CubeSat in-orbit validation of in-situ performance by high fidelity radiation modelling

• URL: http://arxiv.org/abs/2209.00408v1
• Date: Thu, 1 Sep 2022 12:33:27 GMT
• Title: CubeSat in-orbit validation of in-situ performance by high fidelity radiation modelling
• Authors: Arpad Lenart, Srihari Sivasankaran, Daniel K. L. Oi, Alexander Ling, Peter Neilson, Bernhard Hidding
• Abstract summary: The SpooQy-1 CubeSat mission demonstrated polarization-based quantum entanglement correlations using avalanche photodiodes for single-photon detection. We report the increasing dark count rates of two silicon Geiger-mode avalanche photodiodes observed throughout its 2 year orbital lifetime. We implement a high-fidelity radiation model combined with 3D computer aided design models of the SpooQy-1 CubeSat to estimate the accumulated displacement damage dose in each photodiode.
• Score: 55.41644538483948
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Space based quantum technologies are essential building blocks for global quantum networks. However, the optoelectronic components and devices used are susceptible to radiation damage. The SpooQy-1 CubeSat mission demonstrated polarization-based quantum entanglement correlations using avalanche photodiodes for single-photon detection. We report the increasing dark count rates of two silicon Geiger-mode avalanche photodiodes (GM-APD) observed throughout its 2 year orbital lifetime. As a means of diagnosing the unexpected trends in the increase of dark counts, we implement a high-fidelity radiation model combined with 3D computer aided design models of the SpooQy-1 CubeSat to estimate the accumulated displacement damage dose in each photodiode. Using these results, we were able to support the claim that differences in radiation shielding was a major contributor to the observed in-orbit data. This illustrates how radiation modelling can have applications beyond conventional lifetime estimates for low-earth orbit CubeSats.

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