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Title: Terahertz electromagnetic wave generation and amplification by an electron beam in the elliptical plasma waveguides with dielectric rod

The propagation of electromagnetic waves in an elliptical plasma waveguide including strongly magnetized plasma column and a dielectric rod is investigated. The dispersion relation of guided hybrid electromagnetic waves is obtained. Excitation of the waves by a thin annular relativistic elliptical electron beam will be studied. The time growth rate of electromagnetic waves is obtained. The effects of relative permittivity constant of dielectric rod, radius of dielectric rod, accelerating voltage, and current density of the annular elliptical beam on the growth rate and the frequency spectra are numerically presented.
Authors:
;  [1] ;  [2]
  1. Department of Laser and Photonics, Faculty of Physics, University of Kashan, Kashan (Iran, Islamic Republic of)
  2. Department of Condense Matter, Faculty of Physics, University of Kashan, Kashan (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22303434
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLIFICATION; CURRENT DENSITY; DIELECTRIC MATERIALS; DISPERSION RELATIONS; ELECTRIC POTENTIAL; ELECTROMAGNETIC RADIATION; ELECTRON BEAMS; PERMITTIVITY; PLASMA; RELATIVISTIC RANGE