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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 2×1015 photons cm-2 through a 2.5-cm gap maintained at 10-4 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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