Isotropized magnetic-moment equation of state for the central plasma sheet

Details Isotropized magnetic-moment equation of state for the central plasma sheet Isotropized magnetic-moment equation of state for the central plasma sheet

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..271k&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, March 1990, p. 271-274.

Physics

11

Ampte (Satellites), Equations Of State, Geomagnetic Tail, Magnetic Field Configurations, Magnetic Moments, Plasma Layers, Adiabatic Conditions, Equatorial Regions, Plasma Pressure, Polytropic Processes

Scientific paper

The AMPTE/IRM plasma and magnetic field data show that the compression in the central plasma sheet near the equatorial plane is governed by the isotropized magnetic-moment equation of state, P/(NBz) = constant, derived from the invariance of the magnetic moment under the assumption of isotropic ion pressure P where N is the number density and Bz is the normal field component in the plasma sheet. The adiabatic equation of state, P/N exp 5/3 = constant, can be expected to govern the compression in the distant plasma sheet or the plasma sheet boundary layer where fewer particles are likely to escape from a flux tube through the loss cone to meet the particle conservation requirement of the adiabatic condition.

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