High-energy γ-photon polarization in nonlinear Breit-Wheeler pair production and γ polarimetry
High-energy γ-photon polarization in nonlinear Breit-Wheeler pair production and γ polarimetry
复制标题
非线性 Breit-Wheeler 对产生和 γ 偏振测定中的高能 γ 光子偏振
DOI：
10.1103/physrevresearch.2.032049
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发表时间：
2020
影响因子：
4.2
通讯作者：
Jian-Xing Li
中科院分区：
文献类型：
--
作者：
Feng Wan;Yu Wang;Ren-Tong Guo;Yue-Yue Chen;Rashid Shaisultanov;Zhong-Feng Xu;Karen Z. Hatsagortsyan;Christoph H. Keitel;Jian-Xing Li
在量子辐射占优的情况下，研究了非偏振电子束与反向传输的超强线偏振激光脉冲的相互作用。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，和对生产。在相互作用过程中，通过非线性Compton散射产生大量的高能量线偏振光子，平均偏振度超过50%，进一步与激光场相互作用，产生非线性Breit-Wheeler过程的正负电子对。的光子偏振显着影响对产量的一个因素超过10%。所考虑的签名的光子偏振对的产量可以在一个前瞻性的两阶段设置实验确定。此外，与目前可实现的激光设施的签名也可以用于高能量高通量光子的偏振。
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 polarizedphotons are generated intermediately during this interaction via nonlinear Compton scattering, with an average polarization degree of more than 50%, further interacting with the laser fields to produce electron-positron pairs due to the nonlinear Breit-Wheeler process. The photon polarization is shown to significantly affect the pair yield by a factor of more than 10%. The considered signature of the photon polarization in the pair's yield can be experimentally identified in a prospective two-stage setup. Moreover, with currently achievable laser facilities the signature can serve also for the polarimetry of high-energy high-fluxphotons.