Nonlinear structure in a current-carrying collisional dusty plasma
2008 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 15, no 9, 093702Article in journal (Refereed) PublishedText
A perpendicular ion drift is proposed as a possible mechanism for the generation of magnetic field structures in a highly collisional dusty plasma. The basic dissipation mechanism is assumed to be the dust-neutral momentum exchange, so that plasmas with a small ionization fraction are natural candidates for experiments. The model reduces to a nonlinear partial differential equation for the vector potential. The conditions for linear instability are presented. Possible stationary states are periodic arrangements for the magnetic field, described by a Lienard equation. The fully depleted (ion-dust) case is also considered in detail. Applications of the present work to magnetic field structures in planetary rings, comets, and low-temperature dusty plasma experiments are discussed. A necessary condition for the validity of the model is a sufficiently slow time scale of the generated magnetic fields in dusty plasmas.
Place, publisher, year, edition, pages
Melville: American Institute of Physics (AIP), 2008. Vol. 15, no 9, 093702
acoustic waves, ion plasma, instability, rings
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:umu:diva-117487DOI: 10.1063/1.2982494ISI: 000260031400061OAI: oai:DiVA.org:umu-117487DiVA: diva2:909607