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Proton-induced Random Telegraph Signal in the CMOS imaging sensor for JANUS, the visible imaging telescope on JUICE

Winstone, G. P.; Soman, M. R.; Allanwood, E. A. H.; Holland, A. D.; Gow, J. P. D.; Stefanov, K. and Leese, M. (2015). Proton-induced Random Telegraph Signal in the CMOS imaging sensor for JANUS, the visible imaging telescope on JUICE. In: Proc. SPIE 96020N.

DOI (Digital Object Identifier) Link: https://doi.org/10.1117/12.2187011
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Abstract

JUpiter ICy moons Explorer (JUICE) is an ESA L class mission due for launch in 2022 as part of the agency’s Cosmic Vision program [1][2]. The primary science goal is to explore and characterise Jupiter and several of its potentially habitable icy moons, particularly Ganymede, Europa and Callisto.
The JANUS instrument is designated to be the scientific imager on-board the spacecraft with a wavelength range between 400 nm and 1000 nm and consists of a catoptric telescope coupled to a CMOS detector [3], specifically the CIS115 monolithic active pixel sensor supplied by e2v technologies[3]. A CMOS sensor has been chosen due to a combination of the high radiation tolerance required for all systems aboard the spacecraft and its capability of operating with integration times as low as 1 ms, which is required to prevent blur when imaging the moons at fast ground velocities since the camera has no mechanical shutter. However, an important consideration of using CMOS in high radiation environments is the generation of defects or defect clusters that result in pixels exhibiting Random Telegraph Signal (RTS)[5].
A study of RTS effects in the CIS115 has been undertaken, and the method applied to identify pixels in the array that display RTS behaviour is discussed and individual RTS-exhibiting pixels are characterised. The changes observed in RTS behaviour following irradiation of the CIS115 with protons is presented and the temperature dependence of the RTS behaviour is studied. The implications on the camera design and imaging requirements of the mission are examined.

Item Type: Conference or Workshop Item
ISSN: 0277-786X
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Centre for Electronic Imaging (CEI)
Space
Item ID: 44479
Depositing User: Matthew Soman
Date Deposited: 05 Oct 2015 12:26
Last Modified: 07 Dec 2018 10:35
URI: http://oro.open.ac.uk/id/eprint/44479
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