arXiv 2608.15039physics.plasm-ph

携带轨道角动量（OAM）的激光脉冲驱动的激光尾场加速中的电子注入与束流动力学

Electron Dynamics in a Wakefield Accelerator Driven by Laser Pulses Carrying Orbital Angular Momentum

Q. Qian, M. Li, Y. Ma, P. T. Campbell, C-H. Chang, E. Denis, N. Ernst, R. Fedosejevs, B. Hou, A. James, M. W. von der Leyen, K. Krushelnick, C. Kuranz, A. Longm… 展开作者

Q. Qian, M. Li, Y. Ma, P. T. Campbell, C-H. Chang, E. Denis, N. Ernst, R. Fedosejevs, B. Hou, A. James, M. W. von der Leyen, K. Krushelnick, C. Kuranz, A. Longman, A. Maksimchuk, J. Nees, P. Norreys, T. Nutting, J. B. Ohland, J. Palastro, A. G. R. Thomas, R. Timmis, L. Willingale, M. Burger

首次发表 2026-08-31

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中文总结 AI 辅助

研究利用携带轨道角动量（OAM）的激光脉冲驱动激光尾场加速，实验获得双束流结构电子束，模拟揭示螺旋电子轨迹，为优化紧凑型激光加速器束流结构提供新途径。

中文摘要 AI 辅助

携带轨道角动量（OAM）的激光脉冲为控制等离子体基加速器提供了新的自由度。本文实验展示了由OAM激光脉冲驱动的激光尾场加速，产生具有明显宽带能谱和角结构化相空间的电子束。测量的能谱呈现双束流结构，带有关联的角色散，表明在等离子体尾场的多个方位角相位处发生了电子注入。粒子模拟重现了观测到的能谱特征，并揭示了由OAM诱导的尾场所驱动的螺旋电子轨迹。这些结果表明，激光驱动源的相位结构可塑造电子注入与加速动力学，为紧凑型激光驱动加速器中束流结构的优化控制开辟了途径。

英文摘要

Laser pulses carrying orbital angular momentum (OAM) provide a new degree of freedom for controlling plasma-based accelerators. Here, we experimentally demonstrate OAM-driven laser wakefield acceleration, producing electron beams with a two-beamlet structure that indicates unique azimuthal dynamics inside the plasma wake. Particle-in-cell simulations reproduced the observed spectral features and revealed helical electron trajectories driven by OAM-pulse-driven wakefields. These results show that the laser driver's phase structure can shape electron acceleration dynamics, opening a route to optimal control of beam structure in compact laser-driven accelerators.