Chopper system for time resolved experiments with synchrotron radiation
- European Synchrotron Radiation Facility, BP 220, Grenoble Cedex 38043 (France)
- Laboratory of Chemical Physics, National Institutes of Health, Bethesda, Maryland 20892-0520 (United States)
- Institute for Synchrotron Radiation (ISS), FZ Karlsruhe, Postfach 3640, D-76021 Karlsruhe (Germany)
- Synchrotron SOLEIL, Saint-Aubin, 91192 Gif-sur-Yvette (France)
- Groupe Matiere Condensee et Materiaux, Universite de Rennes 1, UMR6626 CNRS, 35042 Rennes Cedex (France)
- Central Technology Division (ZAT), Forschungszentrum Juelich GmbH, Leo-Brandt-Str., 52425 Juelich (Germany)
A chopper system for time resolved pump-probe experiments with x-ray beams from a synchrotron is described. The system has three parts: a water-cooled heatload chopper, a high-speed chopper, and a millisecond shutter. The chopper system, which is installed in beamline ID09B at the European Synchrotron Radiation Facility, provides short x-ray pulses for pump-probe experiments with ultrafast lasers. The chopper system can produce x-ray pulses as short as 200 ns in a continuous beam and repeat at frequencies from 0 to 3 kHz. For bunch filling patterns of the synchrotron with pulse separations greater than 100 ns, the high-speed chopper can isolate single 100 ps x-ray pulses that are used for the highest time resolution. A new rotor in the high-speed chopper is presented with a single pulse (100 ps) and long pulse (10 {mu}s) option. In white beam experiments, the heatload of the (noncooled) high-speed chopper is lowered by a heatload chopper, which absorbs 95% of the incoming power without affecting the pulses selected by the high speed chopper.
- OSTI ID:
- 21266740
- Journal Information:
- Review of Scientific Instruments, Vol. 80, Issue 1; Other Information: DOI: 10.1063/1.3036983; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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