论文标题
基于电流抽样的宽带高效率Thz-Fel的表征
Electro-optic sampling based characterization of broad-band high efficiency THz-FEL
论文作者
论文摘要
可以在零 - 裂隙的谐振条件下使用强锥形的螺旋螺旋式悬挂器在THZ FEL中获得极高的远光辐射能量转换效率，在零散联的谐振条件下，使用圆形波导将辐射组速度与电子束纵向速度匹配。在本文中，我们报告了基于第一个电彩样采样（EOS）的测量，对本机制中发出的宽带THZ FEL辐射脉冲。 THZ场波形分别在空间和时间域中分别使用多弹射和单发EOS方案重建。进行测量，以改变空调中的输入电子束能，从而提供了有关波导FEL中复杂动力学的见解。
Extremely high beam-to-radiation energy conversion efficiencies can be obtained in a THz FEL using a strongly tapered helical undulator at the zero-slippage resonant condition, where a circular waveguide is used to match the radiation group velocity to the electron beam longitudinal velocity. In this paper we report on the first electro-optic sampling (EOS) based measurements of the broadband THz FEL radiation pulses emitted in this regime. The THz field waveforms are reconstructed in the spatial and temporal domains using multi-shot and single-shot EOS schemes respectively. The measurements are performed varying the input electron beam energy in the undulator providing insights on the complex dynamics in a waveguide FEL.
