Determination of emissivities of key thermo-optical surfaces on the James Webb Space Telescope

Jonathan W. Arenberg; Joshua Adamson; George Harpole; Matthew Macias; Malcolm B. Niedner; Charles W. Bowers; Kimberly I. Mehalick; Paul Lightsey

doi:10.1117/12.2055514

28 August 2014 Determination of emissivities of key thermo-optical surfaces on the James Webb Space Telescope

Jonathan W. Arenberg, Joshua Adamson, George Harpole, Matthew Macias, Malcolm B. Niedner, Charles W. Bowers, Kimberly I. Mehalick, Paul Lightsey

Author Affiliations +

Proceedings Volume 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave; 91433Q (2014) https://doi.org/10.1117/12.2055514
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

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.

Citation Download Citation

Jonathan W. Arenberg, Joshua Adamson, George Harpole, Matthew Macias, Malcolm B. Niedner, Charles W. Bowers, Kimberly I. Mehalick, and Paul Lightsey "Determination of emissivities of key thermo-optical surfaces on the James Webb Space Telescope", Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91433Q (28 August 2014); https://doi.org/10.1117/12.2055514

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available