A Simulation Study of Broadband Electrostatic Noise in the Presence of Ionospheric Electrons

  1. T. E. Moore,
  2. J. H. Waite Jr.,
  3. T. W. Moorehead and
  4. W. B. Hanson
  1. D. Schriver1 and
  2. M. Ashour-Abdalla2

Published Online: 18 MAR 2013

DOI: 10.1029/GM044p0303

Modeling Magnetospheric Plasma

Modeling Magnetospheric Plasma

How to Cite

Schriver, D. and Ashour-Abdalla, M. (1988) A Simulation Study of Broadband Electrostatic Noise in the Presence of Ionospheric Electrons, in Modeling Magnetospheric Plasma (eds T. E. Moore, J. H. Waite, T. W. Moorehead and W. B. Hanson), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM044p0303

Author Information

  1. 1

    Department of Physics, University of California, Los Angeles, California 90024

  2. 2

    Department of Physics and Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90024

Publication History

  1. Published Online: 18 MAR 2013
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780875900704

Online ISBN: 9781118664414

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Keywords:

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

Summary

Ion beams have been observed flowing along magnetic field lines in the earth's plasma sheet boundary layer and are believed to generate intense electrostatic wave activity known as broadband electrostatic noise. Cold electrons of ionospheric origin have also been observed in this same region and it has been shown that the addition of these cold electrons modifies substantially the plasma wave dispersion properties. With cold electrons present, four instabilities can be excited: (1) ion acoustic, (2) electron acoustic, (3) beam resonant, and (4) Buneman two stream. These instabilities can generate waves with large growth rates at frequencies consistent with broadband electro-static noise. Using computer simulations, we examine the wave energy frequency spectrum generated by these instabilities, as well as cold electron heating and nonlinear effects on the ion beam.