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Proceedings Paper

LSST structural design
Author(s): Warren B. Davison; Mario H. Rascon; Brian Cuerden; Jacques Sebag; Chuck Claver; Gary Muller; Larry Daggert
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Paper Abstract

The Large Synoptic Survey Telescope (LSST) is an 8-meter class telescope with a proposed field of view between 3.0 and 3.5 degrees. The scientific goals of the survey establish a cadence that sets the telescope performance. The proposed cadence of the LSST telescope will typically require movements and settling of the telescope of approximately 3 degrees in 5 seconds. This dictates a high bandwidth to the telescope servo and thus a high locked rotor resonant frequency. In this study, the structure must accommodate three optical surfaces, the 8.4-meter primary, the 3-meter class secondary, and a 5-meter class tertiary in a long-tube configuration. The instrument must be accommodated in a "Trapped Focus" in the middle of the telescope. This imposes very stringent requirements on the structure and drives. This structure will require performance beyond the existing class of 8-meter telescopes. This can be achieved with the C-ring and azimuth platform concept demonstrated with the Large Binocular Telescope. The structure requires a low rotational inertia and a very high locked rotor resonant frequency at all angles of the sky. This is a challenging problem that can be overcome with this innovative solution.

Paper Details

Date Published: 29 September 2004
PDF: 9 pages
Proc. SPIE 5495, Astronomical Structures and Mechanisms Technology, (29 September 2004); doi: 10.1117/12.552233
Show Author Affiliations
Warren B. Davison, Steward Observatory/Univ. of Arizona (United States)
Mario H. Rascon, Steward Observatory/Univ. of Arizona (United States)
Brian Cuerden, Steward Observatory/Univ. of Arizona (United States)
Jacques Sebag, National Optical Astronomy Observatory (United States)
Chuck Claver, National Optical Astronomy Observatory (United States)
Gary Muller, National Optical Astronomy Observatory (United States)
Larry Daggert, National Optical Astronomy Observatory (United States)


Published in SPIE Proceedings Vol. 5495:
Astronomical Structures and Mechanisms Technology
Joseph Antebi; Dietrich Lemke, Editor(s)

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