Short-wavelength drift dissipative instability in the presence of field-aligned currents

Details Short-wavelength drift dissipative instability in the presence of field-aligned currents Short-wavelength drift dissipative instability in the presence of field-aligned currents

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982p%26ss...30..581b&link_type=abstract

Planetary and Space Science, vol. 30, June 1982, p. 581-585.

Physics

2

Electrostatic Waves, F Region, Field Aligned Currents, Ionospheric Currents, Ionospheric Drift, Short Wave Radiation, Auroral Zones, Ionic Collisions, Magnetohydrodynamic Stability

Scientific paper

Sharp density gradients coupled with field-aligned currents can give rise to short wavelength (less than approximately 15 m) drift waves due to collisional effects in the F-region of the auroral ionosphere. In this wavelength range, ion-ion collisions at altitudes of 300-450 km render the ions unmagnetized and a field-aligned current can drive a drift wave, propagating almost transverse to the magnetic field, unstable due to the resistance in electron parallel motion arising from electron collisions.

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