Dust charges, cloud potential, and instabilities in a dust cloud embedded in a plasma

Details Dust charges, cloud potential, and instabilities in a dust cloud embedded in a plasma Dust charges, cloud potential, and instabilities in a dust cloud embedded in a plasma

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.2281h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, March 1, 1987, p. 2281-2287. Research supported by the Norges Almenvi

Physics

132

Charged Particles, Comet Tails, Interplanetary Dust, Planetary Rings, Plasma-Particle Interactions, Boltzmann Distribution, Debye Length, Grain Size, Particle Density (Concentration), Plasma Density, Poisson Equation

Scientific paper

The authors consider a finite-sized dust cloud embedded in an infinite plasma. The dust cloud will generally be at a different potential from that of the ambient plasma, and particles which enter the cloud are accelerated or decelerated. The authors treat the two limiting cases: in case A, particles are not thermalized within the cloud, and in case B, the plasma is thermalized in the cloud interior to form a Maxwellian plasma with densities given by Boltzmann relations as functions of the local cloud potential. Qualitatively, both cases lead to similar results; they are discussed in detail. The authors expect semistable cases intermediate between case A and case B with multiple solutions to be found. Instabilities through the creation of double layers and transitions between two solutions may occur and lead to events in dust clouds. The authors suggest that such events may possibly occur in cometary comas and in planetary rings and lead to changes in the dust cloud structure. Conditions relevant for multiple solutions will probably be rather short-lived, at most a few times 10 days, before scattering collisions with diffusion in velocity space turn the plasma velocity distribution into that of case B.

Affiliated with

Also associated with

No associations

Rating

Dust charges, cloud potential, and instabilities in a dust cloud embedded in a plasma does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dust charges, cloud potential, and instabilities in a dust cloud embedded in a plasma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dust charges, cloud potential, and instabilities in a dust cloud embedded in a plasma will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1456879