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15 July 2010 Converting a liquid nitrogen-cooled camera to closed-cycle cooling
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The detector for the ESPaDOnS spectrograph at the Canada-France-Hawaii Telescope (CFHT) is a CCD42-90 4.5kx2k CCD from e2v Industries in a liquid nitrogen cooled GL Scientific cryostat. This paper describes the conversion of this camera to closed-cycle cooling using a Polycold® cryogenic refrigeration system. Topics covered include vibration analysis, positional stability of the image plane, cool-down characteristics, PLC integration, and annual operational overheads for both systems.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tom Benedict, Jeff Ward, and Gregory Barrick "Converting a liquid nitrogen-cooled camera to closed-cycle cooling", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77352M (15 July 2010);


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