The nonuniform-phase-velocity relativista BWO

The possibility of increasing the efficiency of a carcinotron by varying the phase velocity of the -1th space harmonic in the class of single-step functions has been studied both numerically and experimentally. The numerical simulation has shown that increasing the phase velocity along the interaction space improves the phase relationships between the HF current and electromagnetic field and increases the efficiency of energy exchange to 70 %. In the experiment carried out on the SINUS-K electron accelerator, a nonuniform-phase-velocity BWO operating with an efficiency of 45 % and microwave pulse power of 500 MW has been realised.