Determination of emissivities of key thermo-optical surfaces on the James Webb Space Telescope
| Autor: | Kimberly I. Mehalick, Joshua Adamson, Matthew Macias, George Harpole, Jonathan W. Arenberg, Malcolm B. Niedner, Charles W. Bowers, Paul A. Lightsey |
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| Rok vydání: | 2014 |
| Předmět: |
Physics
business.industry Stray light James Webb Space Telescope Astrophysics::Instrumentation and Methods for Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Thermal transfer Thermal control law.invention Telescope Optics law Emissivity Radiative transfer Astrophysics::Earth and Planetary Astrophysics business Particulate contamination Remote sensing |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2055514 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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