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Title: Experimental observation of a tripolar vortex in a plasma
Authors: Okamoto, A ×
Hara, K
Nagaoka, K
Yoshimura, S
Vranjes, Jovo
Kono, M
Tanaka, MY #
Issue Date: 2003
Publisher: Amer inst physics
Series Title: Physics of plasmas vol:10 issue:6 pages:2211-2216
Abstract: A tripolar vortex, three aligned vortices with alternate signs of polarity of rotation, has been observed in a plasma for the first time. The tripolar vortex always appears with a deep density depression in the neutral particles, and the rotation direction of each vortex is opposite to that of the E x B rotation due to the ambipolar electric field. It is shown that a net momentum transfer during the charge-exchange interaction produces an effective force acting on the ions. The present experiment shows that this effective force may dominate the ambipolar-electric field and drive the anti-E x B vortical motion of ions. (C) 2003 American Institute of Physics.
URI: 
ISSN: 1070-664X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Plasma-astrophysics Section
× corresponding author
# (joint) last author

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