Effects of eletron heating on the current driven electrostatic ion cyclotron instability and plasma transport processes along auroral field lines

Details Effects of eletron heating on the current driven electrostatic ion cyclotron instability and plasma transport processes along auroral field lines Effects of eletron heating on the current driven electrostatic ion cyclotron instability and plasma transport processes along auroral field lines

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988georl..15.1291g&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 15, Oct. 1988, p. 1291-1294. NASA-Navy-supported research.

Physics

28

Auroral Zones, Electron Cyclotron Heating, Ion Cyclotron Radiation, Magnetohydrodynamic Stability, Plasma Dynamics, Lines Of Force, Plasma Currents

Scientific paper

Fluid simulations of the plasma along auroral field lines in the return current region have been performed. It is shown that the onset of electrostatic ion cyclotron (EIC) related anomalous resistivity and the consequent heating of electrons leads to a transverse ion temperature that is much higher than that produced by the current driven EIC instability (CDICI) alone. Two processes are presented for the enhancement of ion heating by anomalous resistivity. The anomalous resistivity associated with the turbulence is limited by electron heating, so that CDICI saturates at transverse temperature that is substantially higher than in the absence of resistivity. It is suggested that this process demonstrates a positive feedback loop in the interaction between CDICI, anomalous resistivity, and parallel large-scale dynamics in the topside ionosphere.

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