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Initial stage of interaction between gyrating relativistic electron beam and long-wavelength electromagnetic surface waves in cylindrical metallic waveguides partially filled with plasma

Girka, I. O.; Girka, O. I.; Thumm, M.

Abstract (englisch):
Azimuthal surface waves are eigen electromagnetic waves of cylindrical metallic waveguides with plasma filling. Azimuthal surface waves of extraordinary polarization are known to be effectively excited by a beam of electrons gyrating in an axial external static magnetic field along large Larmor radii around the plasma column. Beam excitation of azimuthal surface waves was well studied theoretically in both linear and nonlinear approaches. An important limitation of the earlier studies was the approximation of zero axial wavenumber. In the present paper, perturbation theory is applied to account for finite magnitude of the axial wavenumber of electromagnetic surface waves in studying their excitation by an electron beam. The dependence of the wave growth rate on the axial wavenumber and parameters of the plasma waveguide is studied. The results obtained in this paper are of interest for application in plasma electronics.

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Verlagsausgabe §
DOI: 10.5445/IR/1000094328
Frei zugänglich ab 23.04.2020
Zugehörige Institution(en) am KIT Institut für Hochfrequenztechnik und Elektronik (IHE)
Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 1070-664X, 1089-7674
KITopen-ID: 1000094328
HGF-Programm 31.03.02 (POF III, LK 01)
Erschienen in Physics of plasmas
Band 26
Seiten 042118
Vorab online veröffentlicht am 22.04.2019
Nachgewiesen in Scopus
Web of Science
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