The COSINUS experiment aims for probing the nature of the long-standing annual modulation signal observed by the DAMA/LIBRA collaboration. After successful years of detector prototyping, the construction of a dedicated experimental facility will start this year in Hall B of the LNGS underground laboratory. At the heart of the setup, NaI crystals – the same material as used in DAMA/LIBRA – will be operated as scintillating cryogenic calorimeters.
To reach the necessary sensitivity to potential signals, background mitigation is of utmost importance. Besides using radiopure crystals and going underground, this can be achieved by surrounding the detectors with dedicated passive (and active) shielding layers. To optimize these layers and hence minimize background contributions from environmental radioactivity as well as intrinsic contamination of materials used for cryostat, shielding and infrastructure, we performed detailed Monte Carlo simulations.
In this contribution, we will present the results of our simulation studies together with the final design of the COSINUS experimental setup.
|Reference to paper (DOI or arXiv)