Speaker
Description
The $\nu$GeN experiment searches for coherent elastic neutrino-nucleus scattering (CE$\nu$NS) at the Kalinin Nuclear Power Plant. To reduce background conditions, an upgrade in the form of an active anti-coincidence system based on NaI crystals is proposed. It will cover the low-threshold 1.41 kg high-purity germanium detector from all sides and suppress different backgrounds. This work presents a simulation of the main background sources (internal contamination of NaI by 40K, 238U, 232Th; surface contamination of the passive copper shield by 137Cs; 222Rn in nylon) for the new setup configuration using Geant4 with the Shielding_EMZ physics list. The simulated energy spectra for 40K, 238U, 232Th, 137Cs, and 222Rn, both with and without the application of the anti-coincidence veto, will be presented and discussed.
