Lorentz forces on the dust in Jupiter's ring

Details Lorentz forces on the dust in Jupiter's ring Lorentz forces on the dust in Jupiter's ring

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.5607c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, July 1, 1983, p. 5607-5612.

Physics

19

Cosmic Dust, Interplanetary Dust, Jupiter Rings, Lorentz Force, Particle Trajectories, Kepler Laws, Particle Acceleration, Planetary Magnetic Fields, Jupiter, Dust, Rings, Computer Programs, Gravity Effects, Motion, Drag, Charged Particles, Orbits, Perturbations, Magnetic Effects, Distance, Grains, Radius, Size

Scientific paper

The paths of dust particles in the Jovian ring are investigated using a numerical integration program, including the acceleration due to gravity and the Lorentz and drag accelerations arising from the motions of the charged dust through the Jovian plasma. It is determined that the orbit of a 2.5 micron radius spherical dust particle with a density of 2 g/cu cm -10V will become significantly perturbed. The ring will tend to warp northwards near 130-160 deg longitude, with the maximum excursion of the Jupiter ring grains equalling about 0.1 deg (consistent with a distance of 220 km above the equatorial plane). It is found that either the particles are larger or the voltages on them less than what has been determined by previous investigators, while the plasma near the ring may be considerably cooler than was estimated. Calculations show that particles of 0.3 micron with -10 V potentials are spread from 1.68-1.98 of the radius of Jupiter and inclined up to 7 deg out of the equatorial plane. The paths of these particles do not follow Keplerian orbits, and the particle positions are not symmetric about the equatorial plane. Particles of 0.4 micron radius have less asymmetric orbits than 0.3 micron particles, while particles less than 0.2 micron are perturbed into Jupiter cloudtops within a few tens of hours.

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