Simulation of the Antineutrino Detector for the Second Neutrino Laboratory at the SM-3 Reactor

An experiment aimed at searching for a sterile neutrino using a new detector of the second neutrino laboratory at the SM-3 reactor (Dimitrovgrad, Russia) has been simulated. This detector is a scintillation detector of reactor antineutrinos with a multisection structure and horizontal arrangement of sections. Distributions of counts from prompt and delayed signals, as well as the dependence of detector efficiency on the selected thresholds, have been obtained by simulation. The antineutrino flux has been simulated with an allowance for the dimensions of the reactor core and its spatial location with respect to the detector. This simulation has been used as a basis to calculate the effect that should be obtained by measurements for the specified parameters of oscillations and energy resolution of the detector.