Modeled Particle Signatures of Magnetic Structures in the Geomagnetic Tail.

DOI Web Site 29 References
  • Martin, Jr. R. F.
    Physics Department, Illinois State University
  • Fricke R.
    Physics Department, Illinois State University
  • Speiser T. W.
    APAS Department, University of Colorado, Space Science Institute, and NOAA Space Environment Lab

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  • Modeled Particle Signatures of Magnetic

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Abstract

Using noninteracting particle simulation in prescribed fields, we present a range of potential particle signatures for several models of magnetic structures in the geomagnetic tail. We consider X-type neutral lines, weak fieldd regions, O-type neutral lines, flux ropes, and some combinations of structures, both symmetric and asymmetric. We concentrate on predictions of the variety of qualitative features one might be able to observe in the presence of these structures. Results include previously known features such as dips in the distribution function at resonant energies, ridges and sharp dropoffs, and field-aligned beams. In addition to these, new features including “cliffs”, “box canyons”, and quasi-trapped regions are seen. This catalog of potential signatures may be useful in interpreting data from the AMPTE spacecraft and from the recently launched Galileo, GEOTAIL and Interball spacecraft.

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