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Proceedings Paper

The LSST camera 500-watt -130 degC mixed refrigerant cooling system
Author(s): Gordon B. Bowden; Brian J. Langton; William A. Little; Jacob R. Powers; Rafe H. Schindler; Sam Spektor
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Paper Abstract

The LSST Camera has a higher cryogenic heat load than previous CCD telescope cameras due to its large size (634 mm diameter focal plane, 3.2 Giga pixels) and its close coupled front-end electronics operating at low temperature inside the cryostat. Various refrigeration technologies are considered for this telescope/camera environment. MMR-Technology’s Mixed Refrigerant technology was chosen. A collaboration with that company was started in 2009. The system, based on a cluster of Joule-Thomson refrigerators running a special blend of mixed refrigerants is described. Both the advantages and problems of applying this technology to telescope camera refrigeration are discussed. Test results from a prototype refrigerator running in a realistic telescope configuration are reported. Current and future stages of the development program are described.

Paper Details

Date Published: 18 July 2014
PDF: 10 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91513D (18 July 2014); doi: 10.1117/12.2054990
Show Author Affiliations
Gordon B. Bowden, SLAC National Accelerator Lab. (United States)
Brian J. Langton, SLAC National Accelerator Lab. (United States)
William A. Little, MMR Technolgies, Inc. (United States)
Jacob R. Powers, SLAC National Accelerator Lab. (United States)
Rafe H. Schindler, SLAC National Accelerator Lab. (United States)
Sam Spektor, MMR Technologies, Inc. (United States)

Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)

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