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

被引：18
|
作者：
Rahmani, Z. [1 ]
Jazi, B. [1 ]
Heidari-Semiromi, E. [2 ]
机构：
[1] Univ Kashan, Fac Phys, Dept Laser & Photon, Kashan, Iran
[2] Univ Kashan, Fac Phys, Dept Condense Matter, Kashan, Iran
来源：
PHYSICS OF PLASMAS | 2014年 / 21卷 / 09期
关键词：
CERENKOV RADIATION; OSCILLATIONS; PROPAGATION; MODES;
D O I：
10.1063/1.4896718
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
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. (C) 2014 AIP Publishing LLC.
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页数：10
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