INFRARED REFLECTANCE OF CO2 CRYODEPOSITS
Abstract
In-situ reflectance measurements were made for carbon dioxide (CO2) frosts formed on liquid-nitrogen-cooled substrates. The data were obtained spectrally in the wavelength range from 0.5 to 12.0 microns using an infrared integrating sphere. These measurements were made using the hemispherical- angular technique and resulted in the determination of the absolute reflectance. The properties of the CO2 frosts were studied by forming them on black epoxy paint and polished stainless steel substrates. The CO2 frosts were found to exhibit an anomalous dispersion reflectance peak at 4.3 microns which was shown to be a very sensitive indication of the presence of solid CO2. In addition, it was found that CO2 scatters short wavelength radiation significantly and is semitransparent for much of the wavelength range between 2.0 and 12.0 microns. The application of these results to other problems associated with cryogenically cooled surfaces is discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1970
- Accession Number
- AD0708509
Entities
People
- A. Matthew Smith
- B. A. Seiber
- Bobby E. Wood
Organizations
- Arnold Engineering Development Complex