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Pocket pumped image analysis

Kotov, I. V.; O׳Connor, P. and Murray, N. (2015). Pocket pumped image analysis. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 787 pp. 26–33.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1016/j.nima.2014.10.049
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Abstract

The pocket pumping technique is used to detect small electron trap sites. These traps, if present, degrade CCD charge transfer efficiency. To reveal traps in the active area, a CCD is illuminated with a flat field and, before image is read out, accumulated charges are moved back and forth number of times in parallel direction. As charges are moved over a trap, an electron is removed from the original pocket and re-emitted in the following pocket. As process repeats one pocket gets depleted and the neighboring pocket gets excess of charges. As a result a “dipole” signal appears on the otherwise flat background level. The amplitude of the dipole signal depends on the trap pumping efficiency. This paper is focused on trap identification technique and particularly on new methods developed for this purpose. The sensor with bad segments was deliberately chosen for algorithms development and to demonstrate sensitivity and power of new methods in uncovering sensor defects.

Item Type: Journal Item
Copyright Holders: 2015 Elsevier B.V.
ISSN: 0168-9002
Keywords: CCD; charge traps; charge transfer efficiency
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 44288
Depositing User: Neil Murray
Date Deposited: 09 Sep 2015 09:18
Last Modified: 08 Dec 2018 13:09
URI: http://oro.open.ac.uk/id/eprint/44288
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