E. Khutoryan, S. Vlasenko, A. Kuleshov, S. Ponomarenko, K. Lukin, Y. Tatematsu, M. Tani
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Hybrid Bulk-Surface Modes Excited in the THz Cherenkov Oscillator with the Double Grating
The operation of the THz Cherenkov vacuum electron devices with nonuniform double gratings supporting the hybrid bulk-surface modes has been considered for an increase of a thickness of a sheet electron beam and its coupling with RF field. It is shown that advantages of a double grating configuration may comprise the increase of up to 3 times of a coupling impedance as well as a widening of the operation frequency range in comparison with the single grating configuration.
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