Chopper system for time resolved experiments with synchrotron radiation.
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 micros) 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.
Cammarata
Marco
M
European Synchrotron Radiation Facility, BP 220, Grenoble Cedex 38043, France.
Eybert
Laurent
L
Ewald
Friederike
F
Reichenbach
Wolfgang
W
Wulff
Michael
M
Anfinrud
Philip
P
Schotte
Friedrich
F
Plech
Anton
A
Kong
Qingyu
Q
Lorenc
Maciej
M
Lindenau
Bernd
B
Räbiger
Jürgen
J
Polachowski
Stephan
S
D007834:Lasers; D017356:Synchrotrons / Q000295:instrumentation*; D014965:X-Rays