Adiabatic particle motion in a nearly drift-free magnetic field - Application to the geomagnetic tail

Details Adiabatic particle motion in a nearly drift-free magnetic field - Application to the geomagnetic tail Adiabatic particle motion in a nearly drift-free magnetic field - Application to the geomagnetic tail

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.1079s&link_type=abstract

Journal of Geophysical Research, vol. 83, Mar. 1, 1978, p. 1079-1088.

Physics

1

Adiabatic Conditions, Drift Rate, Geomagnetic Tail, Particle Motion, Current Density, Geomagnetism, Jupiter Atmosphere, Magnetic Field Configurations, Plasma Density

Scientific paper

An investigation is made of the adiabatic particle motion occurring in an almost drift-free magnetic field. The dependence of the mean drift velocity on the equatorial pitch angle and the variation of the local drift velocity along the trajectories is studied. The fields considered are two-dimensional and resemble the geomagnetic tail. Derivations are presented for instantaneous and average drift velocities, bounce times, longitudinal invariants, and approximations to the adiabatic Hamiltonian. As expected, the mean drift velocity is significantly smaller than the instantaneous drift velocities found at typical points on the trajectory. The slow drift indicates that particles advance in the dawn-dusk direction rather slowly in the plasma sheet of the magnetospheric tail.

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