Hadjisolomou P, Jeong T M, Valenta P, Korn G, Bulanov S V
ELI Beamlines Centre, Institute of Physics, Czech Academy of Sciences, Za Radnicí 835, 25241 Dolní Břežany, Czech Republic.
Phys Rev E. 2021 Jul;104(1-2):015203. doi: 10.1103/PhysRevE.104.015203.
We present a regime where an ultraintense laser pulse interacting with a foil target results in high γ-photon conversion efficiency, obtained via three-dimensional quantum-electrodynamics particle-in-cell simulations. A single-cycle laser pulse is used under the tight-focusing condition for obtaining the λ^{3} regime. The simulations employ a radially polarized laser as it results in higher γ-photon conversion efficiency compared to both azimuthal and linear polarizations. A significant fraction of the laser energy is transferred to positrons, while a part of the electromagnetic wave escapes the target as attosecond single-cycle pulses.
我们展示了一种情况，即通过三维量子电动力学粒子模拟，超强激光脉冲与箔靶相互作用可实现高γ光子转换效率。在紧聚焦条件下使用单周期激光脉冲以达到λ³状态。模拟采用径向偏振激光，因为与方位角偏振和线性偏振相比，它能产生更高的γ光子转换效率。相当一部分激光能量转移到正电子上，而一部分电磁波以阿秒单周期脉冲的形式逃离靶体。
