Energetic Characteristics of the Surface Electromagnetic Wave at Plasma-Plasma Interface in Magnetic Field
Abstract
Energetic characteristics of a surface wave at a plane plasma-plasma interface in an external magnetic field are studied. The dependencies of energy flow density and energy density on wave vector for different magnitudes of external magnetic field are analyzed. The sign of the Poynting vector in each plasma region is investigated. It is shown that the total energy flux of the surface wave is directed along the wave vector. The velocity of energy propagation is found. The equivalence between energy velocity and group velocity of the wave is demonstrated. The results obtained in the paper may be useful for analysis of transmission of electromagnetic waves through two-layer plasma structures in a magnetic field.
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