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Testing and status of the LSST hexapods and rotator
Author(s): Ryan Sneed; Douglas R. Neill; Brendan Caldwell; Bryan Walter; Harini Sundararaman; Mike Warner
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Paper 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. Both the Secondary Mirror (M2) Cell Assembly and Camera utilize hexapods to facilitate optical positioning relative to the Primary/Tertiary (M1M3) Mirror. A rotator resides between the Camera and its hexapod to facilitate tracking. The hexapods and rotator have been designed, fabricated, assembled, and are currently being tested by Moog CSA. An update on these activities is provided along with a detailed discussion of the testing approach and results ranging from proof load and life testing to positioning performance. Particular emphasis is given to testing of the positioning accuracy, repeatability, and resolution of the hexapods and tracking accuracy and runout of the rotator. Verification of power off braking, heat dissipation, settling time, range of motion, and velocity requirements are also presented.

Paper Details

Date Published: 6 July 2018
PDF: 16 pages
Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070039 (6 July 2018); doi: 10.1117/12.2311500
Show Author Affiliations
Ryan Sneed, Moog CSA (United States)
Douglas R. Neill, LSST (United States)
Brendan Caldwell, Moog CSA (United States)
Bryan Walter, Moog CSA (United States)
Harini Sundararaman, LSST (United States)
Mike Warner, LSST (United States)

Published in SPIE Proceedings Vol. 10700:
Ground-based and Airborne Telescopes VII
Heather K. Marshall; Jason Spyromilio; Roberto Gilmozzi, Editor(s)

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