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Single photon avalanche diodes (SPADs) have been recently studied as photodetectors for applications in space missions. In this presentation we report the results of radiation hardness test on large area SPAD (actual results refer to SPADs having 500 μm diameter). Dark counts rate as low as few kHz at −10 °C has been obtained for the 500 μm devices, before irradiation. We performed bulk damage and total dose radiation tests with protons and gamma-rays in order to evaluate their radiation hardness properties and their suitability for application in a Low Earth Orbit (LEO) space mission. With this aim SPAD devices have been irradiated using up to 20 krad total dose with gamma-rays and 5 krad with protons. The test performed show that large area SPADs are very sensitive to proton doses as low as 2×108 (1 MeV eq) n/cm2 with a significant increase in dark counts rate (DCR) as well as in the manifestation of …
Publication date: 
21 May 2013

Francesco Moscatelli, Martino Marisaldi, Piera Maccagnani, Claudio Labanti, Fabio Fuschino, Michela Prest, Alessandro Berra, Davide Bolognini, Massimo Ghioni, Ivan Rech, Angelo Gulinatti, Andrea Giudice, Georg Simmerle, Andrea Candelori, Serena Mattiazzo, Xiaoli Sun, John F Cavanaugh, Danilo Rubini

Biblio References: 
Volume: 711 Pages: 65-72
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment