利用太赫兹场条纹技术快速获取自由电子激光脉冲的时间特性

Fast retrieval of temporal characteristics of FEL pulses using streaking by THz field.

作者信息

Kazansky A K, Sazhina I P, Kabachnik N M

出版信息

Opt Express. 2019 Apr 29;27(9):12939-12944. doi: 10.1364/OE.27.012939.

DOI:10.1364/OE.27.012939

Abstract

A simple and very fast method for reconstruction of temporal structure of linearly polarized FEL pulses from the THz streaking spectra of photoelectrons is suggested. The method is based on a quantum mechanical approach within the strong-field approximation. The method is suitable for online retrieval of the temporal characteristics of the FEL pulses. It can be applied for any photon frequency in a broad range of FEL pulse duration with a proper selection of the streaking field. To enhance its accuracy, it is suggested to simultaneously analyze the streaking spectra for several emission angles.

摘要

提出了一种从光电子的太赫兹条纹光谱重建线性偏振自由电子激光脉冲时间结构的简单且非常快速的方法。该方法基于强场近似下的量子力学方法。该方法适用于在线检索自由电子激光脉冲的时间特性。通过适当选择条纹场，它可应用于宽范围自由电子激光脉冲持续时间内的任何光子频率。为提高其准确性，建议同时分析几个发射角的条纹光谱。