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Tempest in a glass tube: A helical vortex formation in a complex plasma

Part of: Physics of Dusty Plasmas

Published online by Cambridge University Press:  07 August 2014

Yoshifumi Saitou  and
Osamu Ishihara
Yoshifumi Saitou*
Affiliation:
Faculty of Engineering, Utsunomiya University, Utsunomiya 321-8585, Japan
Osamu Ishihara
Affiliation:
Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan Institute of Science and Technology Research, Chubu University, Kasugai, 487-8501, Japan
*
†Email address for correspondence: [email protected]
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Abstract

A collective behavior of dust particles in a complex plasma with a magnetic field (up to 4 kG) is investigated. Dust particles form a dust disk which is rotating in a horizontal plane pushed by ions rotating with the E × B drift as a trigger force. The thickness of the disk is determined by controlling the experimental conditions. The disk rotates in a horizontal plane and forms a two-dimensional thin structure when the pressure pAr is relatively high. The dust particles are ejected from near the disk center and form a rotation in the vertical plane and, hence, forms a helical vortex when the disk is thick for relatively low pAr. The reason the dust disk has the different thickness is due to the neutral pressure. Under a higher (lower) neutral gas pressure, the disk becomes two (three) dimensional due to the influence of the neutral drag force.

Type
Research Article
Information
Journal of Plasma Physics , Volume 80 , Issue 6 , December 2014 , pp. 869 - 876
Copyright
Copyright © Cambridge University Press 2014 

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