Enhanced high-gain harmonic generation for x-ray free-electron laser
Enhanced high-gain harmonic generation for x-ray free-electron laser
复制标题
DOI：
10.1063/1.2993179
复制
发表时间：
2008-10
影响因子：
4
通讯作者：
Q. Jia
中科院分区：
文献类型：
--
作者：
Q. Jia
谐波产生自由电子激光(HG-FEL)能够在真空、紫外和短波长区产生时间和空间相干脉冲。在这封信中，提出了一种易于实现的方案，显着提高了HG-FEL的性能，并扩展了其短波长范围。通过在色散段后增加一个短的倒相调制器，减小了电子的能散，同时增强了电子的微聚束。三维模拟证明了能量分散的减少和聚束的增强，并表明可以获得更强的高次谐波辐射。
The harmonic generation free-electron laser (HG-FEL) is capable of producing temporally and spatially coherent pulses in the vacuum ultraviolet and shorter wavelength regions. In this letter an easy-to-implement scheme that significantly enhances the performance of HG-FEL and extends its short-wavelength range is proposed. By adding a short phase-reversed modulator after the dispersive section, the electron energy spread is reduced and simultaneously the electron microbunching is enhanced. Three-dimensional simulations demonstrate the energy spread reduction and the bunching enhancement and show that more powerful higher harmonic radiation can be obtained.