Nonpotential waves in the auroral electrojet

Details Nonpotential waves in the auroral electrojet Nonpotential waves in the auroral electrojet

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..46...33k&link_type=abstract

Astrophysics and Space Science, vol. 46, Jan. 1977, p. 33-39.

Astronomy and Astrophysics

Astrophysics

Auroral Electrojets, Electromagnetic Radiation, Ionospheric Disturbances, Magnetohydrodynamic Stability, Plasma Waves, Threshold Currents, Collisional Plasmas, Neutral Particles, Nonuniform Plasmas, Plasma Density, Plasma Oscillations, Wave Generation

Scientific paper

An ionospheric plasma instability in the auroral electrojet region is discussed which is believed to be responsible for electromagnetic waves with an angular frequency smaller than the collision frequency for ions with neutral particles. The threshold current velocity and oscillation growth rate are found for the realistic physical situation where a nonuniform plasma density and an ionization function are considered. It is found that the plasma density gradient may be neglected in the expressions for threshold current velocity and oscillation growth rate and that the spectral density of fluctuations in plasma density agrees well with the experimental data.

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