Abstract
Large-mass arrays of bolometers proved to be good detectors for Neutrinoless Double Beta Decay (0νββ) and Dark Matter searches. CUORE and LUCIFER are bolometric 0νββ experiments which will start to take data in 2016 at Laboratori Nazionali del Gran Sasso in Italy. The sensitivity of CUORE could be increased by removing the background due to α particles, by detecting the small amount of Cherenkov light (100eV) emitted by the βs׳ signal and not by αs. LUCIFER could be extended to detect also Dark Matter, provided that the background from β/γ particles (100eV of scintillation light) is discriminated from nuclear recoils of about 10keV energy (no light). CALDER is a project to develop light detectors for CUORE, LUCIFER and similar bolometric experiments. The goal is to obtain detectors with an active area of 5×5cm2 (the face of bolometric crystals), operating at 10mK, and with a baseline resolution better than 20eV. We have chosen to develop phonon-mediated devices using Kinetic Inductance Detectors (KIDs). We present the first results and the perspectives of the project.
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