Pulse Lengthening of the Microwave Generated by TM₀₂ Mode Ka -Band RBWO Operating With Low Guiding Magnetic Field

The TM02 mode has advantage in power capacity over the fundamental TM01 mode in relativistic backward-wave oscillator (RBWO), whereas in our formal experiment, the microwave pulse seemed not as wide as we expected. In this article, the power capacity of the TM02 mode is investigated theoretically and the mechanisms corresponding to the pulse shortening are analyzed in detail. It is found that the ...