Spacecraft Particulate Contaminant Redistribution

A. Klavins; A. L. Lee

doi:10.1117/12.967084

1 January 1987 Spacecraft Particulate Contaminant Redistribution

A. Klavins, A. L. Lee

Proceedings Volume 0777, Optical Systems Contamination: Effects, Measurement, Control; (1987) https://doi.org/10.1117/12.967084
Event: 1987 Technical Symposium Southeast on Optics, Electro-Optics, and Sensors, 1987, Orlando, FL, United States

Abstract

This 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 1246Å 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.

Citation Download Citation

A. Klavins and A. L. Lee "Spacecraft Particulate Contaminant Redistribution", Proc. SPIE 0777, Optical Systems Contamination: Effects, Measurement, Control, (1 January 1987); https://doi.org/10.1117/12.967084

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