Spacecraft particulate contaminant redistributionThis paper describes analyses that were performed in support of the Hubble Space Telescope (HST)) particulate contamination control effort. The specific problems addressed include extension of available particle removal data to launch acoustic and random vibration conditions, development of an engineering model for transport of suspended particulates by airflow and in the presence of vehicle acceleration, turbulent diffusion, and migration of particulates over vibrating surfaces, and integration of the various models into a code that could be used to generate contamination level estimates for the HST primary mirror and other critical surfaces for the HST mission phases. The overall redistribution calculations were made assuming a specified initial contaminant distribution in terms of MIL STD 1246A levels, and using predicted vibration data for the various HST surfaces and mission phases. As expected, the effects of airflow were found to be significant, particularly for the larger particles. Particles smaller than about 20 microns did not participate appreciably in the redistribution.
Document ID
19880054122
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Klavins, A. (Lockheed Missiles and Space Co. Sunnyvale, CA, United States)
Lee, A. L. (Lockheed Missiles and Space Co., Inc. Space Systems Div., Sunnyvale, CA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Spacecraft Design, Testing And Performance
Meeting Information
Meeting: Optical system contamination: Effects, measurement, control