Tripolar vortex in a plasma

Atsushi Okamoto, Kennichi Nagaoka, Shinji Yoshimura, Jovo Vranješ, Shinichiro Kado, Mitsuo Kono, Masayoshi Y. Tanaka

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


A tripolar vortex is spontaneously generated in a magnetized plasma. The flow velocity field of ions has been measured with a directional Langmuir probe, exhibiting the tripolar structure in vorticity distribution. The most remarkable feature of the tripolar vortex is that the polarity of rotation of each vortex is opposite to that of E × B drift. It is found that the charge-exchange process with inhomogeneous background neutrals produces an effective force, which dominates the electric field and drives the plasma into anti-E × B rotation.

Original languageEnglish
Pages (from-to)452-453
Number of pages2
JournalIEEE Transactions on Plasma Science
Issue number2 I
Publication statusPublished - 2005 Apr
Externally publishedYes


  • Charge-exhange interaction
  • Inhomogeneity of background neutrals
  • Partially ionized plasma
  • Tripolar vortex
  • Vorticity

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


Dive into the research topics of 'Tripolar vortex in a plasma'. Together they form a unique fingerprint.

Cite this