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Proceedings Paper

Optical instrument thermal control on the Large Ultraviolet/Optical/Infrared Surveyor
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Paper Abstract

The Large Ultraviolet/Optical/Infrared Surveyor (LUVOIR) is a multi-wavelength observatory commissioned by NASA as one of four large mission concept studies for the Astro2020 Decadal Survey. Two concepts are under study which bound a range of cost, risk, and scientific return: an 8-meter diameter unobscured segmented aperture primary mirror and a 15- meter segmented aperture primary mirror. Each concept carries with it an accompanying suite of instruments. The Extreme Coronagraph for Living Planetary Systems (ECLIPS) is a near-ultraviolet (NUV)/optical/near-infrared (NIR) coronagraph; the LUVOIR Ultraviolet Multi-object Spectrograph (LUMOS) provides multi-object imaging spectroscopy in the 100-400 nanometer ultraviolet (UV) range; and the High Definition Imager (HDI) is a wide field-of-view near-UV/optical/near-IR camera that can also perform astrometry. The 15-meter concept also contains an additional instrument, Pollux, which is a high-resolution UV spectro-polarimeter. While the observatory is nominally at a 270 Kelvin operational temperature, the requirements of imaging in both IR and UV require separate detectors operating at different temperature regimes, each with stringent thermal stability requirements. The change in observatory size requires two distinct thermal designs per instrument. In this current work, the thermal architecture is presented for each instrument suite. We describe here the efforts made to achieve the target operational temperatures and stabilities with passive thermal control methods. Additional discussion will focus on how these instrument thermal designs impact the overall system-level architecture of the observatory and indicate the thermal challenges for hardware implementation.

Paper Details

Date Published: 9 September 2019
PDF: 13 pages
Proc. SPIE 11115, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX, 111150Y (9 September 2019);
Show Author Affiliations
Kan Yang, NASA Goddard Space Flight Ctr. (United States)
Matthew R. Bolcar, NASA Goddard Space Flight Ctr. (United States)
Julie A. Crooke, NASA Goddard Space Flight Ctr. (United States)
Jason E. Hylan, NASA Goddard Space Flight Ctr. (United States)
Sang C. Park, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Regis Venti, NASA Goddard Space Flight Ctr. (United States)
Bryan D. Matonak, NASA Goddard Space Flight Ctr. (United States)
Michael K. Choi, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 11115:
UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX
Allison A. Barto; James B. Breckinridge; H. Philip Stahl, Editor(s)

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