Gamma-ray and Neutron Induced Photocurrent and Readout Noise in LYSO+SiPM Packages

Lu2(1–x)Y2xSiO5 (LYSO) crystals readout by a silicon photomultiplier (SiPM) will be used in the barrel timing layer of a precision timing detector for the Compact Muon Solenoid (CMS) experiment at the High-Luminosity Large Hadron Collider (HL-LHC). This detector is expected to be exposed up to 5-Mrad $\gamma $ -ray dose, $2.5\times 10^{13}$ charged hadrons/cm2, and $3\times 10^{14}\,\,\text{n}...