Starlight suppression from the starshade testbed at NGAS

Details Starlight suppression from the starshade testbed at NGAS Starlight suppression from the starshade testbed at NGAS

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spie.7440e...2s&link_type=abstract

Techniques and Instrumentation for Detection of Exoplanets IV. Edited by Shaklan, Stuart B. Proceedings of the SPIE, Volume 744

Physics

Scientific paper

We report on progress at the Northrop Grumman Aerospace Systems (NGAS) starshade testbed. The starshade testbed is a 42.8 m, vacuum chamber designed to replicate the Fresnel number of an equivalent full-scale starshade mission, namely the flagship New Worlds Observer (NWO) configuration. Subscale starshades manufactured by the NGAS foundry have shown 10-7 starlight suppression at an equivalent full-mission inner working angle of 85 milliarseconds. In this paper, we present an overview of the experimental set up, scaling relationships to an equivalent full-scale mission, and preliminary results from the testbed. We also discuss potential limitations of the current generation of starshades and improvements for the future.

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