Kamal B. Influence of thermal processes on stability of oscillations frequency in multi-resonators magnetron self-excited oscillators

The aim - determination of physical mechanisms of the influence of heat loss processes on frequency properties of magnetron self-excited oscillators under conditions of continuous variations of a cathode emission activity. Object - process of interaction between a reentrant electron beam and an electromagnetic field of a circular anodic resonance system taking into account heat losses on a cathode and anode. Methods - microscopic electromagnetic field theory, particle-in-cell method, Hockney's method with fast Fourier transform. Results - a 2- D multiperiodical mathematical model of a magnetron self-excited oscillator has been developed taking into account influencing of processes of heat loss on a cathode and anode; an analytical thermal model of the 'cathode- anode' system of a magnetron self-excited oscillator has been developed for the purpose of its use as part of a 2- D multiperiodical mathematical model of a magnetron. Implementation - in upgrading and replacement of thermionic cathodes with field radiating cathodes and use of magnetrons as basic frequency generators of different radio electronic means. Application - development of microwave emission sources based on magnetrons