A low-threshold diamond cryogenic detector for sub-GeV dark matter searches

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2022-09, Vol.82 (9), p.1-5, Article 851
• Main Authors: Abdelhameed, A. H., Angloher, G., Bento, A., Bertoldo, E., Bertolini, A., Canonica, L., Iachellini, N. Ferreiro, Fuchs, D., Garai, A., Hauff, D., Nilima, A., Mancuso, M., Petricca, F., Pröbst, F., Pucci, F., Rothe, J.
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Chemical vapor deposition; Coherent scattering; Dark matter; Dark matter (Astronomy); Diamonds; Elementary Particles; Energy; Energy resolution; Experiments; Hadrons; Heavy Ions; Kinematics; Letter; Light; Measurement Science and Instrumentation; Neutrinos; Nuclear Energy; Nuclear Physics; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Searching; Sensors; String Theory
• ISSN: 1434-6052; 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-022-10829-5

In this work we report the realization of the first low-threshold cryogenic detector that uses diamond as absorber for astroparticle physics applications. We tested two 0.175 g CVD diamond samples, each instrumented with a W-TES. The sensors showed transitions at about 25 mK. We present the performance of the diamond detectors and we highlight the best performing one, where we obtained an energy threshold as low as 16.8 eV. This promising result lays the foundation for the use of diamond for different fields of applications where low threshold and excellent energy resolution are required, as i.e. light dark matter searches and BSM physics with coherent elastic neutrino nucleus scattering.