Dynamics of potential surface modes in a nonuniform plasma waveguide with finite electron temperature

In this paper we study the mechanisms of wave-energy transformation in nonuniform waveguide plasmas maintained by surface modes in the presence of local upper-hybrid resonance. The dispersion equation is derived for such waves in the potential case with the following effects taken into account: the...

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Bibliographic Details
Published in:Physics of plasmas 2006-05, Vol.13 (5)
Main Authors: Fedutenko, E. A., Olefir, V. P., Sporov, A.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANALYTICAL SOLUTION
CONVERSION
DAMPING
DISPERSION RELATIONS
DISTRIBUTION
ELECTRON COLLISIONS
ELECTRON TEMPERATURE
ELECTRONS
HYBRID RESONANCE
ION COLLISIONS
ION TEMPERATURE
MAGNETIC FIELDS
NUMERICAL ANALYSIS
PLASMA
POTENTIALS
SURFACES
TRANSFORMATIONS
WAVEGUIDES
WAVELENGTHS
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Summary:In this paper we study the mechanisms of wave-energy transformation in nonuniform waveguide plasmas maintained by surface modes in the presence of local upper-hybrid resonance. The dispersion equation is derived for such waves in the potential case with the following effects taken into account: the finite magnetic field, the finite electron temperature, and electron-neutral collisions. Numerical and analytical solutions for the dispersion and for eigenfield distributions of the waves are presented. The thermal conversion of the surface wave into the upper-hybrid volume modes at a finite electron temperature is shown to completely change the structure of the wave field distribution and to make the surface wave wavelength and the spatial damping rate very sensitive to slight shifts of the surface wave frequency.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.2197840