Nonlinear structure in a current-carrying collisional dusty plasma

F. Haas, P.K. Shukla

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Abstract

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.
Original languageEnglish
Pages (from-to)093702-093702
Number of pages0
JournalPhysics of Plasmas
Volume15
Issue number9
DOIs
Publication statusPublished - Sep 2008

Keywords

  • collisional processes
  • dusty plasmas

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