title: Single shot coherence properties of the free-electron laser SACLA in the hard X-ray regime.
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.
authors.affiliation: 1] Deutsches Elektronen Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany [2] The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: Felix
authors.initials: F
authors.lastname: Lehmkühler
authors.affiliation: 1] Deutsches Elektronen Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany [2] The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany [3].
authors.forename: Christian
authors.initials: C
authors.lastname: Gutt
authors.affiliation: 1] Deutsches Elektronen Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany [2] The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany [3].
authors.forename: Birgit
authors.initials: B
authors.lastname: Fischer
authors.affiliation: 1] Deutsches Elektronen Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany [2] The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: Martin A
authors.initials: MA
authors.lastname: Schroer
authors.affiliation: LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
authors.forename: Marcin
authors.initials: M
authors.lastname: Sikorski
authors.affiliation: LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
authors.forename: Sanghoon
authors.initials: S
authors.lastname: Song
authors.affiliation: Deutsches Elektronen Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Roseker
authors.affiliation: LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
authors.forename: James
authors.initials: J
authors.lastname: Glownia
authors.affiliation: LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Chollet
authors.affiliation: LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
authors.forename: Silke
authors.initials: S
authors.lastname: Nelson
authors.affiliation: Japan Synchrotron Radiation Research Institute, 1-1-1 Kuoto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan.
authors.forename: Kensuke
authors.initials: K
authors.lastname: Tono
authors.affiliation: Japan Synchrotron Radiation Research Institute, 1-1-1 Kuoto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan.
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Katayama
authors.affiliation: RIKEN SPring-8 Center, 1-1-1 Kuoto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan.
authors.forename: Makina
authors.initials: M
authors.lastname: Yabashi
authors.affiliation: RIKEN SPring-8 Center, 1-1-1 Kuoto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Ishikawa
authors.affiliation: Japan Synchrotron Radiation Research Institute, 1-1-1 Kuoto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan.
authors.forename: Aymeric
authors.initials: A
authors.lastname: Robert
authors.affiliation: 1] Deutsches Elektronen Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany [2] The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Grübel