Design, Tolerancing and Prototyping of Starshades for Exoplanet Detection and Characterization

Details Design, Tolerancing and Prototyping of Starshades for Exoplanet Detection and Characterization Design, Tolerancing and Prototyping of Starshades for Exoplanet Detection and Characterization

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725312k&link_type=abstract

American Astronomical Society, AAS Meeting #217, #253.12; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Starshades provide the starlight suppression needed for detecting and characterizing exoplanets with a much simpler telescope and instrument than is required for the equivalent performing coronagraph. The key challenges with starshades are in deploying a large structure and controlling its shape within precise tolerances. The required tolerances are established by modeling the effect that various mechanical and thermal errors have on scatter in the telescope image plane and by suballocating the allowable contrast degradation between these error sources. We present a representative error budget consistent with detection and characterization of exo-earths and a starshade design that is tailored to satisfying these requirements. Prototype petals are in development at JPL and one will be integrated with an optical edge provided by Lockheed Martin as part of a Technology Demonstration for Exoplanet Missions study led by Princeton University. The TDEM activity includes a demonstration of the capability to achieve what is considered to be the most stringent requirement, the manufacturing tolerances on petal shape.

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