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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 55, Iss. 9 — Sep. 1, 1965
  • pp: 1078–1080

Transmission Diminution of Vacuum-Ultraviolet Lamp Windows

R. G. TAYLOR, T. A. CHUBB, and R. W. KREPLIN  »View Author Affiliations


JOSA, Vol. 55, Issue 9, pp. 1078-1080 (1965)
http://dx.doi.org/10.1364/JOSA.55.001078


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Abstract

Passage of far-ultraviolet radiation (1050-2000 Å) through the imperfect vacuum maintained by mechanical and oil-diffusion pumps results in the buildup of films opaque to far-uv radiation. Such films quickly coat lamp windows and other optical surfaces. The films can be removed by washing with petroleum ether or by exposure of affected surfaces to a hydrogen gas discharge. Transmittance vs time studies support the view that the films are produced from photodissociated vacuum-pump oil molecules. Passage of 2×10<sup>15</sup> photons cm<sup>-2</sup> through a 2.5-cm gap maintained at 10<sup>-4</sup> Torr pressure results in two films of 50% combined transmittance measured at about 1200 Å.

Citation
R. G. TAYLOR, T. A. CHUBB, and R. W. KREPLIN, "Transmission Diminution of Vacuum-Ultraviolet Lamp Windows," J. Opt. Soc. Am. 55, 1078-1080 (1965)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-55-9-1078


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References

  1. Frederic Palmer, Jr., J. Chem. Phys. 2, 292 (1934).
  2. P. Warneck, Appl. Opt. 1, 721, (1962).
  3. J. M. Young, U. S. Naval Research Laboratory, Washington, D. C. (private communication).

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