The 20th International Conference on Low Temperature Detectors (LTD20)
Presentation Code : T-2-2
Presentation Schedule: : July 25, 10:45 ~ 11:00

COSINUS - TES-instrumented NaI crystals for direct dark matter search 
 

Martin Stahlberg1, The COSINUS Collaboration1,2,3,4,5,6,7,8,9
1Max Planck Institute for Physics, Germany, 2Atominstitut, Technische Universität Wien, Austria, 3Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell'Aquila, Italy, 4Gran Sasso Science Institute, Italy, 5Helsinki Institute of Physics, Finland, 6INFN - Laboratori Nazionali del Gran Sasso, Italy, 7INFN - Sezione di Roma, Italy, 8Institut für Hochenergiephysik der Österreichischen Akademie der Wissenschaften, Austria, 9SICCAS - Shanghai Institute of Ceramics, China

Construction of the COSINUS (Cryogenic Observatory for SIgnals seen in Next generation Underground Searches) setup at Laboratori Nazionali del Gran Sasso in Italy is nearing completion. With its cryogenically operated NaI calorimeters, COSINUS will investigate the origin of the signal reported by the DAMA/LIBRA collaboration since decades. To this end, COSINUS detectors feature an additional light readout channel enabling event-by-event discrimination of nuclear recoils and electromagnetic background. In this contribution, we will report on the status of the experiment, as well as results from a recent COSINUS detector prototype measurement, where a nuclear recoil energy threshold of 2keV was reached with the novel remoTES design. In this design, the TES sensor is not directly attached to the NaI target crystal, but instead connected to it via a Au link and pad, enabling the use of NaI with TES sensors despite the hygroscopicity of the material. Using a dry dilution refrigerator, COSINUS will collect 100kgd of exposure in the first measurement phase beginning in 2024, providing a definitive crosscheck of the DAMA/LIBRA event rate in a nearly background-free measurement.

• Presentation Preference : Oral
• Topic : D. Applications
- 07. Particle dark matter, Neutrinos, Rare events
• Corresponding Author : Martin Stahlberg (Max Planck Institute for Physics, Munich)
• Presenter : Martin Stahlberg (Max Planck Institute for Physics, Munich)