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Please use this identifier to cite or link to this item: http://hdl.handle.net/2014/42415

Title: Advancing technology for starlight supression via an external occulter
Authors: Lunar and Planetary Science and Exploration
Kasdin, N. J.
Lisman, D.
Shaklan, S.
Thomon, M.
Cady, E.
Martin, S.
Marchen, L.
Vanderbei, R. J.
Macintosh, B.
Savransky, D.
Rudd, R. E.
Mikula, J,
Lynch, D.
Keywords: external occulters
occulters
starshades
exoplanets
high-contrast imaging
Issue Date: 5-Jul-2012
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012.
Citation: SPIE Astronomical Telescopes+Instrumentation, Amsterdam, Netherlands, July 1-6, 2012
Abstract: It is likely that the coming decade will see the development of a large visible light telescope with enabling technology for imaging exosolar Earthlike planets in the habitable zone of nearby stars. One such technology utilizes an external occulter, a satellite flying far from the telescope and employing a large screen, or starshade, to suppress the incoming starlight sufficiently for detecting and characterizing exoplanets. This trades the added complexity of building the precisely shaped starshade and flying it in formation against simpli cations in the telescope since extremely precise wavefront control is no longer necessary. In this paper we present the results of our project to design, manufacture, and measure a prototype occulter petal as part of NASA's first Technology Development for Exoplanet Missions program. We describe the mechanical design of the starshade and petal, the precision manufacturing tolerances, and the metrology approach. We demonstrate that the prototype petal meets the requirements and is consistent with a full-size occulter achieving better than 10¯¹° contrast
URI: http://hdl.handle.net/2014/42415
Appears in Collections:JPL TRS 1992+

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