High current density small divergence electron beam production by laser-induced various-order multiphoton photoeffect

Gyozo Farkas; Csaba Toth

doi:10.1117/12.145285

1 October 1993 High current density small divergence electron beam production by laser-induced various-order multiphoton photoeffect

Gyozo Farkas, Csaba Toth

Author Affiliations +

Optical Engineering, Vol. 32, Issue 10, (October 1993). https://doi.org/10.1117/12.145285

Abstract

The relative roles of (1) surface and volume type photoelectric effects, (2) slow and fast laser-induced thermionic electron emission, and (3) optical tunnel emission are discussed from the point of view of the production possibilities of efficient high current density, small divergency electron beams. Angular distribution of photoelectrons emitted from gold target surface by high-intensity pulsed laser radiation at wavelengths of 1060, 343, and 248 nm for the s and p polarization of the grazing incident radiation are investigated experimentally. For the longer wavelengths, where the order of the multiphoton photoelectric emission increases, the ratio of the yields of the surface photoeffect and of the volume photoeffect also increases. The comparative advantages of the surface multiphoton photoeffect of metals as a promising method for the realization of small emittance, high brightness, high current density electron sources are pointed out.

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Gyozo Farkas and Csaba Toth "High current density small divergence electron beam production by laser-induced various-order multiphoton photoeffect," Optical Engineering 32(10), (1 October 1993). https://doi.org/10.1117/12.145285

Published: 1 October 1993

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