Speakers
Description
Next generation neutrinoless double beta decay experiments aim to search for lepton number violation and the origin of neutrino mass through ton-scale experiments with ever more demanding background targets. In order to cover neutrino masses in the inverted hierarchy region, half-life sensitivities equal to or greater than 10$^{27}$ years are required. The CUPID experiment is one of the leading next generation projects in the field. It will exploit an array of 1596 cryogenic calorimeters to search for neutrinoless double beta decay of $^{100}$Mo at the LNGS laboratory. To reach this target sensitivity the understanding and control of the backgrounds at a total level of 10$^{-4}$ counts/keV/kg/yr is a key requirement. In this talk we will summarise the background sources relevant to the CUPID experiment and their correspondance to radioactive contaminations as established through detailed Geant4 MC simulations. We will present an estimation of each of the sources, subsequent radio-purity and screening requirements and a preliminary view of the CUPID asssembly strategy to prevent or minimise re-contamination.