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Fabrication of coronagraph masks and laboratory scale star-shade masks: characteristics, defects and performance

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dc.contributor.author Balasubramanian, Kunjithapatham
dc.contributor.author Riggs, A. J. Eldorado
dc.contributor.author Cady, Eric
dc.contributor.author White, Victor
dc.contributor.author Yee, Karl
dc.contributor.author Wilson, Daniel
dc.contributor.author Eshternach, Pierre
dc.contributor.author Muller, Rich
dc.contributor.author Mejia Prada, Camilo
dc.contributor.author Seo, Byoung-Joon
dc.contributor.author Shi, Fang
dc.contributor.author Ryan, Daniel
dc.contributor.author Fregoso, Santos
dc.contributor.author Metzman, Jacob
dc.contributor.author Casey Wilson, Robert
dc.date.accessioned 2020-03-23T20:24:34Z
dc.date.available 2020-03-23T20:24:34Z
dc.date.issued 2017-08-07
dc.identifier.citation Techniques and Instrumentation for Detection of Exoplanets VIII, San Diego, California, August 8-10, 2017 en_US
dc.identifier.clearanceno CL#17-4487
dc.identifier.uri http://hdl.handle.net/2014/47769
dc.description.abstract NASA WFIRST mission has planned to include a coronagraph instrument to find and characterize exoplanets. Masks are needed to suppress the host star light to better than 10-8 – 10-9 level contrast over a broad bandwidth to enable the coronagraph mission objectives. Such masks for high contrast coronagraphic imaging require various fabrication technologies to meet a wide range of specifications, including precise shapes, micron scale island features, ultra-low reflectivity regions, uniformity, wave front quality, etc. We present the technologies employed at JPL to produce these pupil plane and image plane coronagraph masks, and lab-scale external occulter masks, highlighting accomplishments from the high contrast imaging testbed (HCIT) at JPL and from the high contrast imaging lab (HCIL) at Princeton University. Inherent systematic and random errors in fabrication and their impact on coronagraph performance are discussed with model predictions and measurements. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2017 en_US
dc.title Fabrication of coronagraph masks and laboratory scale star-shade masks: characteristics, defects and performance en_US
dc.type Preprint en_US


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