Electromagnetic Wave Propagation in an Annular Electron Beam With Ion Channel Guiding

The dispersion characteristics of electrostatic and electromagnetic modes of an electron tube, with ion channel guiding, in a cylindrical waveguide are presented. The analysis takes into account a relativistic hollow electron beam guided by an ion channel. Dispersion relations are derived and solved...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2011-09, Vol.39 (9), p.1800-1806
Main Authors: Aghamir, F. M., Almasi, H.
Format: Article
Language:English
Subjects:
Annular
Betatron mode
Dispersion
dispersion relation
Dispersions
Electromagnetic scattering
Electromagnetic waveguides
Electromagnetic waves
Electromagnetics
Electron beams
Electron tubes
Electrostatics
Equations
Frequencies
hollow electron beam
ion channel guiding
Ion channels
Magnetic fields
MHD equations
Numerical analysis
Space charge
space charge mode
Vacuum tubes
wave equation
waveguide modes
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Description
Summary:The dispersion characteristics of electrostatic and electromagnetic modes of an electron tube, with ion channel guiding, in a cylindrical waveguide are presented. The analysis takes into account a relativistic hollow electron beam guided by an ion channel. Dispersion relations are derived and solved numerically to study the waveguide, betatron, and space charge modes. The effect of the annular electron beam thickness on frequencies of the electrostatic and electromagnetic waves is investigated. This paper reveals the strong dependence of the electromagnetic and electrostatic waves' frequencies on the electron beam thickness. The results of this paper are compared with previous works where an electron tube is guided with an axial magnetic field.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2011.2160294