Nonlinear theory of beam excitation of azimuthal surface modes in plasma-filled cylindrical metal waveguides |
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Authors: | V O Girka A M Kondratenko A E Sporov |
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Institution: | (1) Kharkov State University, 310108 Kharkov, Ukraine;(2) Scientific-Technological Center of Electrophysics, National Academy of Sciences of Ukraine, 310002 Kharkov, Ukraine |
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Abstract: | It is shown that electromagnetic surface waves propagating along the azimuthal angle can be excited efficiently by an annular
electron beam in a cylindrical metal waveguide partially filled with a magnetoactive plasma. A self-consistent system of differential
equations is obtained to describe the nonlinear interaction between the beam particles and an azimuthal surface wave in the
single-mode regime. This system of equations is analyzed numerically and the influence of the parameters of this waveguide
structure on the development of the resonant beam instability is determined.
Zh. Tekh. Fiz. 69, 84–88 (July 1999) |
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