Effect of a Sudden Impulse in Electron Temperature on the Polar Wind: A Time-Dependent Semi-Kinetic Model

  1. Gordon R. Wilson
  1. C.W. Ho,
  2. J. L. Horwitz and
  3. G. R. Wilson

Published Online: 18 MAR 2013

DOI: 10.1029/GM062p0105

Modeling Magnetospheric Plasma Processes

Modeling Magnetospheric Plasma Processes

How to Cite

Ho, C.W., Horwitz, J. L. and Wilson, G. R. (1991) Effect of a Sudden Impulse in Electron Temperature on the Polar Wind: A Time-Dependent Semi-Kinetic Model, in Modeling Magnetospheric Plasma Processes (ed G. R. Wilson), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM062p0105

Author Information

  1. Department of Physics and Center for Space Plasma and Aeronomic Research, the University of Alabama in Huntsville

Publication History

  1. Published Online: 18 MAR 2013
  2. Published Print: 1 JAN 1991

ISBN Information

Print ISBN: 9780875900285

Online ISBN: 9781118663905

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Keywords:

  • Space plasmas—Mathematical models—Congresses;
  • Magnetosphere—Mathematical models—Congresses

Summary

The time-dependent semi-kinetic model that Wilson et al. [1990] developed is used to investigate the effects on the polar wind outflow subjected to an abrupt electron temperature increase and then decrease. Immediate effects which can be seen are the formation of H+ density depletions and O+ density enhancements at the lower boundary of the simulation region which subsequently travelling up the flux tube. ‘Kinetic phenomena' such as ion dispersion and multiple streams are observed. Steep density gradients are formed but they are smoothed out by dispersion as they propagate along the flux tube. Such effects are indications of the advantages of the kinetic model in simulating plasma outflows when details of the distribution function are desired.