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

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Sammanfattning

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.
Originalspråkengelska
Artikelnummer013062
TidskriftNew Journal of Physics
Volym14
DOI
StatusPublished - 2012

Ämnesklassifikation (UKÄ)

  • Naturvetenskap
  • Fysik

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