup. Moreover, the signature can serve also for the polarimetry of high-energy high-flux gamma photons with a resolution well below 1% with currently achievable laser facilities.
非线性Breit-Wheeler对产生中的高能γ-光子偏振和γ偏振测量
研究了非极化电子束与反传播超强线偏振激光脉冲在量子辐射主导下的相互作用。我们采用半经典蒙特卡罗方法来描述自旋分辨电子动力学,光子发射和极化,以及对的产生。在此相互作用过程中,通过非线性康普顿散射产生了大量的高能线极化伽马光子,平均极化度大于50%,并通过非线性bret - wheeler过程与激光场进一步相互作用产生电子-正电子对。光子偏振对对产率的影响大于10%。所考虑的光子偏振在对的产率的特征可以在一个前瞻性的两阶段设置实验确定。此外,该特征还可以用于高能高通量伽马光子的偏振测量,目前可实现的激光设备的分辨率远低于1%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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