Proton irradiation of SiPM arrays for POLAR-2

• DOI: 10.1007/s10686-022-09873-6
• Publication Date: 2022-10-25T16:02:40Z
• Authors: Slawomir Mianowski; Nicolas De Angelis; Johannes Hulsman; Merlin Kole; Tomasz Kowalski; Sebastian Kusyk; Hancheng Li; Zuzanna Mianowska; Jerzy Mietelski; Agnieszka Pollo; Dominik Rybka; Jianchao Sun; Jan Swakon; Damian Wrobel; Xin Wu
• Keywords: Silicon Photomultiplier; South Atlantic Anomaly

POLAR-2 is a space-borne polarimeter, built to investigate the polarization of Gamma-Ray Bursts and help elucidate their mechanisms. The instrument targeted for launch in 2024 or 2025 aboard China Space Station being developed by collaboration between institutes from Switzerland, Germany, Poland China. will orbit at altitudes 340km 450km with an inclination 42∘ be subjected background radiation cosmic rays solar events. It therefore pertinent better understand performance sensitive devices under space-like conditions. In this paper we focus on damage silicon photomultiplier arrays S13361-6075NE-04 S14161-6050HS-04 Hamamatsu. S13361 are irradiated 58MeV protons several doses up 4.96Gy, whereas newer series S14161 0.254Gy 2.31Gy. Their respective degradation due discussed. equivalent exposure time space photomultipliers inside dose 4.96Gy 62.9years (or 1.78years when disregarding shielding instrument). Primary characteristics I-V curves increase dark current counts, mostly through cross-talk Annealing processes 25∘C were observed but not studied further detail. Biasing channels while have resulted any significant impact. Activation analyses showed dominant contribution β+ particles around 511 keV. These primarily copper carbon, decay times shorter than orbital period.