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The Origins Space telescope cryogenic-thermal architecture (Conference Presentation)
Author(s): Michael J. DiPirro
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Paper Abstract

The Origins Space Telescope (OST) is studied as a future Mid- and Far-Infrared Observatory. It’s scale is a NASA Astrophysics flagship mission to launch in the mid 2030’s. OST will cover the wavelength range from 6 to 600 µm. To reach the sky background for wavelengths greater than about 15 microns, it is necessary to restrict the telescope emission to temperatures lower than JWST (40 K). For 200 micron wavelengths temperatures of 4 K or lower are required. To achieve this low temperature active cooling is required, along with passive shielding and passive radiation to deep space. Currently two concepts are being studied: Concept 1 with a 9 m diameter primary and a suite of 5 extremely capable instruments providing both imaging and spectroscopy over the entire wavelength range. Concept 1 will require an SLS launch vehicle, currently in development, to reach Sun-Earth L2 (SEL2). Concept 2 is a more modest sized telescope with a collecting area equivalent to a 5 m primary, fewer deployments and 3 or 4 instruments also covering the entire wavelength range for imaging and spectroscopy, although with somewhat reduced spectroscopic resolution, and somewhat slower mapping speed. Concept 2’s mass and volume will fit into currently available rocket capabilities to reach SEL2. This paper will describe OST Concept 2’s cryogenic thermal architecture and thermal model results.

Paper Details

Date Published: 10 July 2018
Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 1069819 (10 July 2018); doi: 10.1117/12.2311913
Show Author Affiliations
Michael J. DiPirro, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 10698:
Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave
Makenzie Lystrup; Howard A. MacEwen; Giovanni G. Fazio; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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