A high power microwave radial klystron oscillator with foldaway concentric cylinder resonant cavity
Based on the 1D single electron theory of the interaction between the electron and microwave, the generation and the oscillation of microwave in the foldaway concentric cylinders resonant cavity are analyzed. Employing a 2.5D PIC code, A radial klystron oscillator with foldaway concentric cylinders resonant cavity is simulated numerically. With a 380kV and 18kA electron beam, a peak value power of 1GW,1.52GHz output microwave is generated by simulation. As the electron beam is strongly nonlinearly modulated by the microwave in the cavity, the output microwave has harmonic components of different frequency.