Slow Surface-Wave Propagation in Partially Filled Coaxial Solid-Plasma Waveguide in r-Dependent Azimuthal Magnetic Field

1996 ◽  
Vol 35 (Part 1, No. 4A) ◽  
pp. 2314-2315
Author(s):  
Tetsuo Obunai
Keyword(s):  
Magnetic Field ◽  
Wave Propagation ◽  
Surface Wave ◽  
Plasma Waveguide ◽  
Azimuthal Magnetic Field ◽  
Surface Wave Propagation ◽  
Slow Surface

scholarly journals ON SURFACE WAVES IN A FINITELY DEFORMED MAGNETOELASTIC HALF-SPACE

2011 ◽  
Vol 03 (04) ◽  
pp. 633-665 ◽  
Author(s):  
P. SAXENA ◽  
R. W. OGDEN
Keyword(s):  
Magnetic Field ◽  
Wave Propagation ◽  
Surface Wave ◽  
Surface Waves ◽  
Half Space ◽  
Wave Speed ◽  
Sagittal Plane ◽  
Isotropic Energy ◽  
Surface Wave Propagation ◽  
Homogeneous Strain

Rayleigh-type surface waves propagating in an incompressible isotropic half-space of nonconducting magnetoelastic material are studied for a half-space subjected to a finite pure homogeneous strain and a uniform magnetic field. First, the equations and boundary conditions governing linearized incremental motions superimposed on an initial motion and underlying electromagnetic field are derived and then specialized to the quasimagnetostatic approximation. The magnetoelastic material properties are characterized in terms of a "total" isotropic energy density function that depends on both the deformation and a Lagrangian measure of the magnetic induction. The problem of surface wave propagation is then analyzed for different directions of the initial magnetic field and for a simple constitutive model of a magnetoelastic material in order to evaluate the combined effect of the finite deformation and magnetic field on the surface wave speed. It is found that a magnetic field in the considered (sagittal) plane in general destabilizes the material compared with the situation in the absence of a magnetic field, and a magnetic field applied in the direction of wave propagation is more destabilizing than that applied perpendicular to it.

Axial structure of surface-wave-sustained discharges influenced by local plasma resonances

1994 ◽  
Vol 52 (2) ◽  
pp. 321-337 ◽  
Author(s):  
Yu. M. Aliev ◽  
A. V. Maximov ◽  
H. Schlüter ◽  
A. Shivarova
Keyword(s):  
Wave Propagation ◽  
Surface Wave ◽  
Transverse Direction ◽  
Resonant Absorption ◽  
Particle Loss ◽  
Axial Structure ◽  
Surface Wave Propagation ◽  
Slow Surface ◽  
Basic Features ◽  
Discharge Behaviour

The influence of absorption of wave energy in regions of local plasma resonances in inhomogeneous (in the transverse direction) plasmas on the axial structure of discharges sustained by surface waves is studied analytically. The two regimes of charged-particle loss, namely diffusion- and recombinationcontrolled regimes, are considered. First, to extract the basic features of the phenomena, the discharge is modelled by a slab configuration and the case of slow surface-wave propagation is investigated. It is shown that it is resonant absorption that determines the properties of the discharge in the region towards its end. In the case of a cylindrical waveguide, which is the real configuration in experiments, the influence of the mechanism of resonant absorption is studied in both regions of fast and slow surface-wave propagation. With respect to the discharge behaviour, these cases correspond respectively to the regions at the beginning of the discharge close to the surface-wave launcher and at the discharge end.

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