The results of studying a calorimeter cell in the low-energy region, ~50 MeV, which consists of a LYSO crystal and two avalanche photodiodes, are presented. The use of two photodiodes per crystal made it possible to perform a preliminary measurement of the calorimeter energy resolution using one calorimeter cell and cosmic muons. The coefficient of the stochastic contribution to the calorimeter energy resolution and the crystal luminescence time were measured (0.115% and 50 ns, respectively).
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R. Djilkibaev (2017) studied this question.
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