Abstract
A high-efficiency relativistic microwave source based on a backward wave oscillator (BWO) with a resonance reflector has been studied by experimental and numerical methods. The BWO is capable of generating 12-ns pulses with a carrier frequency of 9.93 GHz at an output radiation power of 0.75 ± 0.11 GW. For the BWO pumped by a high-current electron beam from a SINUS-6K accelerator, the regime with relatively high pulse-to-pulse stability is characterized by a 40% efficiency of power conversion.
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