THE THEORETICAL INVESTIGATION OF THz ELECTROMAGNETIC WAVES IN A ROD DEGENERATE PLASMA-WAVEGUIDE |
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| Authors: | B Jazi M Nejati and A Salehi |
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| Institution: | (1) Physics Department, Kashan University, Blvd. Ravand, Kashan, Iran;(2) Physics Department, Islamic Azad University of Qom, Qom, Iran |
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| Abstract: | By using the Fourier components of dielectric tensor elements of cold collisionless degenerate plasmas, the dispersion relation
of electromagnetic waves in a cylindrical metallic waveguide with a degenerate plasma column protected by an annular dielectric
layer are obtained. The permissible frequency regions for slow and fast waves in E-mode (TM) are presented. Furthermore, the
graph of cutoff frequency versus the radius of plasma column for the fast waves is investigated. In addition, the time growth
rate for excitation of symmetric slow E-modes (TM) by a thin annular relativistic electron beam (TAREB) is studied. The graph
of time growth rate respect to radius of dielectric layer and accelerating voltage are presented.
PACS No. 52.25. |
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| Keywords: | Degenerate Plasma waveguide Cherenkov interaction thin annular relativistic electron beam (TAREB) |
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