Neutron damage and recovery studies of SiPMs
SiPM lost its performance characteristics when exposed to hig dose of neutrons. However, the distinct hallmark of SiPMs, low dark count and excellent photon-number-resolving capability, can be recovered by thermal annealing. Several SiPMs from different vendors are characterized before and after exposure of up to 1010 neutron/cm2 dosage using a 14 MeV neutron generation source. Collectively, we established that the typical orders of magnitude increase in dark current upon neutron irradiation can be lowered substantially after processing them with a thermal annealing procedure, and single-photon detection are to some extent recovered. Moreover, we found no significant difference on neutron damaged behavior when SiPMs are irradiated at room or liquid nitrogen temperatures suggesting that there is no evidence of radiation hardening when SiPMs are operated in cryogenic temperatures.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- DOE Contract Number:
- SC0012704
- OSTI ID:
- 1488845
- Report Number(s):
- BNL-210809-2018-COPA
- Resource Relation:
- Conference: Nuclear Science Symposium and Medical Imaging Conference, Sydney Australia, 11/10/2018 - 11/17/2018
- Country of Publication:
- United States
- Language:
- English
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