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Simplified charge transfer inefficiency correction in CCDs by trap-pumping

Gow, Jason P.D. and Murray, Neil J. (2016). Simplified charge transfer inefficiency correction in CCDs by trap-pumping. In: High Energy, Optical, and Infrared Detectors for Astronomy VII, 99152A.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1117/12.2232706
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Abstract

A major concern when using Charge-Coupled Devices in hostile radiation environments is radiation induced Charge Transfer Inefficiency. The displacement damage from non-ionising radiation incident on the detector creates defects within the silicon lattice, these defects can capture and hold charge for a period of time dependent on the operating temperature and the type of defect, or “trap species”. The location and type of defect can be determined to a high degree of precision using the trap-pumping technique, whereby background charges are input and then shuffled forwards and backwards between pixels many times and repeated using different transfer timings to promote resonant charge-pumping at particular defect sites. Where the charge transfer timings used in the trap-pumping process are equivalent to the nominal CCD readout modes, a simple “trap-map” of the defects that will most likely contribute to charge transfer inefficiency in the CCD array can be quickly generated. This paper describes a concept for how such a “trap-map” can be used to correct images subject to non-ionising radiation damage and provides initial results from an analytical algorithm and our recommendations for future developments.

Item Type: Conference or Workshop Item
Copyright Holders: 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
ISSN: 0277-786X
Keywords: CCD; trap-pumping; charge recovery; charge transfer efficiency; proton radiation damage
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 47004
Depositing User: Jason Gow
Date Deposited: 12 Aug 2016 14:45
Last Modified: 01 May 2019 11:24
URI: http://oro.open.ac.uk/id/eprint/47004
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