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

M. Dell'Angela; T. Anniyev; M. Beye; R. Coffee; A. Föhlisch; J. Gladh; S. Kaya; T. Katayama; O. Krupin; A. Nilsson; D. Nordlund; W. F. Schlotter; J. A. Sellberg; F. Sorgenfrei; J. J. Turner; H. Öström; H. Ogasawara; M. Wolf; W. Wurth

doi:10.1063/1.4914892

Structural Dynamics (Mar 2015)

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

M. Dell'Angela,
T. Anniyev,
M. Beye,
R. Coffee,
A. Föhlisch,
J. Gladh,
S. Kaya,
T. Katayama,
O. Krupin,
A. Nilsson,
D. Nordlund,
W. F. Schlotter,
J. A. Sellberg,
F. Sorgenfrei,
J. J. Turner,
H. Öström,
H. Ogasawara,
M. Wolf,
W. Wurth

Affiliations

M. Dell'Angela: Physics Department and Center for Free-Electron Laser Science, Universität Hamburg, 22607 Hamburg, Germany
T. Anniyev: SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
M. Beye: SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
R. Coffee: LCLS, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
A. Föhlisch: Institute for Methods and Instrumentation in Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Wilhelm-Conrad-Röntgen Campus, Albert-Einstein-Str. 15, 12489 Berlin, Germany
J. Gladh: Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden
S. Kaya: SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
T. Katayama: SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
O. Krupin: Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
A. Nilsson: Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden
D. Nordlund: SSRL, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
W. F. Schlotter: Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
J. A. Sellberg: SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
F. Sorgenfrei: Physics Department and Center for Free-Electron Laser Science, Universität Hamburg, 22607 Hamburg, Germany
J. J. Turner: Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
H. Öström: Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden
H. Ogasawara: SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
M. Wolf: Fritz-Haber Institute, Max Planck Society, Faradayweg 4-6, D-14195 Berlin, Germany
W. Wurth: Physics Department and Center for Free-Electron Laser Science, Universität Hamburg, 22607 Hamburg, Germany

DOI: https://doi.org/10.1063/1.4914892
Journal volume & issue: Vol. 2, no. 2
pp. 025101 – 025101-10

Abstract

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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.

Published in Structural Dynamics

ISSN: 2329-7778 (Online)
Publisher: AIP Publishing LLC and ACA
Country of publisher: United States
LCC subjects: Science: Chemistry: Crystallography
Website: http://sd.aip.org

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