Rotation of electromagnetic energy initiated by azimuthal surface waves in coaxial metal waveguides entirely filled by plasma

Abstract

Azimuthal surface waves are well-known to be eigenwaves of coaxial metal waveguides entirely filled by plasma. The present study of electromagnetic energy transfer complements the investigation of the wave dispersion properties carried out earlier. The angular velocity of energy transfer is analyzed as a function of the coaxial-line parameters and compared with three limiting cases. One case is a metal waveguide entirely filled by plasma. The second case is a metal rod placed into infinite plasma along an external static magnetic field. Finally, the third one is a thin coaxial waveguide.