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Proceedings Paper

Design description and commissioning performance of a stable coronagraph technology development testbed for direct imaging of Earth-like exoplanets
Author(s): Keith D. Patterson; Byoung-Joon Seo; Kunjithapatham Balasubramanian; Talso Chui; Brendan Crill; John Gill; Brian Kern; Ray Lam; David Marx; Dwight Moody; Camilo Mejia Prada; Garreth Ruane; Jordan Rupp; John Shaw; Fang Shi; Nicholas Siegler; Hong Tang; John Trauger; Victor White; Daniel Wilson; Karl Yee; Robert Zimmer
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Paper Abstract

Direct imaging of an Earth-like exoplanet requires starlight suppression with a contrast ratio on the order of 1×10-10 at small angular separations of 100 milliarcseconds or less in visible light. To aid the technology development to reach this capability and enable future exoplanet missions, we built a high contrast coronagraph testbed, titled the Decadal Survey Testbed (DST). As of early 2019, the testbed has repeatedly demonstrated a monochromatic contrast floor about 1×10-10, and broadband performance at 550 nm with 10% color band- width <4×10-10 . The testbed has also demonstrated open-loop contrast drift rates of around 10-10/hour, temperature drift stabilities of <10 milliKelvins/day, passive pointing stability of around 0.1 λ/D per day on the occulting mask, and rms pointing jitter around 0.005 λ/D. This paper focusses primarily on the testbed hardware description, and a companion paper by Seo et al. details the experimental results.

Paper Details

Date Published: 16 September 2019
PDF: 13 pages
Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 111171U (16 September 2019); doi: 10.1117/12.2530401
Show Author Affiliations
Keith D. Patterson, Jet Propulsion Lab. (United States)
Byoung-Joon Seo, Jet Propulsion Lab. (United States)
Kunjithapatham Balasubramanian, Jet Propulsion Lab. (United States)
Talso Chui, Jet Propulsion Lab. (United States)
Brendan Crill, Jet Propulsion Lab. (United States)
John Gill, Jet Propulsion Lab. (United States)
Brian Kern, Jet Propulsion Lab. (United States)
Ray Lam, Jet Propulsion Lab. (United States)
David Marx, Jet Propulsion Lab. (United States)
Dwight Moody, Jet Propulsion Lab. (United States)
Camilo Mejia Prada, Jet Propulsion Lab. (United States)
Garreth Ruane, Jet Propulsion Lab. (United States)
Jordan Rupp, Jet Propulsion Lab. (United States)
John Shaw, Jet Propulsion Lab. (United States)
Fang Shi, Jet Propulsion Lab. (United States)
Nicholas Siegler, Jet Propulsion Lab. (United States)
Hong Tang, Jet Propulsion Lab. (United States)
John Trauger, Jet Propulsion Lab. (United States)
Victor White, Jet Propulsion Lab. (United States)
Daniel Wilson, Jet Propulsion Lab. (United States)
Karl Yee, Jet Propulsion Lab. (United States)
Robert Zimmer, Jet Propulsion Lab. (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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