Time-resolved x-ray photoelectron spectroscopy at FLASH

Details Time-resolved x-ray photoelectron spectroscopy at FLASH Time-resolved x-ray photoelectron spectroscopy at FLASH

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012njph...14a3062h&link_type=abstract

New Journal of Physics, Volume 14, Issue 1, pp. 013062 (2012).

Physics

Scientific paper

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.

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