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Proceedings Paper

Photoelectron energy spectra of opaque photocathodes in the extreme and far ultraviolet
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Paper Abstract

Measurements of the EUV quantum detection efficiency (QDE) of opaque RbBr, CsBr, and KBr photocathodes are described and investigations of their photoemission characteristics over the 44-1560 A wavelength range are reported. The results show that high QDEs can be obtained in the EUV. Narrow QDE peaks at soft X-ray wavelengths occur at slightly different wavelengths for each of the materials studied. The long-wavelength thresholds vary according to the material band gap. Data on the photoemission from the photocathode layer on the microchannel plate interchannel web area are used to determine the number and energy distribution of the emitted photoelelectrons as a function of wavelength.

Paper Details

Date Published: 1 November 1990
PDF: 11 pages
Proc. SPIE 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy, (1 November 1990); doi: 10.1117/12.23243
Show Author Affiliations
Oswald H. W. Siegmund, Univ. of California/Berkeley (United States)
Geoffrey A. Gaines, Univ. of California/Berkeley (United States)

Published in SPIE Proceedings Vol. 1344:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy
Oswald H. W. Siegmund; Hugh S. Hudson, Editor(s)

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