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Proceedings Paper

Negative electron affinity photocathodes as high-performance electron sources-Part 2: Energy spectrum measurements
Author(s): Aaron W. Baum; William E. Spicer; Roger Fabian W. Pease; Kenneth A. Costello; Verle W. Aebi
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Paper Abstract

The energy spectra of electrons emitted from transmission-mode negative electron affinity photocathodes have been measured at high resolution using a parllel-plate retarding technique. The spectra from GaAs photocathodes have a basic structure that varies with temperature, activation layer qualitites, cathode thickness, and illuminating wavelength. A FWHM energy spread of approximately 50meV at room temperature has been achieved. Spectra from a GaAsP cathode show a markedly different structure and a much wider energy spread.

Paper Details

Date Published: 26 September 1995
PDF: 8 pages
Proc. SPIE 2550, Photodetectors and Power Meters II, (26 September 1995); doi: 10.1117/12.221430
Show Author Affiliations
Aaron W. Baum, Stanford Univ. (United States)
William E. Spicer, Stanford Univ. (United States)
Roger Fabian W. Pease, Stanford Univ. (United States)
Kenneth A. Costello, INTEVAC (United States)
Verle W. Aebi, INTEVAC (United States)


Published in SPIE Proceedings Vol. 2550:
Photodetectors and Power Meters II
Kathleen Muray; Kenneth J. Kaufmann, Editor(s)

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