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Assessment of space proton radiation-induced charge transfer inefficiency in the CCD204 for the Euclid space observatory

Gow, J. P. D.; Murray, Neil; Holland, Andrew; Hall, D. J. Hall; Cropper, M.; Hopkinson, G. and Duvet, L. (2012). Assessment of space proton radiation-induced charge transfer inefficiency in the CCD204 for the Euclid space observatory. Journal of Instrumentation, 7(C01030)

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URL: http://iopscience.iop.org/1748-0221/7/01/C01030
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1088/1748-0221/7/01/C01030
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Abstract

Euclid is a medium class European Space Agency mission candidate for launch in 2019 with a primary goal to study the dark universe using the weak lensing and baryonic acoustic oscillations techniques. Weak lensing depends on accurate shape measurements of distant galaxies. Therefore it is beneficial that the effects of radiation-induced charge transfer inefficiency (CTI) in the Euclid CCDs over the course of the 5 year mission at L2 are understood. This will allow, through experimental analysis and modelling techniques, the effects of radiation induced CTI on shape to be decoupled from those of mass inhomogeneities along the line-of-sight. This paper discusses a selection of work from the study that has been undertaken using the e2v CCD204 as part of the initial proton radiation damage assessment for Euclid. The experimental arrangement and procedure are described followed by the results obtained, thereby allowing recommendations to be made on the CCD operating temperature, to provide an insight into CTI effects using an optical background, to assess the benefits of using charge injection on CTI recovery and the effect of the use of two different methods of serial clocking on serial CTI. This work will form the basis of a comparison with a p-channel CCD204 fabricated using the same mask set as the n-channel equivalent. A custom CCD has been designed, based on this work and discussions between e2v technologies plc. and the Euclid consortium, and designated the CCD273.

Item Type: Journal Article
Copyright Holders: 2012 IOP Publishing Ltd and SISSA
ISSN: 1748-0221
Keywords: Radiation damage evaluation methods; Radiation damage to detector materials (solid state); Detectors for UV, visible and IR photons; CCD
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 31423
Depositing User: Jason Gow
Date Deposited: 24 Jan 2012 12:27
Last Modified: 20 Nov 2013 09:20
URI: http://oro.open.ac.uk/id/eprint/31423
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