22 July 2014 Baseline design and requirements for the LSST rotating enclosure (dome)
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Abstract
The Large Synoptic Survey Telescope (LSST) is a large (8.4 meter) wide-field (3.5 degree) survey telescope, which will be located on the Cerro Pachón summit in Chile. As a result of the wide field of view, its optical system is unusually susceptible to stray light; consequently besides protecting the telescope from the environment the rotating enclosure (Dome) also provides indispensible light baffling. All dome vents are covered with light baffles which simultaneously provide both essential dome flushing and stray light attenuation. The wind screen also (and primarily) functions as a light screen providing only a minimum clear aperture. Since the dome must operate continuously, and the drives produce significant heat, they are located on the fixed lower enclosure to facilitate glycol water cooling. To accommodate day time thermal control, a duct system channels cooling air provided by the facility when the dome is in its parked position.
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D. R. Neill, D. R. Neill, J. DeVries, J. DeVries, E. Hileman, E. Hileman, J. Sebag, J. Sebag, W. Gressler, W. Gressler, O. Wiecha, O. Wiecha, J. Andrew, J. Andrew, W. Schoening, W. Schoening, } "Baseline design and requirements for the LSST rotating enclosure (dome)", Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91454O (22 July 2014); doi: 10.1117/12.2056521; https://doi.org/10.1117/12.2056521
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