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Assessment of proton radiation-induced charge transfer inefficiency in the CCD273 detector for the Euclid Dark Energy Mission

Gow, J. P. D.; Murray, N. J.; Hall, D. J.; Clarke, A. S.; Burt, D.; Endicott, J. and Holland, A. D. (2012). Assessment of proton radiation-induced charge transfer inefficiency in the CCD273 detector for the Euclid Dark Energy Mission. In: High Energy, Optical, and Infrared Detectors for Astronomy V, 1-6 July 2012, Amsterdam.

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URL: http://proceedings.spiedigitallibrary.org/proceedi...
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1117/12.925980
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Abstract

Euclid is a medium class mission selected 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, therefore it is beneficial that the effects of radiation-induced charge transfer inefficiency (CTI) in the Euclid CCD over the six year mission are understood and minimised. This paper describes the initial evaluation of the tolerance to radiation induced charge transfer inefficiency (CTI) of the CCD273 produced by e2v technologies plc, making comparisons with the previous CCD selected for Euclid the CCD203. The CCD273 benefits from the inclusion of a charge injection structure for trap suppression and a reduction in the register channel width. The improvement in tolerance to radiation induced serial CTI achieved by reducing the channel width from 50 um to 20 um was measured experimentally to be a factor of 1.7, which compares well to a factor of 1.9 found using a charge volume model.

Item Type: Conference Item
Copyright Holders: 2012 Society of Photo-Optical Instrumentation Engineers
Extra Information: Proc. SPIE 8453, High Energy, Optical, and Infrared Detectors for Astronomy V, 845316 (September 25, 2012);
Keywords: CCD; Euclid; proton radiation damage; n-channel; charge transfer efficiency
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 34922
Depositing User: Jason Gow
Date Deposited: 31 Oct 2012 10:31
Last Modified: 20 Nov 2013 09:25
URI: http://oro.open.ac.uk/id/eprint/34922
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