EXCITATION OF AZIMUTHAL EIGEN MODES BY MODULATED ANNULAR ELECTRON BEAM | Zendy

V. O. Girka | Zendy; S Yu Puzyrkov | Zendy; O. Nefodov | Zendy

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EXCITATION OF AZIMUTHAL EIGEN MODES BY MODULATED ANNULAR ELECTRON BEAM

Author(s) -

V. O. Girka,

S Yu Puzyrkov,

O. Nefodov

Publication year - 2013

Publication title -

progress in electromagnetics research b

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.208

H-Index - 47

ISSN - 1937-6472

DOI - 10.2528/pierb12092002

Subject(s) - azimuth , physics , instability , beam (structure) , excitation , cathode ray , electron , atomic physics , modulation (music) , range (aeronautics) , plasma , computational physics , optics , materials science , mechanics , quantum mechanics , acoustics , composite material

Excitation of extraordinarily polarized azimuthal eigen modes by modulated annular electron beam is shown to be characterized by the increase of instability growth rates compared with the case of non-modulated electron beam. Interaction between the modulated beam and azimuthal eigen modes happens in the range of electron cyclotron frequency in waveguides with metal walls, which are partially fllled with cold magneto-active plasma. Non- linear set of difierential equations, which describs excitation of these azimuthal modes by an annular electron beam is derived and analyzed numerically. Difierent scenarios of the beam-plasma interaction depending on relation between azimuthal mode number of the exited waves and periodicity of azimuthal modulation of the beam density, degree and manner of the beams' modulation are studied numerically.

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