Azimuthal surface waves in cylindrical metal waveguides partially filled by magnetoactive plasma: Analysis of energy transfer

2020 ◽  
Vol 27 (6) ◽  
pp. 062108
Author(s):  
Igor O. Girka ◽  
Oleksii I. Girka ◽  
Manfred Thumm
Keyword(s):  
Energy Transfer ◽  
Surface Waves ◽  
Magnetoactive Plasma ◽  
Plasma Analysis ◽  
Cylindrical Metal

scholarly journals HIGHER RADIAL MODES OF AZIMUTHAL SURFACE WAVES ABOVE THE UPPER-HYBRID FREQUENCY IN CYLINDRICAL WAVEGUIDES PARTIALLY FILLED BY PLASMA

2020 ◽  
pp. 22-25
Author(s):  
I. Girka ◽  
V. Kondratenko
Keyword(s):  
Surface Waves ◽  
Plasma Column ◽  
Particle Density ◽  
Low Frequency ◽  
Magnetoactive Plasma ◽  
Cylindrical Metal ◽  
Cylindrical Waveguides ◽  
Waveguide Design ◽  
The Waves ◽  
Metal Wall

Azimuthal surface waves (ASWs) are known to be eigen waves of cylindrical metal waveguides partially filled by magnetoactive plasma. Zeroth radial modes were under study earlier. Their dispersion properties are known to be significantly influenced by the plasma column properties: its particle density, external axial static magnetic field, geometric dimensions, – rather than properties of the dielectric layer which separates the plasma column from the metal wall. Application of higher order ASWs in the low-frequency range was shown earlier to make it possible to get advantage of exciting ASWs with higher frequency than in the case of zeroth order ASWs without no change in the waveguide design. The present study generalises those investigation for the case of the waves above the upperhybrid frequency.

Interaction of inhomogeneous beam with surface waves in magnetoactive plasma

1969 ◽  
Vol 11 (9) ◽  
pp. 707-714 ◽  
Author(s):  
N M El-Siragy ◽  
V I Pakhomov
Keyword(s):  
Surface Waves ◽  
Magnetoactive Plasma

scholarly journals Nonlinear interactions among standing surface and internal gravity waves

1974 ◽  
Vol 63 (4) ◽  
pp. 801-825 ◽  
Author(s):  
Terrence M. Joyce
Keyword(s):  
Energy Transfer ◽  
Steady State ◽  
Internal Wave ◽  
Surface Waves ◽  
Viscous Dissipation ◽  
Growth Rates ◽  
Internal Gravity Wave ◽  
Internal Gravity Waves ◽  
Resonant Interaction ◽  
Initial Growth

A laboratory study has been undertaken to measure the energy transfer from two surface waves to one internal gravity wave in a nonlinear, resonant interaction. The interacting waves form triads for which \[ \sigma_{1s} - \sigma_{2s} \pm\sigma_1 = 0\quad {\rm and}\quad \kappa_{1s} - \kappa_2s} \pm \kappa_I = 0; \] σj and κj being the frequency and wavenumber of the jth wave. Unlike previously published results involving single triplets of interacting waves, all waves here considered are standing waves. For both a diffuse, two-layer density field and a linearly increasing density with depth, the growth to steady state of a resonant internal wave is observed while two deep water surface eigen-modes are simultaneously forced by a paddle. Internal-wave amplitudes, phases and initial growth rates are compared with theoretical results derived assuming an arbitrary Boussinesq stratification, viscous dissipation and slight detuning of the internal wave. Inclusion of viscous dissipation and slight detuning permit predictions of steady-state amplitudes and phases as well as initial growth rates. Satisfactory agreement is found between predicted and measured amplitudes and phases. Results also suggest that the internal wave in a resonant triad can act as a catalyst, permitting appreciable energy transfer among surface waves.

Rayleigh surface waves along the boundary between a plasma and a metallic screen

1993 ◽  
Vol 49 (2) ◽  
pp. 227-235 ◽  
Author(s):  
S. T. Ivanov ◽  
K. M. Ivanova ◽  
E. G. Alexov
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Wave ◽  
Surface Waves ◽  
Electromagnetic Waves ◽  
Electromagnetic Wave Propagation ◽  
Cyclotron Frequency ◽  
Plasma Frequency ◽  
Magnetoactive Plasma ◽  
Rayleigh Surface Waves ◽  
The Waves

Electromagnetic wave propagation along the interface between a magnetoactive plasma and a metallic screen is investigated analytically and numerically. It is shown that the waves have a Rayleigh character: they are superpositions of two partial waves. It is concluded that electromagnetic waves propagate only at frequencies lower than min (ωp, ωc), where ωpis the plasma frequency and ωcis the cyclotron frequency. The field topology is found, and the physical character of the waves is discussed.

