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Time-resolved x-ray photoelectron spectroscopy at FLASH

  • S. Hellmann
  • C. Sohrt
  • M. Beye
  • T. Rohwer
  • F. Sorgenfrei
  • M. Marczynski-Buehlow
  • M. Kallaene
  • H. Redlin
  • Franz Hennies
  • M. Bauer
  • A. Foehlisch
  • L. Kipp
  • W. Wurth
  • K. Rossnagel
Publiceringsår: 2012
Språk: Engelska
Publikation/Tidskrift/Serie: New Journal of Physics
Volym: 14
Dokumenttyp: Artikel i tidskrift
Förlag: IOP Publishing Ltd.


The technique of time-resolved pump-probe x-ray photoelectron spectroscopy using the free-electron laser in Hamburg (FLASH) is described in detail. Particular foci lie on the macrobunch resolving detection scheme, the role of vacuum space-charge effects and the synchronization of pump and probe lasers. In an exemplary case study, the complete Ta 4f core-level dynamics in the layered charge-density-wave (CDW) compound 1T-TaS2 in response to impulsive optical excitation is measured on the sub-picosecond to nanosecond timescale. The observed multi-component dynamics is related to the intrinsic melting and reformation of the CDW as well as to extrinsic pump-laser-induced vacuum space-charge effects.


  • Natural Sciences
  • Physical Sciences


  • ISSN: 1367-2630

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