ERRATUM: Single Shot Coherence Properties of the Free-Electron Laser SACLA in the Hard X-ray Regime

F. Lehmkühler,C. Gutt,B. Fischer,M. Schroer,M. Sikorski,Sanghoon Song,W. Roseker,J. Glownia,M. Chollet,S. Nelson,K. Tono,T. Katayama,M. Yabashi,T. Ishikawa,A. Robert,G. Grübel

Published 2014 in Scientific Reports

ABSTRACT

We measured the coherence properties of the free-electron laser SACLA on a single shot basis at an X-ray energy of 8 keV. By analysing small-angle X-ray scattering speckle patterns from colloidal dispersions we found a degree of transverse coherence of βt = 0.79 ± 0.09. Taking detector properties into account, we developed a simulation model in oder to determine the degree of coherence from intensity histograms. Finally we calculated a coherence time of τc = 0.1 fs and a pulse duration of 5.2 fs which corresponds with previous predictions.

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