Kuleshov O. New regimes of autooscillations in low-voltage frequencytunable vacuum electron devices of mm and submm ranges

The purpose of the dissertation work is to determine new regimes of generation in compact low-voltage vacuum electron devices of millimeter and submillimeter ranges in order to increase the efficiency of beam-wave interaction. The object of the research is the processes of a formation and transportation of low-voltage intense electron beams of various configurations, as well as the processes of their interaction with electromagnetic waves in vacuum electron devices of millimeter and submillimeter ranges. Research methods: Runge - Kutta method, mode matching technique, method of decomposition. Theoretical and practical results: low-voltage effective operation of cyclotron resonance masers with frequency tuning is shown, as well as new regimes of beam-wave interaction in clinotrons of millimeter and submillimeter ranges. Novelty: new regimes of operation of low-voltage vacuum electron devices of millimeter and submillimeter ranges with increased efficiency and stability are obtained. Implementation: The results of the work can be used in the preparation and presentation of educational lectures in high educational institutions of the Ministry of Education and Science of Ukraine, which studies the scientific field of physical electronics and physics of charged particle beams. Scope: research results can be used in physical electronics, spectroscopy of medical and biological objects.