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Proceedings Paper

Computer simulations of coaxial vircators
Author(s): Kevin S. Woolverton; Magne Kristiansen; Lynn L. Hatfield
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Paper Abstract

A study of the efficiency of a coaxial virtual cathode oscillator is presented. The coaxial geometry has many physical parameters that can be changed to alter performance. The parameters of interest include the placement of a ring cut in the anode base and the polarity of the system. The ring creates a decelerating field for the electrons and tends to keep them in the right-phased region of the virtual cathode. The ring is varied in width and in position from the center line with the results normalized to the no ring geometry. The results for a positively and negatively pulsed system are also given. Comparisons of frequency, efficiency, and particle dynamics of the positively and negatively pulsed systems are given. MAGIC, a 2-1/2 dimensional particle-in-cell code, and SOS, a 3 dimensional particle-in-cell code, are used to simulate the different geometries.

Paper Details

Date Published: 3 October 1997
PDF: 8 pages
Proc. SPIE 3158, Intense Microwave Pulses V, (3 October 1997); doi: 10.1117/12.284009
Show Author Affiliations
Kevin S. Woolverton, Texas Tech Univ. (United States)
Magne Kristiansen, Texas Tech Univ. (United States)
Lynn L. Hatfield, Texas Tech Univ. (United States)

Published in SPIE Proceedings Vol. 3158:
Intense Microwave Pulses V
Howard E. Brandt, Editor(s)

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