Guided waves in magnetospheric tubes of enhanced density

Details Guided waves in magnetospheric tubes of enhanced density Guided waves in magnetospheric tubes of enhanced density

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981p%26ss...29..609m&link_type=abstract

Planetary and Space Science, vol. 29, June 1981, p. 609-613.

Computer Science

3

Cold Plasmas, Earth Magnetosphere, Magnetic Field Configurations, Magnetohydrodynamic Waves, Plasma Density, Propagation Velocity, Atmospheric Refraction, Collisionless Plasmas, Field Aligned Currents, Magnetoacoustic Waves, Polarization (Waves), Waveguides

Scientific paper

Properties of a guided MHD-wave propagating in a magnetic field tube with plasma density differing from the ambient density are studied. Like the Alfven wave, this wave propagates along the magnetic field and is connected with the field-aligned currents flowing at the periphery of the oscillating tube. The guided wave is accompanied by magnetic field compression, nevertheless the wave moves without attenuation. The guided wave velocity is between the Alfven velocities inside and outside the oscillating tube. In a tube of elliptical cross-section, the propagation velocity depends on the polarization of the wave.

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