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

Abstract

Fluid simulations of the plasma along auroral field lines in the return current tregion have been performed to show that the onset of electrostatic ion cyclotron (EIC) related anomalous resistivity and the consequent heating of electrons leads to much higher transverse ion temperature than the current driven EIC instability (CDICI) alone would produce. Anomalous resistivity enhances ion heating in two ways: (1) by inhibiting the growth of critical electron-ion drift velocity, V/sub c//sub H/, which must be exceeded to excite the EIC instability and (2) by increasing the relative drift velocity between the electrons and the ions, V/sub D/, through the formation of density cavities due to increased ambipolar electric field. The anomalous resistivity associated with the turbulence is limited by electron heating, so that CDICI eventually saturates, but at a substantially higher transverse teperature than would be the case in the absence of resistivity. This process demonstrates a positive feedback loop in the interaction between CDICI, anomalous resistivity, and parallel large scale dynamics in the topside ionosphere. copyright American Geophysical Union 1988

Authors:
; ;
Publication Date:
Research Org.:
Science Applications International Corporation, Mclean, VA
OSTI Identifier:
6740101
Resource Type:
Journal Article
Journal Name:
Geophys. Res. Lett.; (United States)
Additional Journal Information:
Journal Volume: 15:11
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AURORAE; ICR HEATING; EARTH MAGNETOSPHERE; ELECTRIC CURRENTS; ELECTRIC FIELDS; ELECTRON TEMPERATURE; ELECTRONS; HYDROGEN IONS; ION TEMPERATURE; MAGNETIC FIELDS; OXYGEN IONS; PLASMA SIMULATION; CHARGED PARTICLES; CURRENTS; EARTH ATMOSPHERE; ELEMENTARY PARTICLES; FERMIONS; HEATING; HIGH-FREQUENCY HEATING; IONS; LEPTONS; PLASMA HEATING; SIMULATION; 640201* - Atmospheric Physics- Auroral, Ionospheric, & Magetospheric Phenomena

Citation Formats

Ganguli, S B, Palmadesso, P J, and Mitchell, H G. Effects of electron heating on the current driven electrostatic ion cyclotron instability and plasma transport processes along auroral field lines. United States: N. p., 1988. Web. doi:10.1029/GL015i011p01291.
Ganguli, S B, Palmadesso, P J, & Mitchell, H G. Effects of electron heating on the current driven electrostatic ion cyclotron instability and plasma transport processes along auroral field lines. United States. https://doi.org/10.1029/GL015i011p01291
Ganguli, S B, Palmadesso, P J, and Mitchell, H G. Sat . "Effects of electron heating on the current driven electrostatic ion cyclotron instability and plasma transport processes along auroral field lines". United States. https://doi.org/10.1029/GL015i011p01291.
@article{osti_6740101,
title = {Effects of electron heating on the current driven electrostatic ion cyclotron instability and plasma transport processes along auroral field lines},
author = {Ganguli, S B and Palmadesso, P J and Mitchell, H G},
abstractNote = {Fluid simulations of the plasma along auroral field lines in the return current tregion have been performed to show that the onset of electrostatic ion cyclotron (EIC) related anomalous resistivity and the consequent heating of electrons leads to much higher transverse ion temperature than the current driven EIC instability (CDICI) alone would produce. Anomalous resistivity enhances ion heating in two ways: (1) by inhibiting the growth of critical electron-ion drift velocity, V/sub c//sub H/, which must be exceeded to excite the EIC instability and (2) by increasing the relative drift velocity between the electrons and the ions, V/sub D/, through the formation of density cavities due to increased ambipolar electric field. The anomalous resistivity associated with the turbulence is limited by electron heating, so that CDICI eventually saturates, but at a substantially higher transverse teperature than would be the case in the absence of resistivity. This process demonstrates a positive feedback loop in the interaction between CDICI, anomalous resistivity, and parallel large scale dynamics in the topside ionosphere. copyright American Geophysical Union 1988},
doi = {10.1029/GL015i011p01291},
url = {https://www.osti.gov/biblio/6740101}, journal = {Geophys. Res. Lett.; (United States)},
number = ,
volume = 15:11,
place = {United States},
year = {1988},
month = {10}
}