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Title: Towards simultaneous measurements of electronic and structural properties in ultra-fast x-ray free electron laser absorption spectroscopy experiments

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:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [2] ;  [5] ;  [5] ;  [7] ;  [7] ;  [8] ;  [9] ;  [7] ;  [5] ;  [2]
  1. Univ. Bordeaux, Talence (France); Gwangju Inst. of Science and Technology, Gwangju (Korea, Republic of)
  2. Univ. Bordeaux, Talence (France)
  3. Gwangju Inst. of Science and Technology, Gwangju (Korea, Republic of)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. SLAC National Accelerator Laboratory, Menlo Park, CA (United States)
  6. DESY, Hamburg (Germany); Lab. pour l’Utilisation des Lasers Intenses, Palaiseau (France)
  7. European XFEL, Hamburg (Germany)
  8. Helmholtz Zentrum Geesthacht, Geesthacht (Germany)
  9. DESY, Hamburg (Germany)
Publication Date:
OSTI Identifier:
1187991
Grant/Contract Number:
SF00515
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 4; Journal Issue: 96; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS