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    GMT M1 subsystem: status, design and testing

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    1070036.pdf
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    Final Published version
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    Author
    Gray, Peter
    Aguayo, Francisco
    Ashby, David S.
    Bugueno, Erich
    Hebert, Anthony
    Kechichian, Zaven
    Ranka, Trupti
    Sharma, Dev
    Tian, Frank
    Wadhavkar, Abhijit
    Fischer, Barbara
    Soto, Jose
    Swett, Hector
    Thanasekaran, Divya
    Ford, John
    Gusick, Michael
    Show allShow less
    Affiliation
    Univ Arizona
    Issue Date
    2018
    Keywords
    Active Optics
    Active Support System
    Actuator Calibration System
    Hardpoint
    Heat Exchanger
    GMT
    M1
    Primary Mirror
    Static Support
    Support Actuator
    Test Cell
    Show allShow less
    
    Metadata
    Show full item record
    Publisher
    SPIE-INT SOC OPTICAL ENGINEERING
    Citation
    Francisco Aguayo, Dave Ashby, Erich Bugueno, Barbara Fischer, John Ford, Peter Gray, Michael Gusick, Anthony Hebert, Zaven Kechichian, Trupti Ranka, Dev Sharma, Jose Soto, Hector Swett, Divya Thanasekaran, Frank Tian, and Abhijit Wadhavkar "GMT M1 subsystem: status, design and testing", Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070036 (6 July 2018); doi: 10.1117/12.2312937; https://doi.org/10.1117/12.2312937
    Journal
    GROUND-BASED AND AIRBORNE TELESCOPES VII
    Rights
    © 2018 SPIE.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    This paper describes the design, status, and test program for the Giant Magellan Telescope (GMT) Primary Mirror Subsystem (M1). It consists of the mirror cells, positioning system, support systems, and thermal control system. The seven 8.4m mirror segments are excluded from this paper because they are considered a separate subsystem of the M1 System. The M1 Subsystem leverages heritage design of similar telescope systems; for example, the Magellan telescopes and the Large Binocular Telescope. The M1 Subsystem incorporates pneumatic force actuators, hardpoints, and a thermal control ventilation system. Design developments have been introduced to address the challenging levels of performance and unique requirements needed by the GMT telescope. Imaging goals necessitate an increase in mirror support performance, figure control, and higher-levels of thermal control. Additionally, there are challenges associated with matching and tracking the relative position of the seven mirror segments for mirror phasing. The design of the static support system needs to protect the mirrors from loads transmitted through the structure during an earthquake. Finally, the telescope design with interchangeable off-axis mirror cells necessitate mirror cells and support components that function under any range of gravitational vector orientations. A full-scale Test Cell prototype is being constructed including production versions of mirror cell components to test and validate the M1 subsystem design. A Mirror Simulator will be used with the Test Cell to validate the M1 Control System. Later, a primary mirror segment will be used with the Test Cell to perform optical tests at the University of Arizona.
    ISSN
    9781510619531
    9781510619548
    DOI
    10.1117/12.2312937
    Version
    Final published version
    Sponsors
    GMTO Corporation; Astronomy Australia Ltd; Australian National University; Carnegie Institution for Science; Korea Astronomy and Space Science Institute; Sao Paulo Research Foundation; Smithsonian Institution; University of Chicago; University of Texas at Austin; University of Arizona; Arizona State University; Texas AM University; Harvard University
    Additional Links
    https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10700/2312937/GMT-M1-subsystem-status-design-and-testing/10.1117/12.2312937.full
    ae974a485f413a2113503eed53cd6c53
    10.1117/12.2312937
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