Progress on the W. M. Keck Observatory segment repair project

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

doi:10.1117/12.2312790

6 July 2018 Progress on the W. M. Keck Observatory segment repair project

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

Author Affiliations +

Proceedings Volume 10700, Ground-based and Airborne Telescopes VII; 107000O (2018) https://doi.org/10.1117/12.2312790
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

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.

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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, and Truman Wold "Progress on the W. M. Keck Observatory segment repair project", Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 107000O (6 July 2018); https://doi.org/10.1117/12.2312790

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