Modelling radiation damage to ESA's Gaia satellite CCDs

George Seabroke; Andrew Holland; Mark Cropper

doi:10.1117/12.790968

22 July 2008 Modelling radiation damage to ESA's Gaia satellite CCDs

George Seabroke, Andrew Holland, Mark Cropper

Proceedings Volume 7021, High Energy, Optical, and Infrared Detectors for Astronomy III; 70211P (2008) https://doi.org/10.1117/12.790968
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

The Gaia satellite is a high-precision astrometry, photometry and spectroscopic ESA cornerstone mission, currently scheduled for launch in late 2011. Its primary science drivers are the composition, formation and evolution of the Galaxy. Gaia will not achieve its scientific requirements without detailed calibration and correction for radiation damage. Microscopic models of Gaia's CCDs are being developed to simulate the effect of radiation damage, charge trapping, which causes charge transfer inefficiency. The key to calculating the probability of a photoelectron being captured by a trap is the 3D electron density within each CCD pixel. However, this has not been physically modelled for Gaia CCD pixels. In this paper, the first of a series, we motivate the need for such specialised 3D device modelling and outline how its future results will fit into Gaia's overall radiation calibration strategy.

Citation Download Citation

George Seabroke, Andrew Holland, and Mark Cropper "Modelling radiation damage to ESA's Gaia satellite CCDs", Proc. SPIE 7021, High Energy, Optical, and Infrared Detectors for Astronomy III, 70211P (22 July 2008); https://doi.org/10.1117/12.790968

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