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Selecting Pulses with Jülich's High-Precision Light Chopper

19 May 2015 – A team of scientists and engineers from Forschungszentrum Jülich, the Max Planck Institute for Microstructure Physics in Halle, and Helmholtz-Zentrum Berlin (HZB) have developed a megahertz light chopper for the BESSY II electron storage ring at HZB which functions as a high-precision X-ray filter. The instrument enables researchers to specifically select one of 400 X-ray flashes at BESSY II and use it for their experiments, particularly in the field of materials research. In this way, they can, for example, investigate highly sensitive organic samples at high resolution and perform time-resolved experiments in order to observe physical, chemical, or biological processes. Without the light chopper, the operation of the entire synchrotron would have to be reconfigured for such measurements, which would place considerable restrictions on most of the other experiments at the approximately 50 measuring stations and would therefore be unacceptable for long-term operation.

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