3D simulation of flat-cathode electron guns with space charge

John A. Rouse; Xieqing Zhu; Eric Munro; Haoning Liu; Warren K. Waskiewicz; Victor Katsap

doi:10.1117/12.370116

15 November 1999 3D simulation of flat-cathode electron guns with space charge

John A. Rouse, Xieqing Zhu, Eric Munro, Haoning Liu, Warren K. Waskiewicz, Victor Katsap

Proceedings Volume 3777, Charged Particle Optics IV; (1999) https://doi.org/10.1117/12.370116
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Simulation software has been written to calculate the properties of electron guns which have flat cathodes and a fully three-dimensional electrode structure. Volumetric space charge effects are significant in such guns and a three- dimensional solution of Poisson's equation is required. This, in turn, requires a simulation of the cathode and its emission properties, a three-dimensional electrostatic potential calculation and a direct ray trace of charged particles through the gun. The motivation for this work was to have software tools to enable the analysis and design of flat cathode guns, for example, guns for cathode ray tubes (CRTs) and a suitable source for the SCALPEL projection lithography column. CRT guns usually have three cathodes and non-circular apertures in the electrodes. A proposed design for the SCALPEL gun has a large-area flat cathode with a fine grid parallel to the cathode and just in front of it. The techniques used in the software are presented and described and the capabilities of the software are illustrated by the analysis of some flat cathode guns.

Citation Download Citation

John A. Rouse, Xieqing Zhu, Eric Munro, Haoning Liu, Warren K. Waskiewicz, and Victor Katsap "3D simulation of flat-cathode electron guns with space charge", Proc. SPIE 3777, Charged Particle Optics IV, (15 November 1999); https://doi.org/10.1117/12.370116

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