发表机构
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), UMR 9012; Laboratoire d’Optique Appliquée (LOA), CNRS, École polytechnique, ENSTA, Institut Polytechnique de Paris; Department of Physics, Lund University; FTMC – Center for Physical Sciences and Technology; Helmholtz-Zentrum Dresden-Rossendorf（伊雷娜·约里奥-居里双无穷大物理实验室; 应用光学实验室; 隆德大学物理系; 物理科学与技术中心; 德累斯顿-罗斯多夫亥姆霍兹中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用OPCPA激光器驱动100 Hz激光尾场加速器，产生稳定准单能电子束，通过非线性自聚焦实现局域电离注入，为高平均功率加速器奠定基础。
AI 中文摘要
我们展示了一台由高重复率光学参量啁啾脉冲放大（OPCPA）激光器驱动的激光尾场加速器，在100 Hz重复率下产生了稳定的、准单能电子束。使用70 mJ、8.1 fs的激光脉冲，我们获得了47 MeV的电子束，电荷量为15 pC，固有能散低于10%。对连续10000发激光脉冲的测量显示，峰值能量的均方根涨落仅为1.4%，电荷涨落为12%，同时指向抖动较低。主成分分析表明，光束涨落可由五个物理上可解释的模式描述，其中以低于1 Hz的缓慢变化为主。粒子模拟（PIC）重现了测量到的能谱，并表明非线性自聚焦将电离注入局域化，从而产生了观测到的窄能量分布。所展示的电子能量、电荷、束流质量和稳定性的结合，标志着向高平均功率激光等离子体加速器迈出了重要一步。
英文摘要
We demonstrate a laser-wakefield accelerator driven by a high-repetition-rate optical parametric chirped-pulse amplification (OPCPA) laser, producing stable, quasi-monoenergetic electron beams at 100 Hz. Using 70 mJ, 8.1 fs laser pulses, we obtain 47 MeV electron beams with 15 pC charge and an intrinsic energy spread below 10%. Measurements over 10,000 consecutive shots show rms fluctuations of only 1.4% in peak energy and 12% in charge, together with low pointing jitter. Principal-component analysis reveals that the beam fluctuations are described by five physically interpretable modes, dominated by slow variations below 1 Hz. Particle-in-cell simulations reproduce the measured spectrum and show that nonlinear self-focusing localizes ionization injection, resulting in the observed narrow energy distribution. The demonstrated combination of electron energy, charge, beam quality, and stability represents a significant step toward high-average-power laser-plasma accelerators.
