论文标题
朝着明亮的伽马射线闪光灯产生，从量身定制的靶标发射多帕塔特激光器
Towards Bright Gamma-Ray Flash Generation From Tailored Target Irradiated by Multi-Petawatt Laser
论文作者
论文摘要
激光 - 物种相互作用中的非凡现象之一是极有效的能量转移到$γ$ - photons，它看起来像是准直$γ$ ray beam。对于逼真的激光脉冲与物质的相互作用，背景场的存在起着至关重要的作用，因为它在主脉冲到达之前击中了目标，从而导致了预脉冲云，并在目标内钻出狭窄的通道。这些效果极大地改变了$γ$ - 光子的生成的过程。在这里，我们通过将目标相互作用的磁性水动力模拟结果导入到描述$γ$ - 光子产生的粒子中的模拟中。可以看出，背景场效应起着重要的积极作用，从而提高了激光脉冲与目标的效率，并产生了高能电子峰值对。可以预期，这种$γ$ - 光子源将在核光子学，材料科学和天体物理过程建模的各种应用中积极使用。
One of the remarkable phenomena in the laser-matter interaction is the extremely efficient energy transfer to $γ$-photons, that appears as a collimated $γ$-ray beam. For interactions of realistic laser pulses with matter, existence of a background field plays a crucial role, since it hits the target prior to the main pulse arrival, leading to a cloud of preplasma and drilling a narrow channel inside the target. These effects significantly alter the process of $γ$-photon generation. Here, we study this process by importing the outcome of magnetohydrodynamic simulations of the target interaction into particle-in-cell simulations for describing the $γ$-photon generation. It is seen that the background field effect plays an important positive role, enhancing the efficiency of laser pulse coupling with the target, and generating high energy electron-positron pairs. It is expected that such a $γ$-photon source will be actively used in various applications in nuclear photonics, material science and astrophysical processes modeling.
