Abstract

The effects of thin, polymer contaminant films on the reflectance and scattered light properties of far ultraviolet reflecting mirrors were studied. Deposition of the contaminant films was induced by irradiating the mirrors with 10-keV protons in a high vacuum environment containing hydrocarbon molecules. Contaminant films were deposited using integrated fluxes up to 1016 protons-cm−2, and a flux of about 1.4 × 1011 protons-cm−2 sec−1. Contaminant film effects were studied on mirror coatings of evaporated aluminum coated with MgF2, aluminum coated with LiF, and platinum. Results of experiments showed that a film as thin as 4–5 nm produced large reflectance degradation in selected wavelength bands as a result of interference-type effects. Radiation-induced degradation of MgF2, LiF, and Al film was shown to be negligible. An oxidation cleaning technique was developed that successfully removed the contaminant film and restored reflectance to nearly preirradiation values.

© 1971 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Further Studies on MgF2-Overcoated Aluminum Mirrors with Highest Reflectance in the Vacuum Ultraviolet

L. R. Canfield, G. Hass, and J. E. Waylonis
Appl. Opt. 5(1) 45-50 (1966)

Preparation of Mirror Coatings for the Vacuum Ultraviolet in a 2-m Evaporator

A. P. Bradford, G. Hass, J. F. Osantowski, and A. R. Toft
Appl. Opt. 8(6) 1183-1189 (1969)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription