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Liquid argon is being employed as a detector medium in neutrino physics andDark Matter searches. A recent push to expand the applications of scintillationlight in Liquid Argon Time Projection Chamber neutrino detectors hasnecessitated the development of advanced methods of simulating this light. Thepresently available methods tend to be prohibitively slow or imprecise due tothe combination of detector size and the amount of energy deposited by neutrinobeam interactions. In this work we present a semi-analytical model to predictthe quantity of argon scintillation light observed by a light detector with aprecision better than $10\%$, based only on the relative positions between thescintillation and light detector. We also provide a method to predict thedistribution of arrival times of these photons accounting for propagationeffects. Additionally, we present an equivalent model to predict the number ofphotons and their arrival times in the case of a wavelength-shifting,highly-reflective layer being present on the detector cathode. Our proposedmethod can be used to simulate light propagation in large-scale liquid argondetectors such as DUNE or SBND, and could also be applied to other detectormediums such as liquid xenon or xenon-doped liquid argon.

Predicting Transport Effects of Scintillation Light Signals in Large-Scale Liquid Argon Detectors