Generation of Alfvén waves by high power pulse at the electron plasma frequency

Details Generation of Alfvén waves by high power pulse at the electron plasma frequency Generation of Alfvén waves by high power pulse at the electron plasma frequency

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3208101v&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 8, CiteID L08101

Physics

3

Electromagnetics: Plasmas, Interplanetary Physics: Mhd Waves And Turbulence (2752, 6050, 7836), Ionosphere: Plasma Waves And Instabilities (2772), Magnetospheric Physics: Mhd Waves And Instabilities (2149, 6050, 7836)

Scientific paper

The interaction of a short high power pulse at the electron plasma frequency (f = 9 GHz, τ = .5 μs, P < 70 kW) and a magnetized plasma (n0 <= 1.25 . 1012 cm-3, B0 = 1.0 - 2.5 kG, Helium) capable of supporting Alfvén waves has been studied. The interaction leads to the generation of inertial shear Alfvén waves. The Alfvén waves are centered in an azimuthal layer corresponding to the location of the plasma frequency cutoff. The Alfvén waves are monochromatic with frequency within 10% of the ion cyclotron frequency. Spatial patterns of the wave were measured at different axial and radial locations.

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