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7 November 2023 Habitable Worlds Observatory (HWO): realizable ZERODUR mirror thermal characteristics for stability
Tony Hull, Janina Krieg, Clemens Kunisch, Ralf Jedamzik, Thomas Westerhoff
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Proceedings Volume PC12677, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV; PC1267704 (2023) https://doi.org/10.1117/12.2677695
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States
Abstract
ZERODUR®’s thermal characteristics provide insight into realization of new domains of dimensional stability that are expected to be required for NASA’s Habitable Worlds Observatory (HWO). These attributes go far beyond the thermal trade space usually considered, namely low Coefficient of Thermal Expansion (CTE) and high transient resilience factor (Diffusivity/CTE). Response to thermal stimulus happens both at the segment scale, and at mid-spatial frequencies within the segment. Data resolved to these scales is crucial since perturbations at each of these scales will limit coronagraphic contrast. We will explore established studies on ZERODUR®, and what these suggest about the present state-of-the-art toward achieving HWO’s lofty requirements.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Tony Hull, Janina Krieg, Clemens Kunisch, Ralf Jedamzik, and Thomas Westerhoff "Habitable Worlds Observatory (HWO): realizable ZERODUR mirror thermal characteristics for stability", Proc. SPIE PC12677, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV, PC1267704 (7 November 2023); https://doi.org/10.1117/12.2677695
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KEYWORDS
Thermal stability
Mirrors
Observatories
Coronagraphy
Frequency response
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