Abstract
Microwave generation by an electron beam in a coaxial transmission line in which the inner and outer conductors are both corrugated is studied theoretically. An annular electron beam propagates in a transport channel filled entirely with plasma. The eigenmodes of the plasma-filled coaxial line are studied, as well as how they are affected by the plasma density. It is shown that, in the presence of a plasma, the microwaves are amplified to a significantly greater extent and the spectrum of the generated microwaves is broader. The nonlinear amplification regime is analyzed. The maximum possible amplitude of the longitudinal electric field and the interaction efficiency are determined as functions of the plasma density. A comparison between the results obtained and the analogous parameters of a vacuum structure shows that plasma-filled hybrid structures are more promising than vacuum sources.
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Translated from Fizika Plazmy, Vol. 27, No. 6, 2001, pp. 509–518.
Original Russian Text Copyright © 2001 by Sotnikov.
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Sotnikov, G.V. Microwave amplification in a coaxial slow-wave plasma transmission line. Plasma Phys. Rep. 27, 480–489 (2001). https://doi.org/10.1134/1.1378125
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DOI: https://doi.org/10.1134/1.1378125