Abstract
In this paper, a low-voltage second harmonic gyrotron oscillator with the conventional cavity has been preliminarily designed and evaluated with the self-consistent nonlinear code and the particle-in-cell code CHIPIC. The Ka-band gyrotron oscillator is driven by the 25-kV 5.0-A electron beam from a magnetron injection gun. The output power of 35-kW continuous wave (CW) is obtained in the designed gyrotron and the electronic efficiency is about 30%.
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