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Predictive thermal control applied to HabEx
Author(s): Thomas E. Brooks
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Paper Abstract

Exoplanet science can be accomplished with a telescope that has an internal coronagraph or with an external starshade. An internal coronagraph architecture requires extreme wavefront stability (10 pm change/10 minutes for 10-10 contrast), so every source of wavefront error (WFE) must be controlled. Analysis has been done to estimate the thermal stability required to meet the wavefront stability requirement. This paper illustrates the potential of a new thermal control method called predictive thermal control (PTC) to achieve the required thermal stability. A simple development test using PTC indicates that PTC may meet the thermal stability requirements. Further testing of the PTC method in flight-like environments will be conducted in the X-ray and Cryogenic Facility (XRCF) at Marshall Space Flight Center (MSFC).

Paper Details

Date Published: 5 September 2017
PDF: 7 pages
Proc. SPIE 10398, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VIII, 1039814 (5 September 2017); doi: 10.1117/12.2274338
Show Author Affiliations
Thomas E. Brooks, NASA Marshall Space Flight Ctr. (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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