A THz-pulse-driven compact, < 150 mm in total length, two-stage electron accelerator setup was designed. It uses 2 × 2 pairs of nearly counter-propagating focused THz pulses. The effects of the initial bunch charge and the propagation direction of the THz pulses on the energy of the accelerated electrons were investigated by numerical simulations. Generation of 8 fC electron bunches with up to 340 keV energy; only 2.0% energy spread and compressed on-target duration of 200 fs is predicted using single-cycle low-frequency THz pulses with less than 4.5 mJ total energy.

中文翻译：

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太赫兹驱动的紧凑相对论电子源的设计

设计了太赫兹脉冲驱动的紧凑型，总长度小于150毫米的两级电子加速器装置。它使用2×2对几乎反向传播的聚焦THz脉冲。通过数值模拟研究了初始束电荷和太赫兹脉冲的传播方向对加速电子能量的影响。产生8个fC电子束，能量高达340 keV；使用总能量小于4.5 mJ的单周期低频THz脉冲，只能预测到2.0％的能量扩散和200 fs的压缩目标持续时间。