Adiabatic evolution of trapped particle pitch angle distributions during a storm main phase

Details Adiabatic evolution of trapped particle pitch angle distributions during a storm main phase Adiabatic evolution of trapped particle pitch angle distributions during a storm main phase

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.2428l&link_type=abstract

Journal of Geophysical Research, vol. 82, June 1, 1977, p. 2428-2432

Physics

5

Adiabatic Conditions, Ion Distribution, Magnetic Storms, Magnetically Trapped Particles, Pitch (Inclination), Angular Distribution, Explorer Satellites, Geomagnetism, Satellite Observation

Scientific paper

Equatorial pitch angle distributions of over 200-keV ions obtained near L = 4 by Explorer 45 during a storm main phase show the development of marked minima at 90 deg pitch angle in direct association with a greater-than-a-factor-of-2 reduction in the equatorial magnetic field magnitude. The evolution of these pitch angle distributions can be quantitatively explained as a result of conservation of the first two adiabatic invariants provided the magnitude of the magnetic field decrease was approximately constant along field lines.

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