Convective dust clouds in a complex plasma

Details Convective dust clouds in a complex plasma Convective dust clouds in a complex plasma

2008-08-13

arxiv.org/abs/0808.1830v1

Physics

Plasma Physics

4 pages, 6 figures, submitted to Phys. Rev. Lett

Scientific paper

The plasma is generated in a low frequency glow discharge within an elongated glass tube oriented vertically. The dust particles added to the plasma are confined above the heater and form counter-rotating clouds close to the tube centre. The shape of the clouds and the velocity field of the conveying dust particles are determined. The forces acting on the particles are calculated. It is shown that convection of the dust is affected by the convective gas motion which is triggered, in turn, by thermal creep of the gas along the inhomogeneously heated walls of the tube.

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