Dispersion relation for azimuthal electromagnetic surface waves on a magnetized annular plasma in a metal waveguide with coaxial anisotropic dielectric inner coating

Abstract

The dispersion relation of azimuthal electromagnetic surface waves on a magnetized annular plasma surrounded by a metallic cylindrical coaxial anisotropic dielectric lined waveguide is obtained. The thickness of the dielectric and its location in the waveguide are studied with respect to their effects on the number of spectra observed. The graphs of frequency spectra against the ratio of radii of the annular plasma and η = ωpe/Ωe are plotted. Finally, surface E-modes for coaxial anisotropic and isotropic dielectrics have been investigated.

Higher radial modes of azimuthal surface waves in magnetoactive cylindrical plasma waveguides

“…Probably this second case took place in numerically solving the dispersion relation in Jazi & Mehdian (2004). It is a pity that the mistakes in deriving the expressions for the components of the extraordinarily polarized ASW fields in Shokri & Jazi (2003), Jazi & Mehdian (2004), Jazi & Shokri (2005), Jazi et al (2006), Daryanoosh & Mehdian (2007) require these authors to revise the results obtained therein.…”

“…The second part was devoted to studying the dispersion properties of extraordinarily polarized ASWs with the components E r , E ϕ , B z -this part is wrong because of mistakes in the algebra when deriving the expressions for E r and E ϕ from the set of Maxwell equations. The same mistakes are present in the papers by Shokri & Jazi (2003), Jazi & Shokri (2005), Jazi, Shokri & Arbab (2006) and Daryanoosh & Mehdian (2007) and make these papers meaningless. The paper by Shokri & Jazi (2003) presented the limiting case of the paper by Jazi & Mehdian (2004), the space r < R 4 was occupied there by a vacuum.…”

“…The expressions (2.4) were derived for the first time by Wait (1966). The wrong expressions for E r and E ϕ in Shokri & Jazi (2003), Jazi & Mehdian (2004), Jazi & Shokri (2005), Jazi et al (2006), Daryanoosh & Mehdian (2007) invalidate the conclusions therein.…”

Theory of azimuthal surface waves propagating in non-uniform waveguides

“…It would be useful to indicate, for instance, that spectrum of electromagnetic waves in a magnetoactive gaseous plasma layer is studied in detail in the paper [8]. Dispersion relation for electromagnetic SW in a magnetoactive annular plasma column located in a coaxial metal waveguide is under consideration in [9]. Taking into account the great interest in studying the dusty plasmas' properties, we would like to mention that propagation of SW on vacuum boundary with cold magnetoactive plasma containing the mobile dust grains is studied in [10].…”