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Information × Registration Number 0219U000776, 0117U001668 , R & D reports Title Optimization of cylindrical cavity with distributed longitudinal corrugations for second-harmonic terahertz gyrotron popup.stage_title Head Shcherbinin Vitalii Igorovych, Registration Date 25-02-2019 Organization National Science Center "Kharkiv Institute of Physics & Technology" popup.description2 A nonlinear stationary theory of the interaction of a beam with electromagnetic modes in the cavity with distributed longitudinal corrugations for the gyrotron at the second cyclotron harmonic was developed in order to determine the starting currents of the cavity modes and the gyrotron efficiency. As a numerical example, we considered a cavity for a 0.4-THz gyrotron with an efficiency of 22% and a power of 97 kW. The corrugations in the cavity were applied to the input section and part of the central section. The depth of the corrugations was chosen so that they had a minimal effect on the chosen working mode of the gyrotron. It is shown that, in contrast to the working mode, the fundamental competing modes experience a significant reflection from the selected inhomogeneity of the corrugations distribution. It has been established that the starting currents of such modes, herewith, increase significantly. It is determined that this increase may be more than 1000%, depending on the corrugations distribution. Product Description popup.authors Ткачова Тетяна Іванівна Щербінін Віталій Ігорович popup.nrat_date 2020-04-02 Close