Other
Scientific paper
Feb 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.2255y&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A2, p. 2255-2260
Other
15
Cometary Atmospheres, Cosmic Dust, Particle In Cell Technique, Plasma-Particle Interactions, Space Plasmas, Collisionless Plasmas, Distribution Functions, Electrostatic Charge, Grain Size, Two Dimensional Models
Scientific paper
Dusty plasmas are present in comets, in the ring systems of the outer planets, and in the interstellar medium. A two-dimensional particle-in-cell (PIC) model of a dusty plasma is presented in this paper. The PIC code is best suited for modeling the plasma-dust interaction for large grains, with diameters of the order of a centimeter. We have modeled the charging process for an individual dust grain and the associated potential pattern in the surrounding plasma. We have also considered the case of a large number of grains in a plasma, with intergrain separations of the order of the Debye length, and have shown that the plasma becomes depleted and the charge on a dust grain is reduced, as other workers in this field have predicted (cf. C. K. Goertz, 1989). We examine the electron and ion distribution functions in the vicinity of a charged grain and demonstrate that the ions near a grain have clearly been accelerated by the electrostatic potential.
Armstrong Thomas P.
Cravens Thomas E.
Friauf R. J.
Young Benjamin
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