Hydrodynamical model of QED cascade expansion in an extremely strong laser pulse

A. S. Samsonov, I. Kostyukov, E. Nerush
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引用次数: 4

Abstract

Development of the self-sustained quantum-electrodynamical (QED) cascade in a single strong laser pulse is studied analytically and numerically. The hydrodynamical approach is used to construct the analytical model of the cascade evolution, which includes the key features of the cascade observed in 3D QED particle-in-cell (QED-PIC) simulations such as the magnetic field predominance in the cascade plasma and laser energy absorption. The equations of the model are derived in the closed form and are solved numerically. Direct comparison between the solutions of the model equations and 3D QED-PIC simulations shows that our model is able to describe the complex nonlinear process of the cascade development qualitatively well. The various regimes of the interaction based on the intensity of the laser pulse are revealed in both the solutions of the model equations and the results of the QED-PIC simulations.
超强激光脉冲中QED级联膨胀的流体动力学模型
本文对单强激光脉冲中自持续量子-电动力学(QED)级联的发展进行了分析和数值研究。采用流体动力学方法建立了级联演化的解析模型,该模型包含了三维QED粒子池(QED- pic)模拟中观察到的级联的关键特征,如级联等离子体中的磁场优势和激光能量吸收。该模型的方程以封闭形式导出,并进行了数值求解。将模型方程解与三维QED-PIC模拟结果直接比较,表明该模型能够较好地定性描述复杂的非线性叶栅发展过程。在模型方程的解和QED-PIC模拟结果中揭示了基于激光脉冲强度的相互作用的各种形式。
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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