ROSA: Reconstruction of Spectrogram Autocorrelation for Self-Amplified Spontaneous Emission Free-Electron Lasers

2018/11/28 by Svitozar Serkez, Serkez, Svitozar, Oleg Gorobtsov +7
Engineering · Physics and Astronomy · #Particle Accelerators and Free-Electron Lasers #Advanced X-ray Imaging Techniques #Laser-Plasma Interactions and Diagnostics

paper · pdf · doi:10.48550/arxiv.1811.11446

Abstract

In recent years X-ray Free Electron Lasers (XFELs) proved to be unmatched sources of ultrashort pulses of spatially coherent quasimonochromatic X-ray radiation. Diagnostics of XFEL emission properties, in particular pulse duration, spectrum and temporal profile is extremely important in order to analyze the experimental results. In this paper we propose a cost-effective method to examine these properties of Self-Amplified Spontaneous Emission (SASE) pulses. It only requires an ensemble of measured SASE spectra and provides the temporal autocorrelation of the ensemble-averaged Wigner distribution of SASE FEL pulses.

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