Providing a background discrimination tool is crucial for enhancing the sensitivity of next-generation experiments searching for neutrinoless double- beta decay. The development of high-sensitivity (< 20 eV RMS) cryogenic light detectors allows simultaneous read-out of the light and heat signals and enables background suppression through particle identification. The Cryogenic wide- Area Light Detector with Excellent Resolution (CALDER) R&D already proved the potential of this technique using the phonon-mediated Kinetic Inductance Detectors (KIDs) approach. The first array prototype with 4 Aluminum KIDs on a 2 × 2 cm2 Silicon substrate showed a baseline resolution of 154 ± 7 eV RMS. Improving the design and the readout of the resonator, the next CALDER prototype featured an energy resolution of 82 ± 4 eV, by sampling the same substrate with a single Aluminum KID.
@article{arxiv.1705.04483,
title = {High-sensitivity Kinetic Inductance Detectors for CALDER},
author = {A. D'Addabbo and F. Bellini and L. Cardani and N. Casali and M. G. Castellano and I. Colantoni and C. Cosmelli and A. Cruciani and S. Di Domizio and M. Martinez and C. Tomei and M. Vignati},
journal= {arXiv preprint arXiv:1705.04483},
year = {2017}
}