Abstract
A theoretical and experimental study of spatial and temporal current oscillations in a magnetron injection gun is presented. Basic features of the device operation are ascertained. Complicated system dynamics, namely transitions from regular to chaotic oscillations in response to changing the system parameters, is revealed. The conclusions are drawn based on the analysis of the computed electron trajectories and output-current waveforms and spectra. Experimentally, the spectra of the beam-current oscillations, noise-intensity spectral density, etc., are obtained. Strong broadband microwave oscillations of the output current are observed for a wide range of the lengths of the emitting and the nonemitting portions of the cathode.
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