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28 August 2014 Thermomechanical architecture of the VIS focal plane for Euclid
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Abstract
One of the main challenges for current and near future space experiments is the increase of focal plane complexity in terms of amount of pixels. In the frame work of the ESA Euclid mission to be launched in 2020, the Euclid Consortium is developing an extremely large and stable focal plane for the VIS instrument. CEA has developed the thermomechanical architecture of that Focal Plane taking into account all the very stringent performance and mission related requirements. The VIS Focal Plane Assembly integrates 36 CCDs (operated at 150K) connected to their front end electronics (operated at 280K) as to obtain one of the largest focal plane (∼0.6 billion pixels) ever built for space application after the GAIA one. The CCDs are CCD273 type specially designed and provided by the e2v company under ESA contract, front end electronics is studied and provided by MSSL. In this paper we first recall the specific requirements that have driven the overall architecture of the VIS-FPA and especially the solutions proposed to cope with the scientific needs of an extremely stable focal plane, both mechanically and thermally. The mechanical structure based on SiC material used for the cold sub assembly supporting the CCDs is detailed. We describe also the modular architecture concept that we have selected taking into account AIT-AIV and programmatic constraints.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jérôme Martignac, Michaël Carty, Thierry Tourette, Damien Bachet, Michel Berthé, Jean-Louis Augueres, Jérôme Amiaux, Jean Fontignie, Benoît Horeau, Diana Renaud, Sabrina Pottinger, James Denniston, Berend Winter, Phillip Guttridge, Richard Cole, Mark Cropper, Sami Niemi, John Coker, and Thomas Hunt "Thermomechanical architecture of the VIS focal plane for Euclid", Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91432Y (28 August 2014); https://doi.org/10.1117/12.2055998
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