Effect of double layers on magnetosphere-ionosphere coupling

Details Effect of double layers on magnetosphere-ionosphere coupling Effect of double layers on magnetosphere-ionosphere coupling

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987lpb.....5..351l&link_type=abstract

(NASA, Conference on Double Layers in Plasmas, Huntsville, AL, Mar. 1986) Laser and Particle Beams (ISSN 0263-0346), vol. 5, May

Computer Science

9

Auroral Zones, Earth Ionosphere, Earth Magnetosphere, Magnetosphere-Ionosphere Coupling, Plasma Layers, Coupling, Magnetohydrodynamic Waves, Plasma Currents, Plasma Turbulence, Wave Propagation

Scientific paper

The dynamic aspects of auroral current structures are reviewed with emphasis on consequences for models of microscopic turbulence (MT). A number of models of MT are introduced into a large-scale model of Alfven wave propagation to determine the effect of various models on the overall structure of auroral currents. The effect of a double layer (DL) electric field which scales with the plasma temperature and the Debye length is compared with the effect of anomalous resistivity due to electrostatic ion cyclotron turbulence in which the electric field scales with the magnetic field strength. It is shown that the DL model is less diffusive than the resistive model, indicating the possibility of narrow intense current structures.

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