论文标题
在Bremsstrahlung $γ-$ Quanta的碰撞中，非线性Breit-wheeler对生产和紧密聚焦的激光脉冲
Non-linear Breit-Wheeler pair production in collisions of bremsstrahlung $γ-$quanta and a tightly focussed laser pulse
论文作者
论文摘要
Breit-wheeler对创建过程的非扰动强场态度的实验努力，以结合GEV $γ$ Quanta的不连贯来源和紧密焦点的光学激光脉冲的相干领域。这项努力要求对这对的产量如何取决于应用的激光场轮廓有理论上的理解。我们提供了通过Bremsstrahlung产生高能辐射的设置中生产对数量的估计值。注意激光场的横向和纵向聚焦的作用，以及掺入高斯脉冲信封的作用。我们将相应的结果与平面波模型的预测进行了比较，并确定了聚焦激光脉冲的参数，这些脉冲在固定脉冲能量下最大化了对脉冲的产量。此外，讨论了各种超级高斯轮廓对激光脉冲包膜及其横向形状的影响。
Experimental efforts toward the detection of the nonperturbative strong-field regime of the Breit-Wheeler pair creation process plan to combine incoherent sources of GeV $γ$ quanta and the coherent fields of tightly focussed optical laser pulses. This endeavour calls for a theoretical understanding of how the pair yields depend on the applied laser field profile. We provide estimates for the number of produced pairs in a setup where the high-energy radiation is generated via bremsstrahlung. Attention is paid to the role of the transversal and longitudinal focussing of the laser field, along with the incorporation of a Gaussian pulse envelope. We compare our corresponding results with predictions from plane-wave models and determine the parameters of focused laser pulses which maximize the pair yield at fixed pulse energy. Besides, the impact of various super-Gaussian profiles for the laser pulse envelope and its transverse shape is discussed.
