论文标题
QED级联脉冲脉冲中QED级联膨胀的流体动力学模型
Hydrodynamical model of QED cascade expansion in an extremely strong laser pulse
论文作者
论文摘要
在分析和数值上研究了单个强激光脉冲中自我维持的量子电动力学（QED）级联反应的发展。流体动力学方法用于构建级联进化的分析模型，其中包括在3D QED粒子中观察到的级联反应的关键特征（QED-PIC）模拟，例如级联血浆中的磁场优势和激光能量吸收。模型的方程以封闭形式得出，并通过数值求解。模型方程解决方案与3D QED-PIC模拟之间的直接比较表明，我们的模型能够很好地描述级联发展的复杂非线性过程。基于激光脉冲强度的相互作用的各种机制在模型方程的溶液和QED-PIC模拟的结果中都揭示了。
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.
