Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 615, Issue 1, Pages 114-126Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2009.12.078
Keywords
Time-resolved dynamics; Ultrashort laser pulses; Core-level spectrocopy; High-order harmonic generation
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Funding
- Danish Council for Independent Research-Natural Sciences (FNU)
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A setup for femtosecond time-resolved photoelectron spectroscopy of solid surfaces is presented. The photon energies for core-level spectroscopy experiments are created by high-order harmonic generation from infrared 120-femtosecond laser pulses focused in a Ne gas jet. The present experimental realization allows the sample, located in an ultrahigh-vacuum chamber, to be illuminated by similar to 10(6) 65-eV photons per laser pulse at a 10 Hz repetition rate. The spectral width of a single harmonic is 0.77 eV (FWHM), and a few harmonics are selected by specially designed MO/Si multi-layer mirrors. Photoelectrons from the sample are collected by a large-solid-angle time-of-flight electron spectrometer based on a parabolic-grid reflector. Results from experiments probing the Bi 5d core-levels are presented, and the results of preliminary pump-probe experiments are described. (C) 2010 Elsevier B.V. All rights reserved.
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