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Proceedings Paper

Progress on the W. M. Keck Observatory segment repair project
Author(s): Dennis McBride; Allen Agliam; Ben Bergin; Jake Bilyk; Steve Doyle; John S. Hudek; Danya Jacob; Robert Meeks; Cailean O'Sullivan; Doug Perry; Kuochou Tai; Tod Von Boeckmann; Leslie Wold; Truman Wold
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Paper Abstract

The W. M. Keck Observatory Segment Repair Project is repairing stress-induced cracks at the support points in all of the 84 primary mirror segments. The repair process for each segment involves disassembling hardware, removing bonded attachments, grinding out the damaged glass, etching, bonding new attachments, reassembling , and testing on sky. This also presents an opportunity to inspect and thoroughly clean the supports and segments after almost 25 years of service. The production phase of the project will reach the halfway point of the repairs during the summer of 2018. This paper summarizes some of the issues encountered and anomalies discovered during the repair process and presents on-sky results of the performance of the repaired segments. An update on the project status, schedule, and budget is also presented. Details of the project development to the production phase, and step by step descriptions and photos of the repair process are included.

Paper Details

Date Published: 6 July 2018
PDF: 20 pages
Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 107000O (6 July 2018); doi: 10.1117/12.2312790
Show Author Affiliations
Dennis McBride, W. M. Keck Observatory (United States)
Allen Agliam, W. M. Keck Observatory (United States)
Ben Bergin, W. M. Keck Observatory (United States)
Jake Bilyk, W. M. Keck Observatory (United States)
Steve Doyle, W. M. Keck Observatory (United States)
John S. Hudek, W. M. Keck Observatory (United States)
Danya Jacob, W. M. Keck Observatory (United States)
Robert Meeks, W. M. Keck Observatory (United States)
Cailean O'Sullivan, W. M. Keck Observatory (United States)
Doug Perry, W. M. Keck Observatory (United States)
Kuochou Tai, W. M. Keck Observatory (United States)
Tod Von Boeckmann, W. M. Keck Observatory (United States)
Leslie Wold, W. M. Keck Observatory (United States)
Truman Wold, W. M. Keck Observatory (United States)


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

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