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Proceedings Paper

The LSST camera overview: design and performance
Author(s): Kirk Gilmore; Steven Kahn; Martin Nordby; Paul O'Connor; John Oliver; Veljko Radeka; Terry Schalk; Rafe Schindler; Rick Van Berg
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Paper Abstract

The LSST camera is a wide-field optical (0.35-1μm) imager designed to provide a 3.5 degree FOV with 0.2 arcsecond/pixel sampling. The detector format will be a circular mosaic providing approximately 3.2 Gigapixels per image. The camera includes a filter mechanism and shuttering capability. It is positioned in the middle of the telescope where cross-sectional area is constrained by optical vignetting and where heat dissipation must be controlled to limit thermal gradients in the optical beam. The fast f/1.2 beam will require tight tolerances on the focal plane mechanical assembly. The focal plane array operates at a temperature of approximately -100°C to achieve desired detector performance. The focal plane array is contained within a cryostat which incorporates detector front-end electronics and thermal control. The cryostat lens serves as an entrance window and vacuum seal for the cryostat. Similarly, the camera body lens serves as an entrance window and gas seal for the camera housing, which is filled with a suitable gas to provide the operating environment for the shutter and filter change mechanisms. The filter carousel accommodates 5 filters, each 75 cm in diameter, for rapid exchange without external intervention.

Paper Details

Date Published: 9 July 2008
PDF: 11 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70140C (9 July 2008);
Show Author Affiliations
Kirk Gilmore, Stanford Linear Accelerator Ctr. (United States)
Steven Kahn, Stanford Linear Accelerator Ctr. (United States)
Martin Nordby, Stanford Linear Accelerator Ctr. (United States)
Paul O'Connor, Brookhaven National Lab. (United States)
John Oliver, Harvard Univ. (United States)
Veljko Radeka, Brookhaven National Lab. (United States)
Terry Schalk, Univ. of California at Santa Cruz (United States)
Rafe Schindler, Stanford Linear Accelerator Ctr. (United States)
Rick Van Berg, Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

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