Assessment of contamination in the Shuttle bayThe results of an analytical study to determine the contamination potential of the Galileo probe instruments while in the STS bay are presented. The study covered conditions wherein the instruments weren't covered, covers were used with vent paths of varying sizes, and if the instruments were sealed and a nitrogen purge was employed. The contamination limits for each of the Galileo instruments are considered. Analytic approximations are devised for the diffusion of particles from surfaces and materials in the Shuttle bay during the ascent phase, using Fick's second law of diffusion. It is recommended that an instrument purge be implemented during the first 15 min of Shuttle flight in order to carry the contaminants from both the bay fixtures and from the instruments into space. Covers are suggested as necessary for the most sensitive instruments.
Document ID
19830032528
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Jeffery, J. A. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Maag, C. R. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Seastrom, J. W. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Weber, M. F. (Toronto, University Toronto, Canada)