An Updated Simulation of the Booster Neutrino Beam

The geometry of the G4BNB simulation was imported from the original MiniBooNE simulation, and includes a Beryllium target, focusing horn, decay region and beam stop.In order to ensure the accuracy of this modelling, a survey of the BNB site is planned for the 2024-25 beam shut down.The predicted flux of G4BNB at SBND is presented below.In order to compare to the previous simulation, the MiniBooNE flux predictions were rescaled to the size and distance of SBND.The updated kaon decay parameters [2,3] have also been added as weightings to both.