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Proceedings Paper

Evaluation of thin films for the Next-Generation Space Telescope (NGST) sunshield
Author(s): Eve M. Wooldridge; Charles E. Powers
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Paper Abstract

The optics and detectors for the NGST, will operate at IR wavelengths between 0.5 and 30 micrometers . To accomplish the requirements set for NGST, the telescope and science module will have to operate at temperatures below 60 K. To achieve cryogenic temperatures, several of the current designs for NGST use a large deployable sunshield to passively cool the telescope. The current concepts for the sunshield consist of 4 to 6 layers of thin film thermal control material supported by deployable struts. The sunshield will need to be about 30 by 15 meters, and will have to survive for 10 years in a deeps space environment. A program has been initiated to identify thin film materials that will meet the NGST sunshield requirements. The first step in this program is a literature research that has identified potential thin film materials and coatings for the sunshield. The second step will involve an initial screening of these materials, followed by more rigorous testing of selected candidate materials. This testing will characterizes the mechanical, thermal and optical properties before and after exposure to a simulated NGST sunshield environment. In addition, because the sunshield will be folded and stowed before launch, the candidate materials will be folded, stowed and unfolded before exposure to the simulated environment.

Paper Details

Date Published: 28 August 1998
PDF: 7 pages
Proc. SPIE 3356, Space Telescopes and Instruments V, (28 August 1998); doi: 10.1117/12.324522
Show Author Affiliations
Eve M. Wooldridge, NASA Goddard Space Flight Ctr. (United States)
Charles E. Powers, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 3356:
Space Telescopes and Instruments V
Pierre Y. Bely; James B. Breckinridge, Editor(s)

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