SASE FEL pulse duration analysis from spectral correlation function

A. A. Lutman, J. Krzywinski, Y. Ding, Y. Feng, Z. Huang, M. Messerschmidt, J. Wu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A new method to measure the X-rays pulse duration through the analysis of the statistical properties of the SASE FEL spectra has been developed. The information on the pulse duration is contained in the correlation function of the intensity spectra measured after a spectrometer. The spectral correlation function is derived analytically for different profile shapes in the exponential growth regime and issues like spectral central frequency jitter and shot by shot statistical gain are addressed. Numerical simulations will show that the method is applicable also in saturation regime and that both pulse duration and spectrometer resolution can be recovered from the spectral correlation function. The method has been experimentally demonstrated at LCLS, measuring the soft X-rays pulse durations for different electron bunch lengths, and the evolution of the pulse durations for different undulator distances. Shorter pulse durations down to 13 fs FWHM have been measured using the slotted foil.

Original languageEnglish (US)
Title of host publicationFEL 2011 - 33rd International Free Electron Laser Conference
Pages318-321
Number of pages4
StatePublished - Dec 1 2011
Externally publishedYes
Event33rd International Free Electron Laser Conference, FEL 2011 - Shanghai, China
Duration: Aug 22 2011Aug 26 2011

Publication series

NameFEL 2011 - 33rd International Free Electron Laser Conference

Other

Other33rd International Free Electron Laser Conference, FEL 2011
CountryChina
CityShanghai
Period8/22/118/26/11

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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  • Cite this

    Lutman, A. A., Krzywinski, J., Ding, Y., Feng, Y., Huang, Z., Messerschmidt, M., & Wu, J. (2011). SASE FEL pulse duration analysis from spectral correlation function. In FEL 2011 - 33rd International Free Electron Laser Conference (pp. 318-321). (FEL 2011 - 33rd International Free Electron Laser Conference).