2 August 2014 Technology development towards WFIRST-AFTA coronagraph
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NASA’s WFIRST-AFTA mission concept includes the first high-contrast stellar coronagraph in space. This coronagraph will be capable of directly imaging and spectrally characterizing giant exoplanets similar to Neptune and Jupiter, and possibly even super-Earths, around nearby stars. In this paper we present the plan for maturing coronagraph technology to TRL5 in 2014-2016, and the results achieved in the first 6 months of the technology development work. The specific areas that are discussed include coronagraph testbed demonstrations in static and simulated dynamic environment, design and fabrication of occulting masks and apodizers used for starlight suppression, low-order wavefront sensing and control subsystem, deformable mirrors, ultra-low-noise spectrograph detector, and data post-processing.
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Ilya Poberezhskiy, Ilya Poberezhskiy, Feng Zhao, Feng Zhao, Xin An, Xin An, Kunjithapatham Balasubramanian, Kunjithapatham Balasubramanian, Ruslan Belikov, Ruslan Belikov, Eric Cady, Eric Cady, Richard Demers, Richard Demers, Rosemary Diaz, Rosemary Diaz, Qian Gong, Qian Gong, Brian Gordon, Brian Gordon, Renaud Goullioud, Renaud Goullioud, Frank Greer, Frank Greer, Olivier Guyon, Olivier Guyon, Michael Hoenk, Michael Hoenk, N. Jeremy Kasdin, N. Jeremy Kasdin, Brian Kern, Brian Kern, John Krist, John Krist, Andreas Kuhnert, Andreas Kuhnert, Michael McElwain, Michael McElwain, Bertrand Mennesson, Bertrand Mennesson, Dwight Moody, Dwight Moody, Richard Muller, Richard Muller, Bijan Nemati, Bijan Nemati, Keith Patterson, Keith Patterson, A. J. Riggs, A. J. Riggs, Daniel Ryan, Daniel Ryan, Byoung-Joon Seo, Byoung-Joon Seo, Stuart Shaklan, Stuart Shaklan, Erkin Sidick, Erkin Sidick, Fang Shi, Fang Shi, Nicholas Siegler, Nicholas Siegler, Rémi Soummer, Rémi Soummer, Hong Tang, Hong Tang, John Trauger, John Trauger, J. Kent Wallace, J. Kent Wallace, Xu Wang, Xu Wang, Victor White, Victor White, Daniel Wilson, Daniel Wilson, Karl Yee, Karl Yee, Hanying Zhou, Hanying Zhou, Neil Zimmerman, Neil Zimmerman, "Technology development towards WFIRST-AFTA coronagraph", Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91430P (2 August 2014); doi: 10.1117/12.2060320; https://doi.org/10.1117/12.2060320


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