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

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 β(t) = 0.79 ± 0.09. Taking detector properties...

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Detalles Bibliográficos
Autores principales: Lehmkühler, Felix, Gutt, Christian, Fischer, Birgit, Schroer, Martin A., Sikorski, Marcin, Song, Sanghoon, Roseker, Wojciech, Glownia, James, Chollet, Mathieu, Nelson, Silke, Tono, Kensuke, Katayama, Tetsuo, Yabashi, Makina, Ishikawa, Tetsuya, Robert, Aymeric, Grübel, Gerhard
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4050387/
https://www.ncbi.nlm.nih.gov/pubmed/24913261
http://dx.doi.org/10.1038/srep05234
Descripción
Sumario: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 β(t) = 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 τ(c) = 0.1 fs and a pulse duration of 5.2 fs which corresponds with previous predictions.

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