Detectors for calibration measurements in CRESST

The CRESST (=Cryogenic Rare Event Search with Superconducting Thermometers) experiment searches for dark matter particles (Weakly Interacting Massive Particles, WIMPs) via nuclear scattering using cryogenic detectors. The simultaneous measurement of the phonon signal and the scintillation light from the target CaWO4 crystal allows to veto effectively background from βs and γs due to the different light output for electron and nuclear recoils. At the TU Muenchen we are performing calibration measurements for the better understanding of the detector response to various event types (e.g. neutrons scattering on different nuclei). For this purpose we are developing a special version of the CRESST detector optimized for higher count rates. These detectors consist of a smaller CaWO4 crystal (10-38 g instead of 300 g) together with a cryogenic light detector, both equipped with Ir/Au transition edge sensors. We will report on the latest results of these developments. (orig.)