Photodeposition of molecular contaminants with a vacuum ultraviolet solar illumination lamp

Mark E. Frink; Mark A. Folkman; Lane A. Darnton

doi:10.1117/12.140751

18 December 1992 Photodeposition of molecular contaminants with a vacuum ultraviolet solar illumination lamp

Mark E. Frink, Mark A. Folkman, Lane A. Darnton

Proceedings Volume 1754, Optical System Contamination: Effects, Measurement, Control III; (1992) https://doi.org/10.1117/12.140751
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Several molecular species (hydrocarbons) outgassed from spacecraft materials adhere and darken on satellite optical surfaces when exposed to solar ultraviolet (UV) radiation. This absorbing molecular film of photolyzed contamination can severely degrade spacecraft optical system performance. In the Optical Scatter and Contamination Effects Facility (OSCEF) at TRW outgassed molecular species can be photo-deposited onto witness optics and an adjacent quartz crystal microbalance with vacuum ultraviolet radiation, simulating a spacecraft UV illuminated environment. Measurement of outgassing rates and concomitant photodeposition efficiencies provides useful data required in the selection of present and new spacecraft materials and accurate predictions of platform operating lifetimes. This paper will describe the methods used to measure the molecular outgassing and photodeposition rates of species from several spacecraft materials in which the samples are used in their operational configurations (no heating or grinding of the sample as in the ASTM E595 test), thus providing data highly representative of on-orbit photodeposition conditions.

Citation Download Citation

Mark E. Frink, Mark A. Folkman, and Lane A. Darnton "Photodeposition of molecular contaminants with a vacuum ultraviolet solar illumination lamp", Proc. SPIE 1754, Optical System Contamination: Effects, Measurement, Control III, (18 December 1992); https://doi.org/10.1117/12.140751

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available