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Proceedings Paper

Bright Photoelectron Beams Emitted From Excimer-Laser Illuminated LaB6
Author(s): Peter E. Oettinger
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Paper Abstract

Lanthanum hexaboride has traditionally been used as a high-temperature thermionic emitter of electrons. This material, whose work function for a sintered multicrystalline composition is nominally 2.6 eV, appears to be a reasonably good photoemitter when irradiated by UV light. A quantum efficiency of 10-3 was recorded for photoemission at a 193 nm (ArF) incident wavelength. At least 20 A/cm2 were observed at 193 nm, 248 nm (KrF) and 308 (XeC1). Beam brightness appears to be a minimum of 4 x 105 A/cm2-rad2 at 248 nm.

Paper Details

Date Published: 16 December 1988
PDF: 6 pages
Proc. SPIE 0998, Excimer Beam Applications, (16 December 1988); doi: 10.1117/12.960205
Show Author Affiliations
Peter E. Oettinger, Thermo Electron Technologies Corporation (United States)

Published in SPIE Proceedings Vol. 0998:
Excimer Beam Applications
Anthony N. Pirri; Bernhard P. Piwczyk, Editor(s)

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