High precision scintillator time profile measurements using an LAPPD
ORAL
Abstract
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.
*This work was performed under the auspices of the U.S. Department of Energy by Lawrence Berkeley National Laboratory under Contract DE-AC02-05CH11231. The project was funded by the U.S. Department of Energy, National Nuclear Security Administration, Office of Defense Nuclear Nonproliferation Research and Development (DNN R&D). This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Award Number DE-SC0018974.
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Publication:``Cherenkov and scintillation separation in Water-based Liquid Scintillator using an LAPPD,'' available at arXiv:2110.13222 and submitted to European Physics Journal C. A publication containing measurements of alpha time profiles and implications for particle-identification is planned.
