Time-resolved soft x-ray absorption setup using multi-bunch operation modes at synchrotrons

Here, we report on a novel experimental apparatus for performing time-resolved soft x-ray absorption spectroscopy in the sub-ns time scale using non-hybrid multi-bunch mode synchrotron radiation. The present setup is based on a variable repetition rate Ti:sapphire laser (pump pulse) synchronized wit...

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Bibliographic Details
Published in:Review of scientific instruments 2011-12, Vol.82 (12), p.123109-123109-6
Main Authors: Stebel, L., Malvestuto, M., Capogrosso, V., Sigalotti, P., Ressel, B., Bondino, F., Magnano, E., Cautero, G., Parmigiani, F.
Format: Article
Language:English
Subjects:
ABSORPTION
ABSORPTION SPECTROSCOPY
BEAM BUNCHING
GERMANIUM
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
LASERS
MELTING
MONOCRYSTALS
PARTICLE ACCELERATORS
PHOTONS
PULSES
SAPPHIRE
SOFT X RADIATION
SOLIDIFICATION
SYNCHROTRON RADIATION
SYNCHROTRONS
TIME RESOLUTION
X-RAY SPECTROSCOPY
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Summary:Here, we report on a novel experimental apparatus for performing time-resolved soft x-ray absorption spectroscopy in the sub-ns time scale using non-hybrid multi-bunch mode synchrotron radiation. The present setup is based on a variable repetition rate Ti:sapphire laser (pump pulse) synchronized with the ∼500 MHz x-ray synchrotron radiation bunches and on a detection system that discriminates and singles out the significant x-ray photon pulses by means of a custom made photon counting unit. The whole setup has been validated by measuring the time evolution of the L 3 absorption edge during the melting and the solidification of a Ge single crystal irradiated by an intense ultrafast laser pulse. These results pave the way for performing synchrotron time-resolved experiments in the sub-ns time domain with variable repetition rate exploiting the full flux of the synchrotron radiation.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.3669787