ИСТИНА

The experimental foundation of modern neutrino astronomy is designing and scaling of neutrino telescopes which are typically arrays of optical detectors placed in a natural transparent medium (water, ice). The prominent representatives of neutrino telescopes are the IceCube at the South Pole, KM3NeT in the Mediterranean Sea and Baikal-GVD in Lake Baikal. For successful analyses of experimental data and verification of theoretical models, as well as for evaluating detection of neutrino-induced events, it is necessary to use precise simulation of physical processes that occur in the detector. The NTSim software package (Neutrino Telescope Simulation) for designing neutrino telescopes serves this purpose. Among other similar toolkits, NTSim stands out due to the following underlying principles. First, NTSim is written using the Python programming language, including the central core of the simulation – a pythonized shell for the Geant4 package, a toolkit for the simulation of the passage of particles through matter. Second, the modular principle allows the user to design neutrino telescopes and calculate responses resulting from generation of neutrino-induced events. Third, a balance is achieved between the rate of modelling and the accuracy of reproducing physical processes, for instance, such as generation and propagation of hadron and electromagnetic cascades. All this allows NTSim to be a convenient and efficient toolkit for developing existing and designing future neutrino telescopes, as well as for reconstructing neutrino-induced events.