SiPM proton irradiation for application in cosmic space

21 Mar 2020  ·  Mianowski S., Borowicz D. M., Brylew K., Dziedzic A., Grodzicka-Kobylka M., Korgul A., Krakowiak M., Mianowska Z., Molokanov A. G., Moszynski M., Mytsin G. V., Rybka D., Shipulin K., Szczesniak T. ·

This paper presents the results of the proton irradiation of silicon photomulipliers (SiPMs) by mono-energetic 170 MeV protons with fluence up to 4.6$\times$10$^{9}$ particles/cm$^2$. In our work, three types of silicon photodetectors from Hamamatsu with areas 3$\times$3 mm$^2$ and different subpixel sizes of 25$\times$25 $\mu$m$^2$, 50$\times$50 $\mu$m$^2$, and 75$\times$75 $\mu$m$^2$ were used. The changes in the SiPM dark count rate (DCR) spectrum before and after irradiation in temperatures in the range of 20 $^\circ$C to -65 $^\circ$C are presented. The influence of the DCR changes on the energy resolution of the 662 keV gamma line from the $^{137}$Cs for a non-irradiated GAGG:Ce (1$\%$) scintillator is investigated. The time period of usability of the SiPM detector irradiated by protons in cosmic space was estimated.

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Instrumentation and Detectors High Energy Physics - Experiment