Infrared Reflectance of Water Frosts Condensed on Liquid-Nitrogen-Cooled Surface in Vacuum
Abstract
Spectral absolute reflectance measurements from 0.5 to 12.0 micrometers were made for water cryodeposits formed on liquid-nitrogen-cooled surfaces in a vacuum infrared integrating sphere. The results are presented as functions of view angle, deposit thickness, and wavelength. The deposits were formed at pressures between .02 and .04 torr on cryogenically cooled black epoxy paint and polished stainless steel surfaces. All three forms of Ice I were observed - hexagonal, cubic, and amorphous or vitreous - and depended on the cryosurface temperature. The temperature of the deposit was found to play a strong role in determining the reflectance of any water deposit. From the results obtained in this investigation, important conclusions are drawn with regard to effects on space simulation and component studies in ground test facilities.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1970
- Accession Number
- AD0715915
Entities
People
- A. Matthew Smith
- B. A. Seiber
- Bobby E. Wood
- J. A. Roux
Organizations
- Arnold Engineering Development Complex