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Title: Vacuum space charge effects in sub-picosecond soft X-ray photoemission on a molecular adsorbate layer

Vacuum space charge-induced kinetic energy shifts of O 1s and Ru 3d core levels in femtosecond soft X-ray photoemission spectra (PES) have been studied at a free electron laser (FEL) for an oxygen layer on Ru(0001). We fully reproduced the measurements by simulating the in-vacuum expansion of the photoelectrons and demonstrate the space charge contribution of the high-order harmonics in the FEL beam. Employing the same analysis for 400 nm pump-X-ray probe PES, we can disentangle the delay dependent Ru 3d energy shifts into effects induced by space charge and by lattice heating from the femtosecond pump pulse.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] ;  [12] ;  [13] ;  [11] ;  [6] ;  [14] ;  [15] ;  [13]
  1. Univ. of Hamburg (Germany). Physics Dept., Center for Free-Electron Laser Science; Elettra-Sincrotrone Trieste, Trieste (Italy)
  2. SLAC National Accelerator Laboratory, Menlo Park, CA (United States).SUNCAT Center for Interface Science and Catalysis.
  3. SLAC National Accelerator Laboratory, Menlo Park, CA (United States).SUNCAT Center for Interface Science and Catalysis; Helmholtz-Zentrum Berlin fur Materialien und Energie, Berlin (Germany)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Helmholtz-Zentrum Berlin fur Materialien und Energie, Berlin (Germany); Universität Potsdam, (Germany). Institut für Physik und Astronomie.
  6. Stockholm University (Sweden). Department of Physics, AlbaNova University Center.
  7. SLAC National Accelerator Laboratory, Menlo Park, CA (United States). SUNCAT Center for Interface Science and Catalysis.
  8. SLAC National Accelerator Laboratory, Menlo Park, CA (United States). Linac Coherent Light Source; European XFEL, Hamburg (Germany)
  9. Stockholm Univ. (Sweden). Dept. of Physics, AlbaNova Univ. Center; SLAC National Accelerator Laboratory and SUNCAT Center for Interface Science and Catalysis, Menlo Park, CA (United States)
  10. SLAC National Accelerator Lab., Menlo Park, CA (United States). SSRL.
  11. SLAC National Accelerator Laboratory, Menlo Park, CA (United States). Linac Coherent Light Source.
  12. SLAC National Accelerator Laboratory, Menlo Park, CA (United States). SUNCAT Center for Interface Science and Catalysis; Stockholm Univ. (Sweden). Dept. of Physics, AlbaNova Univ. Center.
  13. Univ. of Hamburg (Germany). Physics Dept., Center for Free-Electron Laser Science.
  14. SUNCAT Center for Interface Science and Catalysis and SLAC National Accelerator, Menlo Park, CA (United States)
  15. Fritz-Haber Institute, Berlin (Germany). Max Planck Society.
Publication Date:
OSTI Identifier:
1190016
Type:
Accepted Manuscript
Journal Name:
Structural Dynamics
Additional Journal Information:
Journal Volume: 2; Journal Issue: 2; Journal ID: ISSN 2329-7778
Publisher:
American Crystallographic Association/AIP
Research Org:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS