Variation of Thermal Emittance of Thermal Control Materials during Simultaneous Irradiation of Electrons and Ultraviolet Rays

871485

07/01/1987

Event
Intersociety Conference on Environmental Systems
Authors Abstract
Content
Variation of the total hemispherical emittance of spacecraft thermal control films resulting from irradiation is discussed. An electron energy of 30 KeV and a UV intensity of 3 sun equivalents are used. The emittance is measured in situ by the calorimetric method. The emittance of silver-Teflon film increases slightly with increasing the electron fluence. Its increment is less than 0.02 at a fluence of 1 × 1015 e/cm2, and very small for further irradiation. Addition of UV rays does not alter this situation. The emittance of aluminized Kapton film is not changed appreciably by irradiation.
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DOI
https://doi.org/10.4271/871485
Pages
8
Citation
Koitabashi, M., Enomoto, J., and Kimura, H., "Variation of Thermal Emittance of Thermal Control Materials during Simultaneous Irradiation of Electrons and Ultraviolet Rays," SAE Technical Paper 871485, 1987, https://doi.org/10.4271/871485.
Additional Details
Publisher
Published
Jul 1, 1987
Product Code
871485
Content Type
Technical Paper
Language
English