Photoelectron Emission From X-Ray Photocathodes Intended For Picosecond Streak Tubes

V. K. Chevokin; A. M. Prokhorov; V. N. Schemelev; M. Ya. Schelev

doi:10.1117/12.967828

1 March 1983 Photoelectron Emission From X-Ray Photocathodes Intended For Picosecond Streak Tubes

V. K. Chevokin, A. M. Prokhorov, V. N. Schemelev, M. Ya. Schelev

Proceedings Volume 0348, 15th Intl Congress on High Speed Photography and Photonics; (1983) https://doi.org/10.1117/12.967828
Event: 15th International Congress on High Speed Photography and Photonics, 1982, San Diego, United States

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.

Citation Download Citation

V. K. Chevokin, A. M. Prokhorov, V. N. Schemelev, and M. Ya. Schelev "Photoelectron Emission From X-Ray Photocathodes Intended For Picosecond Streak Tubes", Proc. SPIE 0348, 15th Intl Congress on High Speed Photography and Photonics, (1 March 1983); https://doi.org/10.1117/12.967828

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