Azimuthal surface waves in a nonuniform plasma cylinder

Girka, V. O.; Гірка, І. О.

doi:10.1007/bf01080766

Cited by 17 publications

(51 citation statements)

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“…Propagation of the ordinary ASW was studied in [15] and the influence of a weak radial plasma density inhomogeneity on the dispersion properties of ASW was studied in [16]. If the plasma density has a linear profile near the boundary, then the ASW dispersion properties are similar to those of a uniform plasma by replacing the penetration depth of these waves into the plasma with an "effective" value of this parameter [17]. The propagation of surface-type electromagnetic waves with small axial wavenumber k z was studied in [18].…”

Section: Formulation Of the Problemmentioning

confidence: 99%

Higher Radial Modes of Azimuthal Surface Waves in Cylindrical Waveguides Without External Magnetic Field

Гірка¹,

Omelchenko²,

Sydora³

2017

PIER M

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Abstract-The properties of higher order radial modes of electromagnetic azimuthal surface-type waves (ASW) which propagate in partially plasma-filled cylindrical waveguides without external magnetic field are analyzed using analytical and numerical techniques. For a waveguide with plasma surrounded by dielectric material and encased in metal, the eigenfrequencies for higher order radial modes are obtained. It is found that the ASW higher radial modes propagate with shorter vacuum wavelength than the zeroth order radial modes and that the more favourable conditions for higher order radial mode propagation are for ASW's with larger azimuthal wavenumber in waveguides with wider dielectric layer and larger dielectric constant. A further salient feature of ASW higher radial modes is that a change in plasma waveguide parameters causes a drastic change in ASW eigenfrequency in contrast to the zero-th order modes which have a smoother frequency variation with effective wavenumber.

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Section: Formulation Of the Problemmentioning

confidence: 99%

Higher Radial Modes of Azimuthal Surface Waves in Cylindrical Waveguides Without External Magnetic Field

Гірка¹,

Omelchenko²,

Sydora³

2017

PIER M

View full text Add to dashboard Cite

show abstract

“…As it is shown analytically in [16] and proved numerically in [17], the tangential component of the ASW electric field is very small as compared with the radial one. Therefore in the expressions (10) for Q oh , we can neglect corresponding contribution that is proportional to the E pl ϕ and do not take into account the radial component of the wave power flow, because S r << S ϕ [17].…”

Section: Gas Discharge Sustained By Asw In Plasma Filled Cylindrical mentioning

confidence: 70%

“…Numerical analysis made in [16] proves that spatial distributions of the ASW fields in the both cases of cylindrical metal waveguide with the plasma filling and cylindrical antenna immersed into the non-restricted magnetoactive plasma are similar to each other under the inversion of the co-ordinate system center. It means that like the previous case, the ASW electric components can be found from eq.…”

Section: The Case Of Cylindrical Antenna Immersed Into Magnetoactive mentioning

confidence: 98%

“…The spatial distribution of ASW electromagnetic field and the ASW dispersion properties have been examined in [16] for the both indicated techniques. Likeness of the field's spatial distributions for the both cases has been found there analytically.…”

Section: The Basic Equations and Assumptionsmentioning

confidence: 99%

“…Their amplitudes decrease with going away from the discharge chamber interface. The ASW dispersion properties in magnetoactive metal waveguide completely filled by plasma have been studied in [16]. These electromagnetic surface waves, which can sustain the gas discharges are eigenmodes of waveguide structure.…”

Section: Introductionmentioning

confidence: 99%

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