Compact X-rays detectors made of 1/2" or 1" :LaBr3:Ce crystals of cubic shape with SiPM array readout have been developed for the FAMU experiment at RIKEN-RAL. The aim is a precise measurement of the proton Zemach radius with incoming muons. Additional applications may be found in medical physics, such as PET, homeland security and gamma-ray astronomy. Due to the high photon yield of LaBr3:Ce it was possible to use a simple readout scheme based on CAEN V1730 digitizers. Detectors, using Hamamatsu S13361 or S14161 arrays, have good FWHM energy resolutions up to 3 % (8 %) at the Cs137 Co57) peak, comparing well with the best results obtained with a photomultiplier's readout. Detailed studies were performed to correct online the drift with temperature of SiPM gain and to reduce the risetime/falltime of detectors' signals, that increased going from 1/2" to 1" detectors, due to the larger capacity of the used SiPM arrays.
@article{arxiv.2211.05081,
title = {Large area LaBr3:Ce crystals read by SiPM arrays with improved timing and temperature gain drift control},
author = {M. Bonesini and R. Benocci and R. Bertoni and A. Menegolli and M. Prata and M. Rossella and R. Rossini},
journal= {arXiv preprint arXiv:2211.05081},
year = {2022}
}
Comments
arXiv admin note: text overlap with arXiv:2210.02258