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Proceedings Paper

Emission models for thermionic cathodes
Author(s): David C. Carpenter; John Simkin
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Paper Abstract

Accurate computer simulations of electron guns based on finite element methods for electrostatic field calculation are described. Discrete and semi analytic models for thermionic cathode emission currents are presented, the initial conditions used for the electrons at the cathode are discussed and the affects of different approximations are analyzed for an axisymmetric triode electron gun. Results from models that use local one dimensional approximations are compared to a full discrete simulation.

Paper Details

Date Published: 25 September 1997
PDF: 7 pages
Proc. SPIE 3155, Charged Particle Optics III, (25 September 1997); doi: 10.1117/12.279397
Show Author Affiliations
David C. Carpenter, Vector Fields Inc. (United States)
John Simkin, Vector Fields Ltd. (United Kingdom)


Published in SPIE Proceedings Vol. 3155:
Charged Particle Optics III
Eric Munro, Editor(s)

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