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The LSST camera 500-watt -130°C mixed refrigerant cooling system

Bowden, Gordon et al.
Brian J. Langton ; William A. Little ; Jacob R. Powers ; Rafe H. Schindler ; Sam Spektor
Publication Date: 
Friday, July 18, 2014
Conference Papers
SPIE Proceedings
Page #: 
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.
Bibtex reference: 
@INPROCEEDINGS{2014SPIE.9151E..3DB, author = {{Bowden}, G.~B. and {Langton}, B.~J. and {Little}, W.~A. and {Powers}, J.~R. and {Schindler}, R.~H. and {Spektor}, S.}, title = "{The LSST camera 500-watt -130{\deg}C mixed refrigerant cooling system}", booktitle = {Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series}, year = 2014, series = {Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series}, volume = 9151, month = jul, eid = {91513D}, pages = {91513D}, doi = {10.1117/12.2054990}, adsurl = {}, adsnote = {Provided by the SAO/NASA Astrophysics Data System} }

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