Accession Number:

ADA010459

Title:

Effects of Ion Beam Polishing on Alkali Halide Laser Window Materials,

Descriptive Note:

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MASS

Personal Author(s):

• Bruce,J. A.
• Comer,J. J.
• Collins,C. V.
• Lipson,H. G.

Report Date:

1975-05-07

Pagination or Media Count:

15.0

Abstract:

Samples of single crystal KCl, KCl-KBr, and polycrystalline pressure-induced recrystallized KCl were polished using an argon ion beam. The specimens were rotated at a constant rate during bombardment. The angle-of-incidence of the ion beam, the ion current, and the time of sample exposure were varied. After polishing the surfaces of the samples were examined by x-ray topography, scanning electron microscopy, transmission electron microscopy, and Nomarski techniques and the absorption coefficient of the materials was measured. The effects of different polishing rates and angles-of-incidence on surface quality and absorption characteristics of the selected alkali halide laser window materials are discussed.

Descriptors:

• *SURFACE FINISHING
• *INFRARED OPTICAL MATERIALS
• *LASER MATERIALS
• *INFRARED WINDOWS
• ION BEAMS
• X RAYS
• ELECTRON MICROSCOPY
• ABSORPTION
• POTASSIUM CHLORIDE
• ARGON
• AUGER ELECTRON SPECTROSCOPY
• BROMIDES
• POTASSIUM COMPOUNDS

Subject Categories:

• Lasers and Masers
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE