Particle and field stress balance within a planetary magnetosphere

Details Particle and field stress balance within a planetary magnetosphere Particle and field stress balance within a planetary magnetosphere

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.8253m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Sept. 1, 1985, p. 8253-8264.

Astronomy and Astrophysics

Astronomy

22

Energetic Particles, Magnetic Field Configurations, Planetary Magnetic Fields, Saturn Atmosphere, Stress Tensors, Earth Magnetosphere, Ion Temperature, Spaceborne Astronomy, Voyager 1 Spacecraft

Scientific paper

A technique is developed for experimentally estimating the local tensor stresses within a planetary magnetic field configuration characterized by local spacecraft measurements. Key to the technique is the determination of the shapes of field lines using the symmetry properties of the system coupled with local and instantaneous measurements of the field line inclination angles. The technique is applied here to the inner and middle Saturnian magnetosphere using data returned by the Magnetic Field Experiment on the Voyager 1 spacecraft. It is concluded that the ring current has substantial radial structure, heretofore not shown. Outside about 13 R(s) the newly derived field stresses match remarkably well the funtional variation of the centrifugal corotation stresses of the cool particle population measured previously by the Plasma Science Experiment. Inside about 13 R(s) the key structure in the derived field stresses, a prominent local maximum, matches the approximate position of an apparent strong pressure gradient in the energetic particles characterized by the Low-Energy Charged Particle detectors.

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