Transport and Acceleration of Electrons from the Outer to the Inner Magnetosphere

Details Transport and Acceleration of Electrons from the Outer to the Inner Magnetosphere Transport and Acceleration of Electrons from the Outer to the Inner Magnetosphere

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm33c0469s&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM33C-0469

Physics

2731 Magnetosphere: Outer, 2753 Numerical Modeling, 2764 Plasma Sheet

Scientific paper

To examine the transport and acceleration of electrons throughout the Earth's magnetosphere, a global model that follows electron motion in magnetic and electric fields representative of the magnetospheric configuration has been developed. The goal is to understand the formation of the seed electron population with energies > keV located at about 10 R_E from the Earth in the equatorial plane. The results show that electrons launched in the outer magnetospere are adibatically compressed as they convect towards the magnetic midplane in the magnetotail forming a heated central plasma sheet towards the Earth. A group of electrons accelerated near a reconnection region located in the deep magnetotail also contributes to the plasma sheet population and the heated distribution function that forms in the seed region (at about 10 R_E) is a combination of electrons that are accelerated adiabatically and non-adiabatically. The results also show that the seed electron distribution is highly anisotropic with the perpendicular temperature about 2 times the parallel temperature. Results that consider different magnetic activity levels will be discussed and comparisions with Cluster satellite data in the near-Earth plasma sheet region will be presented.

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