title: Towards simultaneous measurements of electronic and structural properties in ultra-fast x-ray free electron laser absorption spectroscopy experiments.
abstract: The rapidly growing ultrafast science with X-ray lasers unveils atomic scale processes with unprecedented time resolution bringing the so called "molecular movie" within reach. X-ray absorption spectroscopy is one of the most powerful x-ray techniques providing both local atomic order and electronic structure when coupled with ad-hoc theory. Collecting absorption spectra within few x-ray pulses is possible only in a dispersive setup. We demonstrate ultrafast time-resolved measurements of the LIII-edge x-ray absorption near-edge spectra of irreversibly laser excited Molybdenum using an average of only few x-ray pulses with a signal to noise ratio limited only by the saturation level of the detector. The simplicity of the experimental set-up makes this technique versatile and applicable for a wide range of pump-probe experiments, particularly in the case of non-reversible processes.
authors.affiliation: 1] Univ. Bordeaux, CEA, CNRS, CELIA, Talence, France [2] Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea.
authors.forename: J
authors.initials: J
authors.lastname: Gaudin
authors.affiliation: Univ. Bordeaux, CEA, CNRS, CELIA, Talence, France.
authors.forename: C
authors.initials: C
authors.lastname: Fourment
authors.affiliation: Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea.
authors.forename: B I
authors.initials: BI
authors.lastname: Cho
authors.affiliation: Lawrence Berkeley National Laboratory, Berkeley, USA.
authors.forename: K
authors.initials: K
authors.lastname: Engelhorn
authors.affiliation: SLAC National Accelerator Laboratory, Menlo Park, USA.
authors.forename: E
authors.initials: E
authors.lastname: Galtier
authors.affiliation: 1] DESY, Hamburg, Germany [2] Laboratoire pour l'Utilisation des Lasers Intenses, Palaiseau, France.
authors.forename: M
authors.initials: M
authors.lastname: Harmand
authors.affiliation: Univ. Bordeaux, CEA, CNRS, CELIA, Talence, France.
authors.forename: P M
authors.initials: PM
authors.lastname: Leguay
authors.affiliation: SLAC National Accelerator Laboratory, Menlo Park, USA.
authors.forename: H J
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: SLAC National Accelerator Laboratory, Menlo Park, USA.
authors.forename: B
authors.initials: B
authors.lastname: Nagler
authors.affiliation: European XFEL, Hamburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Nakatsutsumi
authors.affiliation: European XFEL, Hamburg, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Ozkan
authors.affiliation: Helmholtz Zentrum Geesthacht, Geesthacht, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Störmer
authors.affiliation: DESY, Hamburg, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Toleikis
authors.affiliation: European XFEL, Hamburg, Germany.
authors.forename: Th
authors.initials: T
authors.lastname: Tschentscher
authors.affiliation: SLAC National Accelerator Laboratory, Menlo Park, USA.
authors.forename: P A
authors.initials: PA
authors.lastname: Heimann
authors.affiliation: Univ. Bordeaux, CEA, CNRS, CELIA, Talence, France.
authors.forename: F
authors.initials: F
authors.lastname: Dorchies
mesh_terms: D000042:Absorption; D004583:Electrons; D007834:Lasers; D008027:Light; D008982:Molybdenum / Q000737:chemistry; D056928:X-Ray Absorption Spectroscopy
chemical_list: D008982:Molybdenum
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