Computer simulations of coaxial vircators

Kevin S. Woolverton; Magne Kristiansen; Lynn L. Hatfield

doi:10.1117/12.284009

3 October 1997 Computer simulations of coaxial vircators

Kevin S. Woolverton, Magne Kristiansen, Lynn L. Hatfield

Proceedings Volume 3158, Intense Microwave Pulses V; (1997) https://doi.org/10.1117/12.284009
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

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.

Citation Download Citation

Kevin S. Woolverton, Magne Kristiansen, and Lynn L. Hatfield "Computer simulations of coaxial vircators", Proc. SPIE 3158, Intense Microwave Pulses V, (3 October 1997); https://doi.org/10.1117/12.284009

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