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Proceedings Paper

EXCEDE technology development III: first vacuum tests
Author(s): Ruslan Belikov; Julien Lozi; Eugene Pluzhnik; Troy T. Hix; Eduardo Bendek; Sandrine J. Thomas; Dana H. Lynch; Roger Mihara; J. Wes Irwin; Alan L. Duncan; Thomas P. Greene; Olivier Guyon; Richard L. Kendrick; Eric H. Smith; Fred C. Witteborn; Glenn Schneider
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Paper Abstract

This paper is the third in the series on the technology development for the EXCEDE (EXoplanetary Circumstellar Environments and Disk Explorer) mission concept, which in 2011 was selected by NASA's Explorer program for technology development (Category III). EXCEDE is a 0.7m space telescope concept designed to achieve raw contrasts of 1e6 at an inner working angle of 1.2 l/D and 1e7 at 2 l/D and beyond. This will allow it to directly detect and spatially resolve low surface brightness circumstellar debris disks as well as image giant planets as close as in the habitable zones of their host stars. In addition to doing fundamental science on debris disks, EXCEDE will also serve as a technological and scientific precursor for any future exo-Earth imaging mission. EXCEDE uses a Starlight Suppression System (SSS) based on the PIAA coronagraph, enabling aggressive performance. Previously, we reported on the achievement of our first milestone (demonstration of EXCEDE IWA and contrast in monochromatic light) in air. In this presentation, we report on our continuing progress of developing the SSS for EXCEDE, and in particular (a) the reconfiguration of our system into a more flight-like layout, with an upstream deformable mirror and an inverse PIAA system, and (b) testing this system in a vacuum chamber, including IWA, contrast, and stability performance. Even though this technology development is primarily targeted towards EXCEDE, it is also germane to any exoplanet direct imaging space-based telescopes because of the many challenges common to different coronagraph architectures and mission requirements. This work was supported in part by the NASA Explorer program and Ames Research Center, University of Arizona, and Lockheed Martin SSC.

Paper Details

Date Published: 2 August 2014
PDF: 12 pages
Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 914323 (2 August 2014); doi: 10.1117/12.2057028
Show Author Affiliations
Ruslan Belikov, NASA Ames Research Ctr. (United States)
Julien Lozi, The Univ. of Arizona (United States)
Eugene Pluzhnik, NASA Ames Research Ctr. (United States)
Troy T. Hix, Lockheed Martin Space Systems Co. (United States)
Eduardo Bendek, NASA Ames Research Ctr. (United States)
Sandrine J. Thomas, NASA Ames Research Ctr. (United States)
Dana H. Lynch, NASA Ames Research Ctr. (United States)
Roger Mihara, Lockheed Martin Space Systems Co. (United States)
J. Wes Irwin, Lockheed Martin Space Systems Co. (United States)
Alan L. Duncan, The Univ. of Arizona (United States)
Thomas P. Greene, NASA Ames Research Ctr. (United States)
Olivier Guyon, The Univ. of Arizona (United States)
Richard L. Kendrick, Lockheed Martin Space Systems Co. (United States)
Eric H. Smith, Lockheed Martin Space Systems Co. (United States)
Fred C. Witteborn, NASA Ames Research Ctr. (United States)
Glenn Schneider, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 9143:
Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann; Mark Clampin; Giovanni G. Fazio; Howard A. MacEwen, Editor(s)

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