Variation of Thermal Emittance of Thermal Control Materials during Simultaneous Irradiation of Electrons and Ultraviolet Rays
871485
07/01/1987
- Event
- 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.
- 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.