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Proceedings Paper

Determination of emissivities of key thermo-optical surfaces on the James Webb Space Telescope
Author(s): Jonathan W. Arenberg; Joshua Adamson; George Harpole; Matthew Macias; Malcolm B. Niedner; Charles W. Bowers; Kimberly I. Mehalick; Paul Lightsey
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Paper Abstract

The James Webb Telescope (JWST) is a large cryo-optical system. Many critical thermal control or optical surfaces are exposed to ground and flight environments and are expected to be contaminated to some level. In order to calculate key system performance parameters, such as stray light and radiative thermal transfer, the emissivity must be known in terms of contamination level and temperature. This paper will introduce the methods of determining these emissivities, and the discussion will cover the types of particulate and molecular contamination expected on JWST. The results of the calculations will be introduced and discussed.

Paper Details

Date Published: 28 August 2014
PDF: 10 pages
Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91433Q (28 August 2014); doi: 10.1117/12.2055514
Show Author Affiliations
Jonathan W. Arenberg, Northrop Grumman Aerospace Systems (United States)
Joshua Adamson, Northrop Grumman Aerospace Systems (United States)
George Harpole, Northrop Grumman Aerospace Systems (United States)
Matthew Macias, Northrop Grumman Aerospace Systems (United States)
Malcolm B. Niedner, NASA Goddard Space Flight Ctr. (United States)
Charles W. Bowers, NASA Goddard Space Flight Ctr. (United States)
Kimberly I. Mehalick, NASA Goddard Space Flight Ctr. (United States)
Paul Lightsey, Ball Aerospace & Technologies Corp. (United States)


Published in SPIE Proceedings Vol. 9143:
Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann; Mark Clampin; Giovanni G. Fazio; Howard A. MacEwen, Editor(s)

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