Investigations of the high flux behavior of CdTe-Medipix2 assemblies at the synchrotron ANKA

CdTe is a promising sensor material for the detection of γ-Rays and X-Rays as it offers an absorption efficiency higher than 50 % for photon energies up to 120 keV for 1 mm thick sensors. Connected to the pixilated, single-photon counting readout electronics Timepix, its application at a synchrotron source was investigated. The focus of the investigations was on the high flux behavior of the CdTe-Timepix assemblies, as CdTe is known to suffer from a degradation of the count-rates when being illuminated with high photon fluxes. Moreover, the high flux behavior of the readout electronics itself was investigated by measuring an assembly with a silicon sensor, which is not known to suffer from a degradation effect at high photon fluxes.