A summary on an investigation of GAGG:Ce afterglow emission in the context of future space applications within the HERMES nanosatellite mission

Giuseppe Dilillo; Riccardo Campana; Nicola Zampa; Fabio Fuschino; Giovanni Pauletta; Irina Rashevskaya; Filippo Ambrosino; Marco Baruzzo; Diego Cauz; Daniela Cirrincione; Marco Citossi; Giovanni Della Casa; Benedetto Di Ruzza; Gábor Galgóczi; Claudio Labanti; Yuri Evangelista; Jakub Ripa; Andrea Vacchi; Francesco Tommasino; Enrico Verroi; Fabrizio Fiore

doi:10.1117/12.2561053

13 December 2020 A summary on an investigation of GAGG:Ce afterglow emission in the context of future space applications within the HERMES nanosatellite mission

Giuseppe Dilillo, Riccardo Campana, Nicola Zampa, Fabio Fuschino, Giovanni Pauletta, Irina Rashevskaya, Filippo Ambrosino, Marco Baruzzo, Diego Cauz, Daniela Cirrincione, Marco Citossi, Giovanni Della Casa, Benedetto Di Ruzza, Gábor Galgóczi, Claudio Labanti, Yuri Evangelista, Jakub Ripa, Andrea Vacchi, Francesco Tommasino, Enrico Verroi, Fabrizio Fiore

Author Affiliations +

Proceedings Volume 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray; 1144493 (2020) https://doi.org/10.1117/12.2561053
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

GAGG:Ce (Cerium-doped Gadolinium Aluminium Gallium Garnet) is a promising new scintillator crystal. A wide array of interesting features, such as high light output, fast decay times, almost non-existent intrinsic background and robustness, make GAGG:Ce an interesting candidate as a component of new space-based gamma-ray detectors. As a consequence of its novelty, literature on GAGG:Ce is still lacking on points crucial to its applicability in space missions. In particular, GAGG:Ce is characterized by unusually high and long-lasting delayed luminescence. This afterglow emission can be stimulated by the interactions between the scintillator and the particles of the near-Earth radiation environment. By contributing to the noise, it will impact the detector performance to some degree. In this manuscript we summarize the results of an irradiation campaign of GAGG:Ce crystals with protons, conducted in the framework of the HERMES-TP/SP (High Energy Rapid Modular Ensemble of Satellites - Technological and Scientific Pathfinder) mission. A GAGG:Ce sample was irradiated with 70 MeV protons, at doses equivalent to those expected in equatorial and sun-synchronous LowEarth orbits over orbital periods spanning 6 months to 10 years, time lapses representative of satellite lifetimes. We introduce a new model of GAGG:Ce afterglow emission able to fully capture our observations. Results are applied to the HERMES-TP/SP scenario, aiming at an upper-bound estimate of the detector performance degradation due to the afterglow emission expected from the interaction between the scintillator and the nearEarth radiation environment.

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Giuseppe Dilillo, Riccardo Campana, Nicola Zampa, Fabio Fuschino, Giovanni Pauletta, Irina Rashevskaya, Filippo Ambrosino, Marco Baruzzo, Diego Cauz, Daniela Cirrincione, Marco Citossi, Giovanni Della Casa, Benedetto Di Ruzza, Gábor Galgóczi, Claudio Labanti, Yuri Evangelista, Jakub Ripa, Andrea Vacchi, Francesco Tommasino, Enrico Verroi, and Fabrizio Fiore "A summary on an investigation of GAGG:Ce afterglow emission in the context of future space applications within the HERMES nanosatellite mission", Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 1144493 (13 December 2020); https://doi.org/10.1117/12.2561053

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