Modeling demonstrates improved efficiency and reduced startup time in magnetrons with cathode priming.
A three-dimensional particle-in-cell (PIC) code, CST particle studio is used to examine the output performance of a 10 kW CW S-band magnetron under the effect of DC electric field priming using hollow annular sector cathode. It is found that hollow annular sector cathode enhances the efficiency of magnetron and reduce its startup time. A parametric study is carried out to optimize the cathode annular sector angle. It is found that efficiency is enhanced by 3.92 % and startup time is reduced by 54 % for optimized cathode annular sector angle of 6°. The effect hollow annular sector cathode with conical end hat on magnetron performance is also examined and it is found that it enhances the efficiency by 6.5 %
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Maurya et al. (2026) studied this question.
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