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Proceedings Paper

Surface Production Of Negative Hydrogen Ions
Author(s): M. Seidl; W. E. Carr; S. T. Melnychuk; A. E. Souzis; J. Isenberg; H. Huang
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Paper Abstract

Negative hydrogen ions are produced by electron tunnelling from a solid surface (converter) to hydrogen atoms moving away from the surface. A simple theoretical model of this process indicates reasonable ionization probability (>0.1) for low initial energy of the H atoms (order of 1 eV) when the work function of the converter is smaller than 1.5 eV. Low initial energy guarantees low H- ion energy spread. It also makes it possible to use a variety of compounds for reducing the converter work function. Experimental studies of Cs oxide films (work function 0.9 to 1.2 eV) are presented. Production of H- ions by backscattering thermally produced H atoms from a thick film of Cs oxide is demonstrated.

Paper Details

Date Published: 25 July 1989
PDF: 8 pages
Proc. SPIE 1061, Microwave and Particle Beam Sources and Directed Energy Concepts, (25 July 1989); doi: 10.1117/12.951839
Show Author Affiliations
M. Seidl, Stevens Institute of Technology (United States)
W. E. Carr, Stevens Institute of Technology (United States)
S. T. Melnychuk, Stevens Institute of Technology (United States)
A. E. Souzis, Stevens Institute of Technology (United States)
J. Isenberg, Stevens Institute of Technology (United States)
H. Huang, Stevens Institute of Technology (United States)


Published in SPIE Proceedings Vol. 1061:
Microwave and Particle Beam Sources and Directed Energy Concepts
Howard E. Brandt, Editor(s)

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