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Numerical modeling of the Habex coronagraph

Krist, John and Martin, Stefan and Kuan, Gary and Mennesson, Bertrand and Ruane, Garreth and Saini, Navtej and Trauger, John and Breckinridge, James and Mawet, Dimitri and Stahl, Philip and Davis, Jeffrey (2019) Numerical modeling of the Habex coronagraph. In: Techniques and Instrumentation for Detection of Exoplanets IX. Proceedings of SPIE. No.11117. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 1111705. ISBN 9781510629271.

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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.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Mennesson, Bertrand0000-0003-4205-4800
Ruane, Garreth0000-0003-4769-1665
Breckinridge, James0000-0002-9488-098X
Mawet, Dimitri0000-0002-8895-4735
Additional Information:© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was performed at the Jet Propulsion Laboratory/California Institute of Technology under contract to NASA. The decision to implement WFIRST will not be finalized until NASA’s completion of the National Environmental Policy Act (NEPA) process. This document is being made available for information purposes only.
Group:Astronomy Department
Funding AgencyGrant Number
Subject Keywords:Habex, coronagraph
Series Name:Proceedings of SPIE
Issue or Number:11117
Record Number:CaltechAUTHORS:20190913-072409336
Persistent URL:
Official Citation:John Krist, Stefan Martin, Gary Kuan, Bertrand Mennesson, Garreth Ruane, Navtej Saini, John Trauger, James Breckinridge, Dimitri Mawet, Philip Stahl, and Jeffrey Davis "Numerical modeling of the Habex coronagraph", Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 1111705 (9 September 2019);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98625
Deposited By: Tony Diaz
Deposited On:13 Sep 2019 14:51
Last Modified:16 Nov 2021 17:40

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