Computer Science
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989itps...17..228a&link_type=abstract
IEEE Transactions on Plasma Science (ISSN 0093-3813), vol. 17, April 1989, p. 228-237.
Computer Science
Interplanetary Dust, Kepler Laws, Orbital Mechanics, Plasma Layers, Saturn Rings, Toroidal Plasmas, Angular Momentum, Energy Conservation, Magnetic Flux, Plasma-Particle Interactions
Scientific paper
The Alfven-Arrhenius fall-down process is considered, and a mechanism is proposed whereby the 'Rosseland' electric field (the field needed to maintain quasi-neutrality) may be responsible for the capture and confinement of large-gyroradius dust particles within a plasma shell stratified along the direction of the magnetic-field lines. For these particles, the effect of the magnetic force is rather weak, and they move with a constant z component of the angular momentum in a one-dimensional equivalent potential (gravitational plus centrifugal). This has a maximum at the equator and a minimum at the '2/3' points (the points where the field-aligned components of the gravitational and centrifugal forces balance). It is shown that, under suitable initial conditions, these are points of maximum dust density and minimum plasma density. The plasma-planetisemal transition is therefore expected to take place at the '2/3' points in accordance with the Alfven-Arrhenius mechanism.
Azar Michael J.
Thompson William B.
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