In-space thermoelastic stability of starshade structures

Manan Arya; David Webb; Samuel C. Bradford; John Steeves; Flora Mechentel; P. D. Lisman; David Opland; Gregg Freebury; Jamie Abbott; Jeremy Senne; Charles Tan; Aaron Armour; Siu-Chun Lee; Larry Chan; James R. Tucker

doi:10.1117/12.2595936

1 August 2021 In-space thermoelastic stability of starshade structures

Manan Arya, David Webb, Samuel C. Bradford, John Steeves, Flora Mechentel, P. D. Lisman, David Opland, Gregg Freebury, Jamie Abbott, Jeremy Senne, Charles Tan, Aaron Armour, Siu-Chun Lee, Larry Chan, James R. Tucker

Author Affiliations +

Proceedings Volume 11823, Techniques and Instrumentation for Detection of Exoplanets X; 1182314 (2021) https://doi.org/10.1117/12.2595936
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

We describe testing and analysis conducted to demonstrate in-space thermoelastic shape stability of starshade structures. Thermoelastic deformation testing was conducted on key starshade structural components. These components were constructed at relevant scales and at relevant fidelity to flight-like structures. Results from thermoelastic deformation testing were used to calibrate high-fidelity finite element structural analysis techniques; these finite element tools were then used to predict the in-space thermoelastic distortions of a 26 m-diameter starshade. The in-space temperatures for these structures were predicted using a separate radiative-thermal finite element simulations, and were meant to envelope temperatures that a starshade would experience during periods of telescope shading. The predicted in-plane thermoelastic deformations of this 26 m-diameter starshade were found to be sufficient to fit into an overall error budget to enable instrument contrast better than 1e-10.

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Manan Arya, David Webb, Samuel C. Bradford, John Steeves, Flora Mechentel, P. D. Lisman, David Opland, Gregg Freebury, Jamie Abbott, Jeremy Senne, Charles Tan, Aaron Armour, Siu-Chun Lee, Larry Chan, and James R. Tucker "In-space thermoelastic stability of starshade structures", Proc. SPIE 11823, Techniques and Instrumentation for Detection of Exoplanets X, 1182314 (1 August 2021); https://doi.org/10.1117/12.2595936

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