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Abstract
The COSINUS (Cryogenic Observatory for SIgnals seen in Next-generation Underground Searches) project aims to provide a model independent cross-check of the long-standing DAMA/LIBRA claim on the observation of dark matter, by using the same target material (NaI) with a different experimental approach. The use of sodium iodide (NaI) crystals, operated at cryogenic temperature as scintillating calorimeters, provides both a low energy threshold for nuclear recoil events as expected from dark matter particle interactions, and the possibility to perform particle discrimination. Indeed, the dual read-out of phonon and light allows to perform signal-to-background discrimination on an event-by-event basis, a unique feature in comparison to other NaI-based dark matter searches. In this paper we will discuss in detail the COSINUS detector concept and we will present the performances of our first prototypes together with the results of the first measurements.
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Details
1 INFN - Laboratori Nazionali del Gran Sasso, I-67010 Assergi - Italy
2 Max-Planck-Institut für Physik, D-80805 München - Germany
3 INFN - Sezione di Milano Bicocca, I-20126 Milano - Italy; Dipartimento di Fisica, Università di Milano-Bicocca, I-20126 Milano - Italy
4 Gran Sasso Science Institute, I-67100 L’Aquila - Italy; INFN - Laboratori Nazionali del Gran Sasso, I-67010 Assergi - Italy
5 INFN - Sezione di Milano Bicocca, I-20126 Milano - Italy
6 Institut fuür Hochenergiephysik der OÖAW, A-1050 Wien - Austria; Atominstitut, Technical University Vienna, A-1020 Wien - Austria