光学学报, 2020, 40 (6): 0632001, 网络出版: 2020-03-06
基于太赫兹调制的超快X射线脉冲长度复原方法 下载: 1327次封面文章
Algorithm to Reconstruct Ultra-Fast X-Ray Pulse Based on Terahertz Modulation
超快光学 飞秒激光技术 太赫兹 X射线脉冲长度 光电子能谱 双脉冲复原 ultrafast optics femtosecond laser technology terahertz X-ray pulse length photoelectron energy spectrum retrieval of double-pulse
摘要
国家自然科学基金、国家“计划”青年项目基金、国家973计划;
Abstract
A full-energy dynamic model is developed to simulate the behavior and evolution of a free electron laser(FEL)pulse induced photoelectron wave-packet within an external single-cycle terahertz field, and the streaked photoelectron energy spectrum is significantly broadened at the zero crossing of terahertz vector potential, which could be used to retrieve the FEL pulse length. Further analysis and comparison of the pulse recovery errors of photoelectron wave packets with different pulse lengths at different delays, and the accuracy requirements of time synchronization in actual measurement are evaluated. In addition, a scheme for measuring the double -pulse delay is proposed, and the accuracy of the scheme is verified by numerical calculations.
李成名, 李宾. 基于太赫兹调制的超快X射线脉冲长度复原方法[J]. 光学学报, 2020, 40(6): 0632001. Chengming Li, Bin Li. Algorithm to Reconstruct Ultra-Fast X-Ray Pulse Based on Terahertz Modulation[J]. Acta Optica Sinica, 2020, 40(6): 0632001.