Mount Hopkins, AZ
Smithsonian Institution, Multiple Mirror Telescope
Scope/Solutions
With the advent of economical large spun cast mirrors, the Smithsonian Institution and the University of Arizona wished to convert the Multiple Mirror Telescope (MMT) to a telescope with a single 6.5 m dia. mirror to retain its position as one of the world’s most powerful instruments. SGH developed the drawings and specifications for this modification.
Highlights of SGH’s work on this project include the following:
- Developed conversion concepts and the final designs of the new Optics Support Structure (OSS) and mirror cell structure
- Designed a system that allows for in-place aluminizing of the primary mirror by lifting in a vacuum head and using the mirror cell as the bottom part of vacuum chamber
- Designed the required modifications to the rotating observatory building to accommodate the larger OSS
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Project Summary
1995
Completion Date
Solutions
New Construction
Services
Advanced Analysis
Markets
Science & Defense
Client(s)
Harvard-Smithsonian Astrophysical Observatory
Key team members
Additional Projects
West
Idaho National Laboratory, Fuel Manufacturing Facility (MFC-704), Seismic Fragility Evaluation
SGH developed seismic fragilities for the MFC-704 structure (also referred to as the Fuel Manufacturing Facility) for input to a seismic probabilistic risk assessment.
West
Vanadium Technology Program, Long-Span Trusses
SGH conducted an initial feasibility study to investigate the potential use of these steels in four applications, including reinforcement in mini piles, high-strength open-web steel joists and joist girders, and progressive collapse protection for mid-rise buildings.