We present the concept of creating sources of gigawatt-level powers in the subterahertz and terahertz frequency ranges, which are based on excitation of high-Q cavities by high-current relativistic electron beams. In order to ensure selective generation in a cavity with a great oversize parameter, we propose to use a high-Q supermode formed by a set of partial eigenmodes of the system. The results of theoretical analysis and numerical modeling are presented both for the “cold” problem (finding the supermode structure in the absence of the beam), and for the “hot” one, where the supermode is excited by an electron beam of small “seed” noises having a random spatiotemporal structure.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 65, No. 3, pp. 184–197, January 2022. Russian DOI:https://doi.org/10.52452/00213462_2022_65_03_184
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Oparina, Y.S., Peskov, N.Y., Savilov, A.V. et al. Excitation of High-Q Talbot-Type Supermodes in Oversized Cavities of High-Power Electron Masers. Radiophys Quantum El 65, 170–182 (2022). https://doi.org/10.1007/s11141-023-10203-9
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DOI: https://doi.org/10.1007/s11141-023-10203-9