Different roles of electron beam in two stream instability in an elliptical waveguide for generation and amplification of THz electromagnetic waves
- Department of Communications Engineering, Faculty of Electrical And Computer Engineering, University of Kashan, Kashan, Islamic Republic of Iran (Iran, Islamic Republic of)
In this work, two stream instability in a metallic waveguide with elliptical cross-section and with a hollow annular dielectric layer is studied for generation and amplification of THz electromagnetic waves. Dispersion relation of waves and their dependents to geometric dimensions and characteristics of the electron beam are analyzed. In continuation, the diagrams of growth rate for some operating frequencies are presented, so that effective factors on the growth rates, such as geometrical dimensions, dielectric constant of dielectric layer, accelerating voltage, and applied current intensity are analyzed. It is shown that while an electron beam is responsible for instability, another electron beam plays a stabilizing role.
- OSTI ID:
- 22599945
- Journal Information:
- Physics of Plasmas, Vol. 23, Issue 8; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFICATION
CROSS SECTIONS
DIAGRAMS
DIELECTRIC MATERIALS
DISPERSION RELATIONS
DISPERSIONS
ELECTRIC POTENTIAL
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRONS
LAYERS
PERMITTIVITY
TWO-STREAM INSTABILITY
WAVEGUIDES