Dresden 2006 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

TT: Tiefe Temperaturen

TT 24: Superconductivity: Cryodetectors

TT 24.2: Vortrag

Mittwoch, 29. März 2006, 17:00–17:15, HSZ 02

Detector Development for Calibration Measurements in CRESST — •Wolfgang Westphal, Chiara Coppi, Franz von Feilitzsch, Christian Isaila, Jean-Côme Lanfranchi, Sebastian Pfister, Walter Potzel, Wolfgang Rau, Michael Stark, and Doreen Wernicke — Physik Department E15, Technische Universität München, James-Franck-Straße, D-85748 Garching

In the CRESST experiment the simultaneous measurement of the heat signal and the scintillation light from events in CaWO₄ is used to discriminate the background electron recoil events from nuclear recoil events. The detectors consist of CaWO₄ crystals equipped with transition edge sensors (TES) for the measurement of the heat signal and a light detector made of silicon, also equipped with a TES. The two detector parts are mounted together in a reflective housing for improved light collection. A potentially harmful background in CRESST are recoiling nuclei from surface alpha decays. At the TU München we are performing calibration measurements to characterize that background. For this purpose we are developing modified detectors capable of measuring the expected higher count rates in these experiments.