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Low inertial transition of the field emission into explosive electrons emission at the cathode and related fast-rise-time electron beam formation are of interest in a phase-stable excitation of relativistic high-power microwave oscillators. We present experiments on the cathode activation using emission initiation during specially prepared advance voltage pulse (prepulse) possessing variable amplitude...
A study of a 38-GHz nonstationary relativistic BWO operating with an impulse solenoid has been performed. The production of subnanosecond pulsed microwaves with a peak power of ~500 MW with this BWO was carried out experimentally and using a PIC simulation. It has been shown that the topology and magnitude of the magnetic field best suited to focus the electron beam can be provided by a magnetic focusing...
Two versions of modernized experimental setup (i.e., nonstationary relativistic X-band BWO) were used for the generation of subnanoseeond-width, gigawatt-range pulses of microwave superradiation (SR).
Summary form only given. Investigation results of highly effective energy exchange between electron beam and electromagnetic wave in nonstationary, superradiative Ka-band BWO (SR BWO) under conditions of beam transportation in decreased (less than the cyclotron-resonance value) magnetic field of ~ 2 T are presented. In our previous studies with such conditions the conversion of e-beam power into SR...
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