State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
Phys Rev Lett. 2011 Jul 15;107(3):035001. doi: 10.1103/PhysRevLett.107.035001. Epub 2011 Jul 11.
We report on near-GeV electron beam generation from an all-optical cascaded laser wakefield accelerator (LWFA). Electron injection and acceleration are successfully separated and controlled in different LWFA stages by employing two gas cells filled with a He/O2 mixture and pure He gas, respectively. Electrons with a Maxwellian spectrum, generated from the first LWFA assisted by ionization-induced injection, were seeded into the second LWFA with a 3-mm-thick gas cell and accelerated to be a 0.8-GeV quasimonoenergetic electron beam, corresponding to an acceleration gradient of 187 GV/m. The demonstrated scheme paves the way towards the multi-GeV laser accelerators.
我们报告了一种来自全光学级联激光尾流加速器（LWFA）的近 GeV 电子束产生。通过分别使用两个填充有 He/O2 混合物和纯 He 气体的气体室，可以成功地将电子注入和加速在不同的 LWFA 阶段中分离和控制。来自第一级 LWFA 的由电离诱导注入辅助产生的具有麦克斯韦谱的电子被注入到第二级 LWFA 中，其中使用了一个 3mm 厚的气体室，被加速到 0.8GeV 的准单能电子束，对应的加速梯度为 187 GV/m。所展示的方案为多 GeV 激光加速器铺平了道路。
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