Monte Carlo simulation variance reduction techniques for photon transport in liquid xenon detectors

Monte Carlo simulations are a crucial tool for the analysis and prediction of various background components in liquid xenon (LXe) detectors. With improving shielding new experiments, simulation external backgrounds, such as induced by gamma rays from detector materials, gets more computationally expensive. We introduce validate an accelerated technique photon transport The method simulates photon-induced interactions within defined geometry energy range with high statistics while outside region interest not simulated directly but taken into account means probability weights. For backgrounds exemplary we achieve three orders magnitude acceleration compared to standard current ton-scale LXe dark matter experiment.