Accession Number : ADA116400

Title :   Electric Fields in Earth Orbital Space.

Descriptive Note : Annual rept.,


Personal Author(s) : Olson,W P ; Pfitzer,K A ; Scotti,S J

PDF Url : ADA116400

Report Date : May 1982

Pagination or Media Count : 48

Abstract : This is a report of progress during the past year. The work was performed in three areas with a long term goal understanding the formation and maintenance of electrostatic fields in the earth's magnetosphere. The entry of low energy charged particles into a magnetically closed magnetosphere has been examined in some detail. Entry is permitted because of the non-uniform nature of the magnetic field over the magnetopause surface. Electrostatic fields may be formed across the tail of the magnetosphere because fo the different 'entry efficiencies ' of protons and electrons. The consequences of this particle entry mechanism for the plasma sheet, plasma mantle, and boundary plasmas in the magnetosphere are examined. The mathematics of particle entry was investigated in a one-dimensional boundary using both kinetic theory and bulk MHD parameters. From our participation in the 6th Coordinated Data Analysis Workshop, we have determined that at least during disturbed magnetic conditions, currents persist near geoshychronous orbit in the nightime region which are presently not included in our dynamic magnetic field models. These currents are probably associated with the field aligned currents which close in the ionosphere near auroral latitudes. (Author)

Descriptors :   *Electric fields, *Electrostatic fields, *Earth orbits, *Data processing, *Workshops, Magnetosphere, Magnetic fields, Magnetic properties, Boundaries, Plasmas(Physics), Models, Low energy, Kinetic theory, Electrons, Sheets, Earth mantle

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE