Status of the CALDER project: Cryogenic light detectors for background suppression

N. Casali , F. Bellini , M. Calvo (1) , L. Cardani , M.G. Castellano , C. Cosmelli , A. Cruciani , S. Di Domizio , P. Fresch , J. Goupy (2) , M. Martinez , A. Monfardini (3) , G. Pettinari , H. Le Sueur (2) , M. Vignati

1 NEEL - Cryo - Cryogénie
2 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
3 NEEL - HELFA - Hélium : du fondamental aux applications

The development of large area cryogenic light detectors is one of the priorities of next generation bolometric experiments searching for neutrinoless double beta decay. The simultaneous read-out of the heat and light signals enables particle identification, provided that the energy resolution and the light collection are sufficiently high. CALDER (Cryogenic wide-Area Light Detectors with Excellent Resolution) is developing phonon-mediated silicon light detectors using KIDs, with the goal of sensing an area of 5 × 5 cm 2 with a resolution of 20 eV RMS. We present the latest results obtained with aluminum chips and with newly developed multi-layer titanium–aluminum chips featuring a remarkable sensitivity.

Mots clés: Kinetic inductance detectors; Phonon-mediated light detectors; Rare events searches; Superconducting device; double-beta decay: (0neutrino); energy resolution; sensitivity; cryogenics; bolometer; photon: detector; aluminum; silicon; particle identification; titanium; detector: design

Domaines: Instrumentations et Détecteurs [physics.ins-det]

N. Casali, F. Bellini, M. Calvo, L. Cardani, M.G. Castellano, et al.. Status of the CALDER project: Cryogenic light detectors for background suppression. 14th Pisa Meeting on Advanced Detectors, May 2018, La Biodola-Isola d'Elba, Italy. pp.166-168, ⟨10.1016/j.nima.2018.10.079⟩. ⟨hal-02188874⟩