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Proceedings Paper

Numerical modeling of the Habex coronagraph
Author(s): John Krist; Stefan Martin; Gary Kuan; Bertrand Mennesson; Garreth Ruane; Navtej Saini; John Trauger; James Breckinridge; Dimitri Mawet; Philip Stahl; Jeffrey Davis
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Paper Abstract

The Habex study, commissioned by NASA in preparation for the 2020 Decadal Survey, is evaluating a 4 meter space telescope for high contrast imaging and spectral characterization of extrasolar terrestrial planets. Its off-axis configuration, active structural metrology, and low-disturbance pointing control provide an optimal system for coronagraphs. We present predictions of the Habex performance using a charge 6 vortex coronagraph that have been obtained using numerical modeling techniques developed for the WFIRST coronagraph. The models include realistic optical surface and polarization-induced aberrations, pointing jitter, and thermally-induced wavefront variations. Wavefront control using dual deformable mirrors is simulated to create a dark, high-contrast hole around the star. The results show that current technologies can closely approach the Habex performance goals, and with some additional development in key areas (e.g., deformable mirror surface quality, low-polarization coatings, etc.) over the next few years they should reliably meet them.

Paper Details

Date Published: 9 September 2019
PDF: 16 pages
Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 1111705 (9 September 2019);
Show Author Affiliations
John Krist, Jet Propulsion Lab. (United States)
Stefan Martin, Jet Propulsion Lab. (United States)
Gary Kuan, Jet Propulsion Lab. (United States)
Bertrand Mennesson, Jet Propulsion Lab. (United States)
Garreth Ruane, Jet Propulsion Lab. (United States)
Navtej Saini, Jet Propulsion Lab. (United States)
John Trauger, Jet Propulsion Lab. (United States)
James Breckinridge, Caltech (United States)
Dimitri Mawet, Caltech (United States)
Philip Stahl, NASA Marshall Space Flight Ctr. (United States)
Jeffrey Davis, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 11117:
Techniques and Instrumentation for Detection of Exoplanets IX
Stuart B. Shaklan, Editor(s)

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