Title :
Dust Streaming in Toroidal Traps
Author :
Reichstein, T. ; Wilms, J. ; Piel, Alexander
Author_Institution :
Inst. fur Exp. und Angewandte Phys., Christian-Albrechts-Univ., Kiel, Germany
Abstract :
Molecular dynamic simulations were performed to study the characteristics of particle flows in a toroidal trap driven by the ion drag under the influence of gravity, interparticle forces, and friction with a neutral gas background. This paper is focused on the influence of the driving force and the strength of friction on the dynamics of the dust flow and its different regimes. For small values of the ion drag, the particle flow exhibits instabilities with strong velocity fluctuations, while for high values of the ion drag, a quiescent particle flow is obtained. The transition from unstable flows to quiescent flows is studied in detail.
Keywords :
drag; dusty plasmas; molecular dynamics method; plasma fluctuations; plasma instability; plasma simulation; plasma toroidal confinement; plasma transport processes; dust flow; dust streaming; friction; gravity influence; interparticle forces; ion drag; molecular dynamic simulations; neutral gas background; particle flow instability; quiescent particle flow; toroidal traps; unstable-quiescent flow transition; velocity fluctuations; Drag; Electric shock; Friction; Gravity; Plasmas; Toroidal magnetic fields; Dusty plasma; instabilities; molecular dynamics (MD); transport processes;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2012.2222052
