High precision scintillator time profile measurements using an LAPPD

Liquid scintillators have seen consistent use in nuclear and particle physics over several decades, with new mixtures still being developed today. In the context of large-scale neutrino detectors, accurate knowledge of the emission time profile of the scintillator cocktail is necessary for robust vertex reconstruction, and the potential for direction reconstruction via timing-based selection of Cherenkov photons is directly correlated with the scintillator rise-time. We present a single-photon method for measuring the time profiles of organic liquid scintillators which is robust to the light yield of the sample, where an LAPPD provides enhanced sensitivity to the rise-time, and report implications for timing-based particle-identification in water-based liquid scintillator based on measurements made using the CHESS apparatus at LBNL.