论文标题
通过紧密聚焦的激光脉冲对电子束的瞬时chirp重建
Transient chirp reconstruction of electron beam via tightly focused chirped laser pulse
论文作者
论文摘要
控制颗粒梁的相空间对于基于等离子体的加速器中高质量的超短电子束的产生至关重要。准确地诊断出在加速开始时迅速发展的瞬时能量呼叫提出了重大挑战。本文介绍了一种新的方法，用于通过采用紧密聚焦和刺耳的激光脉冲来重建超短电子束的瞬时能量呼叫。我们研究了增强电子束差异调制的条件，并根据调制差异的固有相相关性，说明了瞬态chirp的重建，这些相关性会投影到特定相位空间坐标上。此外，我们通过将傅立叶变换施加到频域中的重建差异调制来估计激光和电子束之间的时间延迟。这种方法有望优化加速器性能，并促进超快电子衍射中的定时抖动的探测。
Controlling the phase space of particle beams is essential for the generation of high-quality, ultrashort electron beams in plasma-based accelerators. Accurately diagnosing the transient energy chirp, which evolves rapidly at the onset of acceleration, presents a significant challenge. This paper introduces a novel method for reconstructing the transient energy chirp of ultrashort electron beams by employing tightly focused and chirped laser pulses. We investigate the conditions that enhance the modulation of electron-beam divergence and illustrate the reconstruction of transient chirp based on the intrinsic phase correlation of the modulated divergence as projected onto specific phase space coordinates. Additionally, we estimate the temporal delay between the laser and electron beam by applying a Fourier transform to the reconstructed divergence modulation in the frequency domain. This approach holds promise for optimizing accelerator performance and facilitates the probing of timing jitter in ultrafast electron diffraction with attosecond-level precision.
