Formation of visco-dissipative vortex and quasi-neutrality breaking in a magnetoplasma

Masayoshi Tanaka, K. Nagaoka, A. Okamoto, S. Yoshimura, M. Kono

    Research output: Contribution to journalConference article

    1 Citation (Scopus)

    Abstract

    A monopole vortex with a density cavity in its core has been observed in a cylindrical magnetized plasma. It looks like an eye of a typhoon and is called "plasma hole". Velocity field measurement revealed that there exists a radially converging flow and the vorticity distribution is localized in the central hole region. This vorticity localization is identified as a Burgers vortex, which is intrinsic in viscous fluids and has never been observed in a plasma. The effective viscosity of the hole plasma determined by the characteristic scale length of the vorticity localization exhibits an extremely large value compared with the classical one. Potential measurements also revealed that the degree of non-neutrality is three orders of magnitude higher than that without the plasma hole. This result strongly suggests a correlation between the viscosity anomaly and the quasi-neutrality breaking.

    Original languageEnglish
    Pages (from-to)49-53
    Number of pages5
    JournalPhysica Scripta T
    VolumeT107
    DOIs
    Publication statusPublished - Dec 1 2004
    EventInternational Topical Conference on Plasma Physics: Complex Plasmas in the New Millennium - Santorini Island, Greece
    Duration: Sep 8 2003Sep 12 2003

    Fingerprint

    Neutrality
    Vortex
    Plasma
    vortices
    vorticity
    Vorticity
    viscosity
    Viscosity
    cylindrical plasmas
    Typhoon
    viscous fluids
    monopoles
    Monopole
    Viscous Fluid
    velocity distribution
    Length Scale
    Velocity Field
    Anomaly
    anomalies
    Cavity

    All Science Journal Classification (ASJC) codes

    • Atomic and Molecular Physics, and Optics
    • Mathematical Physics
    • Condensed Matter Physics

    Cite this

    Formation of visco-dissipative vortex and quasi-neutrality breaking in a magnetoplasma. / Tanaka, Masayoshi; Nagaoka, K.; Okamoto, A.; Yoshimura, S.; Kono, M.

    In: Physica Scripta T, Vol. T107, 01.12.2004, p. 49-53.

    Research output: Contribution to journalConference article

    Tanaka, Masayoshi ; Nagaoka, K. ; Okamoto, A. ; Yoshimura, S. ; Kono, M. / Formation of visco-dissipative vortex and quasi-neutrality breaking in a magnetoplasma. In: Physica Scripta T. 2004 ; Vol. T107. pp. 49-53.
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    AU - Kono, M.

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