Oscillator-tapered amplifier tube operated at low magnetic field

A high power slow-wave source operated at low magnetic field is designed. A Cerenkov oscillator is connected to a tapered amplifier by a resonant cavity in the new device. The electron beam current is effectively used to yield microwave with high efficiency. The results of the primary experimental study of the new high power microwave source are reported. At the beam parameters of 450 kV, 2.3 kA, and peak magnetic field of 0.6 T, an output microwave power of 230 MW and efficiency of 23% are achieved, and the mode is a typical TM01 with the main frequency of 10.33 GHz. The measured microwave power and mode are in accordance with those simulated under the same condition.