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- Title
Single Shot Coherence Properties of the Free-Electron Laser SACLA in the Hard X-ray Regime.
- Authors
Lehmkühler, Felix; Gutt, Christian; Fischer, Birgit; Schroer, Martin A.; Sikorski, Marcin; Sanghoon Song; Roseker, Wojciech; Glownia, James; Chollet, Mathieu; Nelson, Silke; Tono, Kensuke; Katayama, Tetsuo; Yabashi, Makina; Ishikawa, Tetsuya; Robert, Aymeric; Grübel, Gerhard
- 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 5 0.1 fs and a pulse duration of 5.2 fs which corresponds with previous predictions.
- Subjects
FREE electron lasers; COHERENCE (Optics); LASER characteristics; SMALL-angle X-ray scattering; COLLOIDS; HISTOGRAMS
- Publication
Scientific Reports, 2014, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep05234