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Article Dans Une Revue Review of Scientific Instruments Année : 2009

Chopper system for time resolved experiments with synchrotron radiation

Résumé

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 μs) 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.
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Dates et versions

hal-00665262 , version 1 (01-02-2012)

Identifiants

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Marco Cammarata, Laurent Eybert, Friederike Ewald, Wolfgang Reichenbach, Michaël Wulff, et al.. Chopper system for time resolved experiments with synchrotron radiation. Review of Scientific Instruments, 2009, 80 (1), pp.5101. ⟨10.1063/1.3036983⟩. ⟨hal-00665262⟩
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