Theory of azimuthal surface waves propagating in non-uniform waveguides

2010 ◽  
Vol 77 (4) ◽  
pp. 493-519 ◽  
Author(s):  
V. O. GIRKA ◽  
I. O. GIRKA ◽  
A. V. GIRKA ◽  
I. V. PAVLENKO
Keyword(s):  
Magnetic Fields ◽  
Surface Waves ◽  
Successive Approximation ◽  
Plasma Density ◽  
Maxwell Equations ◽  
Dispersion Properties ◽  
Cylindrical Metal ◽  
Analytical Research ◽  
Axis Of Symmetry ◽  
Operating Regimes

AbstractThis paper is devoted to the theory of surface waves propagating across axis of symmetry in non-uniform cylindrical metal waveguides with plasma filling. The presented results are devoted to: first, studying an influence of plasma density non-uniformity on the features of these waves; second, studying an influence of an external magnetic fields' non-uniformity on their dispersion properties; third, studying possibility to sustain gas discharge by propagation of these waves under different operating regimes. The problems have been solved both analytically and numerically. Plasma particles are described in the framework of hydrodynamics; fields of the studied waves are determined by a set of Maxwell equations. Analytical research of the obtained equations is carried out by the method of successive approximation; adequacy of such approach is proved here as well. Numerical evaluations of the possibilities to observe experimentally the phenomena, which accompany propagation of these waves, are carried out.

Nonpotential surface waves in magnetoactive plasma structures

1991 ◽  
Vol 34 (6) ◽  
pp. 540-545
Author(s):  
V. L. Golub ◽  
A. N. Kondratenko ◽  
V. P. Olifer
Keyword(s):  
Surface Waves ◽  
Magnetoactive Plasma

Energy transfer between external and internal gravity waves

1964 ◽  
Vol 19 (3) ◽  
pp. 465-478 ◽  
Author(s):  
F. K. Ball
Keyword(s):  
Energy Transfer ◽  
Internal Wave ◽  
Surface Waves ◽  
Shallow Water ◽  
Gravity Waves ◽  
External Surface ◽  
Internal Gravity Waves ◽  
Liquid System ◽  
Resonant Interactions ◽  
Non Linear

In a two-layer liquid system non-linear resonant interactions between a pair of external (surface) waves can result in transfer of energy to an internal wave when appropriate resonance conditions are satisfied. This energy transfer is likely to be more powerful than similar transfers between external waves. The shallow water case is discussed in detail.

Potential surface waves at the boundary of a metal with a magnetoactive plasma at finite pressure

1999 ◽  
Vol 44 (11) ◽  
pp. 1286-1289 ◽  
Author(s):  
N. A. Azarenkov ◽  
A. N. Kondratenko ◽  
Yu. O. Tyshetskii
Keyword(s):  
Surface Waves ◽  
Potential Surface ◽  
Magnetoactive Plasma

Coupling of surface and internal gravity waves: a mode coupling model

1976 ◽  
Vol 77 (1) ◽  
pp. 185-208 ◽  
Author(s):  
Kenneth M. Watson ◽  
Bruce J. West ◽  
Bruce I. Cohen
Keyword(s):  
Energy Transfer ◽  
Surface Wave ◽  
Internal Wave ◽  
Surface Waves ◽  
Wave Field ◽  
Internal Waves ◽  
Wave Spectrum ◽  
Coupled Model ◽  
Internal Gravity Waves ◽  
Growth Time

A surface-wave/internal-wave mode coupled model is constructed to describe the energy transfer from a linear surface wave field on the ocean to a linear internal wave field. Expressed in terms of action-angle variables the dynamic equations have a particularly useful form and are solved both numerically and in some analytic approximations. The growth time for internal waves generated by the resonant interaction of surface waves is calculated for an equilibrium spectrum of surface waves and for both the Garrett-Munk and two-layer models of the undersea environment. We find energy transfer rates as a function of undersea parameters which are much faster than those based on the constant Brunt-ViiisSila model used by Kenyon (1968) and which are consistent with the experiments of Joyce (1974). The modulation of the surface-wave spectrum by internal waves is also calculated, yielding a ‘mottled’ appearance of the ocean surface similar to that observed in photographs taken from an ERTS1 satellite (Ape1 et al. 1975b).

Excitation of Surface Waves in Magnetoactive Plasma by a Moving Charged Particle

2003 ◽  
Vol 59 (10-12) ◽  
pp. 111-118 ◽  
Author(s):  
S. I. Khankina ◽  
V. M. Yakovenko ◽  
I. V. Yakovenko
Keyword(s):  
Charged Particle ◽  
Surface Waves ◽  
Magnetoactive Plasma
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