Compressing electron pulses is important in many applications of electron beam systems. In this study, we propose to use optical beat notes to compress electron pulses. The beat frequency is chosen to match the initial electron pulse duration, which enables the compression of electron pulses with a wide range of durations. This functionality extends the optical control of electron beams, which is important in compact electron beam systems such as dielectric laser accelerators. We also find that the dominant frequency of the electron charge density changes continuously along its drift trajectory, which may open up new opportunities in coherent interaction between free electrons and quantum or classical systems.

中文翻译：

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带有光学节拍音符的电子脉冲压缩

压缩电子脉冲在电子束系统的许多应用中很重要。在这项研究中，我们建议使用光学节拍来压缩电子脉冲。选择拍频以匹配初始电子脉冲持续时间，这使得能够压缩具有宽范围持续时间的电子脉冲。此功能扩展了电子束的光学控制，这在诸如介电激光加速器等紧凑型电子束系统中非常重要。我们还发现电子电荷密度的主频率沿着其漂移轨迹不断变化，这可能为自由电子与量子或经典系统之间的相干相互作用开辟新的机会。