Backward wave oscillator

The simulation results of multi­segment permanent magnet magnetic focusing system for clinotrons in submillimeter range have been presented. The visualization of magnetic field distribution in the gap between the system magnetic poles was done with the help of computer simulations. The simulation results are compared with those obtained experimentally. The magnetic field distribution curves of both single segment and whole multi­segment magnetic system are presented.

The regime of the simultaneous existence of space and surface waves in the O-type oscillator with a periodically inhomogeneous comb has been considered. The impedance and quality factor dependences for space waves, surface waves and hybrid mode have been compared.