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Anisotropic Distributions of Energetic Electrons in the Earth’s Magnetotail and Magnetosheath

  • S. Singer
  • S. J. Bame
Part of the Astrophysics and Space Science Library book series (ASSL, volume 17)

Abstract

It is now well established (Anderson, 1965; Bame et al., 1966, 1967; Montgomery et al., 1965; Murayama, 1966; Montgomery, 1968) that the earth’s magnetotail and magnetosheath support a population of energetic electrons at distances well beyond the boundary of stable trapping, and that the spatial and temporal characteristics of the population depend on whether the particles are observed in the plasma sheet, the high latitude magnetotail, or in the magnetosheath. The directional characteristics of the electrons have been investigated less extensively. Early Vela results (Bame et al., 1964, 1965; Asbridge et al., 1965; Singer et al., 1967) reported streaming and non-streaming anisotropies, although at least some of the streaming events were due to instrumental effects. At radial distances up to 16.5 RE, both Serlemitsos (1966) and Haskell (1969) have reported trapped electrons whose pitch angles are nearly parallel to the magnetic field, a condition which Haskell attributes to L shell splitting (Mead, 1966; Roederer, 1967). Haskell also detected streaming electrons in the magnetosheath near the magnetopause, and interpreted them in terms of particles leaking out of the magnetosphere.

Keywords

Pitch Angle Plasma Sheet Energetic Electron Anisotropy Ratio Magnetic Field Direction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1970

Authors and Affiliations

  • S. Singer
    • 1
  • S. J. Bame
    • 1
  1. 1.Los Alamos Scientific LaboratoryUniversity of CaliforniaLos AlamosUSA

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