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Novel method for identifying the cause of inherent ageing in Electron Multiplying Charge Coupled Devices

Evagora, A. M.; Murray, N. J.; Holland, A. D.; Burt, D. and Endicott, J. (2012). Novel method for identifying the cause of inherent ageing in Electron Multiplying Charge Coupled Devices. Journal of Instrumentation, 7(1) C01023.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1088/1748-0221/7/01/C01023
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Abstract

The charge multiplication process used in the Electron Multiplying CCD (EMCCD) is subject to an ageing effect in which the gain achieved at particular avalanche potentials, gradually decreases during operation. To utilise these devices for both space and terrestrial applications where recalibration of the gain is not feasible, a comprehensive understanding of the ageing process is required.

A custom automated test equipment (ATE) has been produced and used to develop the techniques required for investigating the ageing process alongside the verification of simulation work on the subject. Simulation work carried out by e2v technologies has suggested hole build-up at the Si/Si02 interface below one of the transfer gates. This build up of holes has now been linked with a reduction in avalanche potential in the device. A novel experimental technique has therefore been developed to determine the actual potentials within the device and thereby determine the validity of this prediction. The initial results tend to support simulation as an increase in the potential beneath one of the phases is observed.

Item Type: Journal Article
Copyright Holders: 2012 IOP Publishing Ltd and SISSA
ISSN: 1748-0221
Extra Information: Conference paper from 9th Internation Conference on Position Sensitive Detectors (PSD9)
Keywords: solid state detectors; avalanche-induced secondary effects
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
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Item ID: 34696
Depositing User: Jason Gow
Date Deposited: 24 Oct 2012 13:22
Last Modified: 24 Oct 2012 13:22
URI: http://oro.open.ac.uk/id/eprint/34696
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