Sosnytskiy S. Theory of the spatial-harmonic magnetrons with cold secondary-emission cathodes.

The dissertation has been devoted to the theoretical investigation of electron-wave interaction in the spatial-harmonic magnetrons with cold secondary-emission cathodes. Particle simulation has been used as the main technique of investigation. The proposed mathematical model of the spatial-harmonic magnetrons with cold secondary-emission cathodes takes into account for two-dimensional electrons’ movement in crossed fields, presence of the spatial charge, interaction of electrons with the oscillatory circuit, and secondary emission on the cold cathode. It has been shown that this type of magnetrons has a series of peculiarities which are not proper to classical magnetrons. They are: non-periodical spatial charge; essential influence of a non-synchronous spatial harmonic on the process of the oscillations generation; possibility of the multistability existence; excitation of both components of the doublet oscillation type; multiple stage spatial charge formation.