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Proceedings Paper

Strategy for identifying and mitigating facility vibrations to improve optical performance at the W. M. Keck Observatory
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Paper Abstract

The W.M. Keck Observatory is conducting a focused effort to identify and mitigate facility vibrations that significantly affect optimal optical performance. This effort should improve the performance of both Keck adaptive optics systems, the laser guide star, the AO instruments, and the interferometer, and will benefit future high precision instruments. We present our strategy for mitigating vibrations in a large ground-based telescope. Our approach is to establish reasonable confidence in identifying the facility vibration sources that most significantly deteriorate optical performance. For the interferometer we completed vibration surveys that correlate vibrations on the interferometer beam path with direct vibration measurements on the telescope structure and facility. We developed a metric to evaluate the effect of vibrations on the entire interferometer beamline. From our surveys, we prioritized facility components to be addressed, and developed approaches to mitigate key vibrations contributions. Initial results show large local improvements, and global improvements to our vibration environment.

Paper Details

Date Published: 4 February 2003
PDF: 10 pages
Proc. SPIE 4837, Large Ground-based Telescopes, (4 February 2003); doi: 10.1117/12.456994
Show Author Affiliations
Michael Hess, W. M. Keck Observatory (United States)
Craig E. Nance, W. M. Keck Observatory (United States)
John W. Vause, W. M. Keck Observatory (United States)
Michael Hrynevych, W. M. Keck Observatory (United States)
Mark R. Swain, Jet Propulsion Lab. (United States)
Mark Colavita, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 4837:
Large Ground-based Telescopes
Jacobus M. Oschmann; Larry M. Stepp, Editor(s)

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