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Proceedings Paper

Photoelectron Emission From X-Ray Photocathodes Intended For Picosecond Streak Tubes
Author(s): V. K. Chevokin; A. M. Prokhorov; V. N. Schemelev; M. Ya. Schelev
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Paper Abstract

It is shown that various metallic-type photocathodes when irradiated by soft X-ray emis-sion in the 1-10R energy range, have the energy distribution of secondary-emission photoelectrons only in the range of 4-7 eV(FWHM). The latter value for dielectric-type photocathodes (KC1 and NaCl) is even less and lies in the region between 1.5-2.5 eV. Furthermore, the quantum efficiency of these, dielectric-type photocathodes is almost five times higher than for the metallic ones in the same spectral range. Taking into account the rejection of pho-toelectrons with energy higher than 50 eV (although the "tail" in photoelectrons energy distribution spreads up to several keV) in image formation process, one can conclude that application of dielectric-type photocathodes for picosecond X-ray treak tubes looks very promising.

Paper Details

Date Published: 1 March 1983
PDF: 6 pages
Proc. SPIE 0348, 15th Intl Congress on High Speed Photography and Photonics, (1 March 1983); doi: 10.1117/12.967828
Show Author Affiliations
V. K. Chevokin, USSR Academy of Sciences (Germany)
A. M. Prokhorov, USSR Academy of Sciences (Germany)
V. N. Schemelev, USSR Academy of Sciences (Germany)
M. Ya. Schelev, USSR Academy of Sciences (Germany)

Published in SPIE Proceedings Vol. 0348:
15th Intl Congress on High Speed Photography and Photonics
Lincoln L. Endelman, Editor(s)

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