Brian J. Langton ; William A. Little ; Jacob R. Powers ; Rafe H. Schindler ; Sam Spektor
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.
http://adsabs.harvard.edu/abs/2014SPIE.9151E..3DB
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 = {http://adsabs.harvard.edu/abs/2014SPIE.9151E..3DB},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
