Detailed observations of the plasma sheet during a substorm on April 24, 1979

Details Detailed observations of the plasma sheet during a substorm on April 24, 1979 Detailed observations of the plasma sheet during a substorm on April 24, 1979

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.6845h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, June 1, 1986, p. 6845-6859. DOE-sponsored research.

Physics

36

Plasma Layers, Polar Substorms, Space Plasmas, Anisotropic Media, Energetic Particles, Geomagnetic Tail, International Sun Earth Explorers, Ion Density (Concentration), Magnetic Field Reconnection

Scientific paper

Plasma, magnetic field, and energetic particle data obtained by ISEE 1 and 2 satellites for the April 24, 1979 substorm are studied in relation to the neutral line model and the boundary layer model. The ISEE 1 and 2 instruments and experiments utilized to collect the data are discussed. The major reconfiguration of the tail plasma and magnetic field plasma region, and the plasma ion flows observed support the neutral line model for interpreting substorms. The plasma ion distribution function and plasma flow are examined. The region of lobe-plasma sheet interface referred to as the separatrix layer is identified. The differences in times of plasma sheet dropout and recovery, and absence or presence of flux anisotropies are investigated. Energetic particle measurements are analyzed to study the relationship between energetic ions and plasma ions, and the velocity distributions. The data support the application of the neutral line model to the evaluation of substorms; however, the data are inconsistent with the boundary layer dynamics model.

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