Arid
DOI10.1117/12.2054680
Measurements of High-Contrast Starshade Performance
Glassman, Tiffany; Casement, Suzanne; Warwick, Steve; Novicki, Megan
通讯作者Glassman, Tiffany
会议名称Conference on Space Telescopes and Instrumentation - Optical, Infrared, and Millimeter Wave
会议日期JUN 22-27, 2014
会议地点Montreal, CANADA
英文摘要

The external starshade is a prospective method for the direct detection and spectral characterization of terrestrial planets around other stars, a key goal identified in ASTRO2010. As part of an ongoing campaign to validate the starlight-suppression performance of the starshade, we present our first results from our most recent desert test campaign, completed June 2, 2014. Our preliminary contrast measurement is similar to 1x10(-8), consistent with our previous result for the same 60 cm starshade. These data were collected with a 50% spectral bandpass, using a white-light LED as an incoherent light source, in a challenging outdoor test environment. Additional analysis may improve the calculated contrast and/or provide additional improvements to our test configuration, which is currently limited by a halo around the starshade, presumably caused by dust scatter in the atmosphere. The spectral coverage is limited only by the optics and detector in our test setup, not by the starshade itself. Our experimental setup is designed to provide starshade to telescope separation and telescope aperture size that are scaled as closely as possible to the canonical flight system. In this paper we describe key improvements to our test configuration and our latest results with the Hypergaussian starshade. Plans for the next phase of ground testing under a 2013 NASA TDEM award are discussed.


英文关键词exoplanets starshade diffraction occulter field test
来源出版物SPACE TELESCOPES AND INSTRUMENTATION 2014: OPTICAL, INFRARED, AND MILLIMETER WAVE
ISSN0277-786X
出版年2014
卷号9143
EISBN978-0-8194-9611-9
出版者SPIE-INT SOC OPTICAL ENGINEERING
类型Proceedings Paper
语种英语
国家USA
收录类别CPCI-S
WOS记录号WOS:000354526800082
WOS类目Astronomy & Astrophysics ; Instruments & Instrumentation ; Optics
WOS研究方向Astronomy & Astrophysics ; Instruments & Instrumentation ; Optics
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/303300
作者单位Northrop Grumman Aerosp Syst, Redondo Beach, CA 90278 USA
推荐引用方式
GB/T 7714
Glassman, Tiffany,Casement, Suzanne,Warwick, Steve,et al. Measurements of High-Contrast Starshade Performance[C]:SPIE-INT SOC OPTICAL ENGINEERING,2014.
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