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Information × Registration Number 0218U002581, 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 24-04-2018 Organization National Science Center "Kharkiv Institute of Physics & Technology" popup.description2 Cold (beam-absent) electromagnetic analysis is presented for cylindrical cavity with longitudinal wall corrugations used to suppress selectively fundamental parasitic modes in gyrotron operated at the second cyclotron harmonic. As examples, selective properties of two cylindrical corrugated cavities for 0.4-THz second-harmonic gyrotron are investigated. It is shown that in the first cavity, which features increased length and uniform corrugations, ohmic losses (and oscillation thresholds) of the fundamental parasitic modes can be increased several times in comparison with those for operating mode. For the second cavity of reduced length, we determine optimal longitudinal distribution and form of corrugations, which provide more than 30-fold decrease in diffractive losses (and oscillation threshold) for the operating mode with respect to analogous values for the fundamental parasitic modes. Product Description popup.authors Глущенко Антон В'ячеславович Максименко Олександр Володимирович Ткачова Тетяна Іванівна Щербінін Віталій Ігорович popup.nrat_date 2020-04-02 Close