Using multidimensional particle-in-cell simulations, we show that an electron beam with a huge space charge can be accelerated to high energies by irradiating the edge of a solid density target with an intense femtosecond laser pulse at parallel incidence. The process of energy gain of each electron is divided into two parts: the transverse laser field and the longitudinal field of the excited surface plasma wave (SPW). It is shown that the longitudinal field of the SPW dominates the acceleration of the major part of electrons. This process leads to generation of a highly collimated electron beam with a huge space charge.

中文翻译：

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强激光中的电子加速——平行入射的固体相互作用

使用多维粒子胞内模拟，我们表明通过用平行入射的强飞秒激光脉冲照射固体密度目标的边缘，可以将具有巨大空间电荷的电子束加速到高能量。每个电子的能量增益过程分为两部分：横向激光场和受激表面等离子体波（SPW）的纵向场。结果表明，SPW 的纵向场主导了大部分电子的加速。这个过程导致产生具有巨大空间电荷的高度准直电子束。