Share Email Print
cover

Proceedings Paper

General sticking coefficient theory for neutral and photochemically excited molecules
Author(s): Michael C. Fong
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

This paper discuses a general sticking coefficient theory for both neutral molecules and photochemically excited molecules in a solar vacuum UV (VUV) radiation environment. For neutral-molecule problems, the theory is based on the classical adsorption kinetics concept for either a single- component or multi-component gas on a surface with a constant incident flux. The theory has been verified satisfactorily with available DC-704 test data. For photochemically induced adsorption problems, a sticking coefficient model modified from that in the literature is proposed. This model asserts that photochemical reactions can take place only if the neutral-molecule residence time is longer than the photoexcitation dwell time. The total sticking coefficient is the sum of the neutral-molecule sticking coefficient and the photoexcited-molecule sticking coefficient. The photochemically induced deposition enhancement predicted by the present theory shows reasonable agreement with data presented in the literature.

Paper Details

Date Published: 27 October 1998
PDF: 12 pages
Proc. SPIE 3427, Optical Systems Contamination and Degradation, (27 October 1998); doi: 10.1117/12.328496
Show Author Affiliations
Michael C. Fong, Lockheed Martin Missiles & Space (United States)


Published in SPIE Proceedings Vol. 3427:
Optical Systems Contamination and Degradation
Philip T. C. Chen; William E. McClintock; Gary J. Rottman, Editor(s)

© SPIE. Terms of Use
Back to Top