Grazing incidence absorption measurements. Final report [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Defense, 1989.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- 14 pages : digital, PDF file
- Additional Creators
- Los Alamos National Laboratory, United States. Department of Defense, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- This final report summarizes the results of a series of different measurements to characterize various mirrors of interest to Los Alamos National Laboratory and the Boeing Aerospace free electron laser program. Most of the measurements were of the glancing incidence characteristics of different overcoated silver mirrors. These included the absolute absorptance as a function of angle of incidence (0--88°), laser wavelength (0.5145 and 1.06 μm), polarization, and exposure to room air. The latter measurement examined the ability of the overcoated silver mirrors to resist tarnishing. Overcoating materials used were single-layer ThF₄ and MgF₂, a very thin layer of Al₂O₃, and diamond. As a result of the work performed during this program, significant progress has been made to find a better alternative to bare silver mirrors for high-power laser applications. Thick dielectric overcoats do protect the silver mirrors from tarnishing, but problems associated with accurately controlling the optical constants of the dielectric during the coating process appear to make it difficult to achieve the desired optical properties of the mirrors at high angles of incidence.
- Report Numbers
- E 1.99:la-sub--93-292
la-sub--93-292 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
07/31/1989.
"la-sub--93-292"
"DE94001472" - Type of Report and Period Covered Note
- Final; 07/01/1989 - 07/01/1989
- Funding Information
- W-7405-ENG-36
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