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Proceedings Paper

Converting a liquid nitrogen-cooled camera to closed-cycle cooling
Author(s): Tom Benedict; Jeff Ward; Gregory Barrick
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Paper Abstract

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.

Paper Details

Date Published: 15 July 2010
PDF: 9 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77352M (15 July 2010); doi: 10.1117/12.858178
Show Author Affiliations
Tom Benedict, Canada-France-Hawaii Telescope (United States)
Jeff Ward, Canada-France-Hawaii Telescope (United States)
Gregory Barrick, Canada-France-Hawaii Telescope (United States)

Published in SPIE Proceedings Vol. 7735:
Ground-based and Airborne Instrumentation for Astronomy III
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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