Proton induced damage after laboratory cold irradiation in CCD47-20 CCDs for CHEOPS

Peter Verhoeve; Sander Blommaert; Dennis Breeveld; Joerg ter Haar; Kate Isaak; Frederic Lemmel; Cornelis van der Luijt; Thibaut Prod'homme; Hans Smit; Brian Shortt; Ivo Visser; Attila Simon; Andrea Fortier; Christopher Broeg

doi:10.1117/12.2629353

29 August 2022 Proton induced damage after laboratory cold irradiation in CCD47-20 CCDs for CHEOPS

Peter Verhoeve, Sander Blommaert, Dennis Breeveld, Joerg ter Haar, Kate Isaak, Frederic Lemmel, Cornelis van der Luijt, Thibaut Prod'homme, Hans Smit, Brian Shortt, Ivo Visser, Attila Simon, Andrea Fortier, Christopher Broeg

Author Affiliations +

Proceedings Volume 12191, X-Ray, Optical, and Infrared Detectors for Astronomy X; 121910B (2022) https://doi.org/10.1117/12.2629353
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

The CCD47-20 detector of CHEOPS (CHaracterizing ExOPlanet Satellite, ESA/Switzerland), operated at -45°C, is developing an increasing number of hot pixels in orbit, due to particle-induced radiation damage in its 700 km, sun-synchronous dawn/dusk orbit. While the satellite offers the possibility to raise the detector’s temperature to well above +20°C, it is not clear whether this could have a beneficial effect on the hot pixel distribution, and which temperature and duration would be required. To inform the mission on the potential benefits of in-orbit annealing, we irradiated CCD47-20s from the CHEOPS flight production batch at -45°C with protons. After irradiation, the hot pixels were monitored for 7 days at -45°C Subsequently, the temperature was raised step-wise (up to +80°C) for 12 hrs, each step followed by characterisation at -45°C. A significant reduction in the hot pixel count was observed at each step. A recommendation for a possible in-orbit annealing procedure was derived.

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Peter Verhoeve, Sander Blommaert, Dennis Breeveld, Joerg ter Haar, Kate Isaak, Frederic Lemmel, Cornelis van der Luijt, Thibaut Prod'homme, Hans Smit, Brian Shortt, Ivo Visser, Attila Simon, Andrea Fortier, and Christopher Broeg "Proton induced damage after laboratory cold irradiation in CCD47-20 CCDs for CHEOPS", Proc. SPIE 12191, X-Ray, Optical, and Infrared Detectors for Astronomy X, 121910B (29 August 2022); https://doi.org/10.1117/12.2629353

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