在偏转laser驱动的等离子体摆动器中通过操纵低能扩展电子束增强的电子感应加速器辐射
Enhanced betatron radiation by steering a low-energy-spread electron beam in a deflected laser-driven plasma wiggler
摘要：
激光尾流场加速器（LWFA）在产生高质量高能电子束（e束）的同时，还能通过电子感应加速器（Betatron）辐射产生明亮的X射线源，这对超快科学的泵浦探测研究具有重要的应用前景。然而，为了获得高质量的电子束，电子注入和加速应仔细操纵，其中必须避免大的振荡幅度，因此发射的X射线产率是有限的。在这里，我们报告了一个新的计划，实验上提高电子感应加速器辐射显着的光子产额和光子能量分离的电子注入和加速从操纵的电子束横向振荡在尾流通过引入倾斜的薄等离子体折射板。粒子模拟表明，电子束横向振荡幅度可以增加超过10倍，转向后，由于在板的边界处的折射偏转的激光驱动的尾流场。由于在等离子体摇摆器制度的低能量扩展的电子束的峰值能量的小的变化，可以抑制的X射线的光谱展宽。结果表明，高质量电子束的产生、折射和摆动可以作为一个整体，在一个紧凑的LWFA中实现单能电子束和亮X射线的同时产生。
英文摘要：
Laser wakefield accelerators (LWFA) hold great potential to produce high-quality high-energy electron beams (e beams) and simultaneously bright x-ray sources via betatron radiation, which are very promising for pump-probe study in ultrafast science. However, in order to obtain a high-quality e beam, electron injection and acceleration should be carefully manipulated, where a large oscillation amplitude has to be avoided and thus the emitted x-ray yield is limited. Here, we report a new scheme to experimentally enhance betatron radiation significantly both in photon yield and photon energy by separating electron injection and acceleration from manipulation of the e-beam transverse oscillation in the wake via introducing a slanted thin plasma refraction slab. Particle-in-cell simulations indicate that the e-beam transverse oscillation amplitude can be increased by more than 10 folds, after being steered into the deflected laser-driven wakefield due to refraction at the slab's boundaries. Spectral broadening of the x-rays can be suppressed owing to the small variation in the peak energy of the low-energy-spread e beam in a plasma wiggler regime. We demonstrate that the high-quality e-beam generation, refracting and wiggling can act as a whole to realize the concurrence of monoenergetic e beam and bright x-rays in a compact LWFA.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
