Excitation of high-frequency azimuthal surface waves by an annular electron beam in a waveguide with a noncircular interface of the plasma column

Journal Article · Wed May 15 00:00:00 EDT 2013 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X13050048· OSTI ID:22126525

Pavlenko, I. V. ^[1]

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1. V. N. Karazin Kharkiv National University (Ukraine)

An initial stage of the interaction of an electron beam ring rotating along Larmor orbits in a gap between the plasma column and a circular metal chamber of a cylindrical waveguide with extraordinarily polarized electromagnetic waves of the surface type is studied. These waves propagate along the azimuthal angle across an axial magnetic field in the range above the upper hybrid frequency. Using numerical analysis of the dispersion relation, it is shown that by the aid of an appropriate choice of the shape of the plasma-vacuum interface one can achieve a significant increasing of growth rates of the resonant beam instability of these waves.

• OSTI ID: 22126525
• Journal Information: Plasma Physics Reports, Vol. 39, Issue 5; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CYLINDRICAL CONFIGURATION
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
EXCITATION
INSTABILITY
LARMOR RADIUS
MAGNETIC FIELDS
NUMERICAL ANALYSIS
PLASMA
ROTATING PLASMA
SURFACES
WAVE PROPAGATION
WAVEGUIDES