Physics
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..799...38h&link_type=abstract
NEW VISTAS IN DUSTY PLASMAS: Fourth International Conference on the Physics of Dusty Plasmas. AIP Conference Proceedings, Volum
Physics
5
Dusty Plasmas, Plasma Interactions, Plasma Simulation, Computer Aided Analysis, Plasma Flow, Dusty Or Complex Plasmas, Plasma Crystals, Plasma Interactions, Particle-In-Cell Method, Atomic, Molecular, Ion, And Heavy-Particle Collisions
Scientific paper
The fundamental problem of the interaction of an isolated ion-absorbing sphere with a flowing collisionless plasma has been solved comprehensively for the first time, using a particle in cell code (SCEPTIC). Its results show the extent to which prior approximations affect such parameters as the particle charge, potential, ion-flux, drag, and wake structure. Several qualitatively new discoveries have been made, including: the substantial accuracy of the OML value of potential, but inaccuracy of the particle charge; reversal of the direction of asymmetry of the flux to the sphere; the rise of the ion drag force above prior analytic estimates by a factor of 2; the absence of extended oscillatory wakes, in contradiction of prior analytic predictions. These results constitute the basis for many of the dynamic parameters of dust particle interactions with the plasma and with each other.
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