In this paper we present the time resolution measurements of the Lutetium-Yttrium Oxyorthosilicate (LYSO) calorimeter prototype for the Mu2e experiment. The measurements have been performed using the e− beam of the Beam Test Facility (BTF) in Frascati, Italy in the energy range from 100 to 400 MeV. The calorimeter prototype consisted of twenty five 30x30x130 mm3, LYSO crystals read out by 10x10 mm2 Hamamatsu Avalanche Photodiodes (APDs). The energy dependence of the measured time resolution can be parametrized as σt(E)=a/E/GeV⊕b, with the stochastic and constant terms a=(51±1) ps and b=(10±4) ps, respectively. This corresponds to the time resolution of (162±4) ps at 100 MeV.
@article{arxiv.1509.04468,
title = {Measurement of time resolution of the Mu2e LYSO calorimeter prototype},
author = {N. Atanov and V. Baranov and F. Colao and M. Cordelli and G. Corradi and E. Dané and Yu. I. Davydov and K. Flood and S. Giovannella and V. Glagolev and F. Happacher and D. G. Hitlin and M. Martini and S. Miscetti and T. Miyashita and L. Morescalchi and G. Pezzullo and A. Saputi and I. Sarra and S. R. Soleti and G. Tassielli and V. Tereshchenko},
journal= {arXiv preprint arXiv:1509.04468},
year = {2016}
}
Comments
18 pages, 14 figures, accepted for the journal Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment