Speaker
Description
DarkSide-20k will be a 50 tonne dual-phase LAr TPC for direct DM search, currently under construction at Hall C of LNGS. The simulation of backgrounds relies on a Geant4-based software package, G4DS, which was extensively developed in the context of the DarkSide-50 and is being used for all DarkSide-20k simulations as well as for several related experiments. G4DS provides a description of the response of argon to nuclear and electron recoils, as well as a simulation of the TPC optics tuned on DarkSide-50 data. We will discuss the status of the simulation and the latest developments for the modelling of neutron captures in Gd-PMMA that has been selected as a main construction material of the TPC. We will discuss, in addition, neutron propagation and cosmogenic backgrounds for DarkSide-20k.
