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Proceedings Paper

LUVOIR backplane thermal architecture development through the composite CTE sensitivity study
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Paper Abstract

The Large UV/Optical/IR Surveyor (LUVOIR) is one of four 2020 Decadal Survey Missions, a concept for ‘flag-ship’ class space-borne observatory, operating across the multi-wavelength UV/Optical/NIR spectra. An Optical Telescope concept being considered is the segmented primary mirror architecture with composite backplane structure. In order to achieve the high-contrast imaging required to satisfy the primary science goals of this mission would require, roughly, 10 pico-meter wavefront RMS stability over a wavefront control time step of approximately 10 minutes. The LUVOIR primary mirror backplance support structure (PMBSS) requires active thermal management to maintain operational temperature while on orbit. Furthermore, the active thermal control must be sufficiently stable to prevent time-varying thermally induced distortions in the PMBSS. This paper describes a systematic approach to developing a thermal architecture of a modular composite section of the mirror support structure heavily guided by the sensitivity studies of the composite Coefficient of Thermal Expansion (CTE) values. Thermal and finite-element models, sensitivity studies against the absolute values and their variations of the composite CTE, the early findings from the thermal and thermaldistortion analyses are presented.

Paper Details

Date Published: 5 September 2017
PDF: 15 pages
Proc. SPIE 10398, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VIII, 103980D (5 September 2017); doi: 10.1117/12.2274632
Show Author Affiliations
Sang C. Park, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Michael J. Eisenhower, Smithsonian Astrophysical Observatory (United States)
Marcel Bluth, SGT, Inc. (United States)
Matthew R. Bolcar, NASA Goddard Space Flight Ctr. (United States)
Lee D. Feinberg, NASA Goddard Space Flight Ctr. (United States)
J. Scott Knight, Ball Aerospace & Technologies Corp. (United States)
David C. Redding, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 10398:
UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VIII
Howard A. MacEwen; James B. Breckinridge, Editor(s)

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