Change of SiPM parameters after very high neutron irradiation

Recently developed high dynamic range Hamamatsu and FBK SiPMs were irradiated with reactor neutrons at JSI (Ljubljana) up to 2× 1014 n/cm2 (1 MeV equivalent). Parameters of the irradiated SiPMs were studied using pulsed light illumination. In this presentation we report about change in the SiPMs PDE, gain, dark current, noise and breakdown voltage after irradiation.