Configuration of Flows in a Cylindrical Plasma Device

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Author(s)

    • ITOH Kimitaka
    • Itoh Research Center for Plasma Turbulence, Kyushu University|Interdisciplinary Graduate School of Engineering Sciences, Kyushu University|National Institute for Fusion Science
    • URIU Kazuya
    • Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
    • KOBAYASHI Tatsuya
    • Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
    • INAGAKI Shigeru
    • Itoh Research Center for Plasma Turbulence, Kyushu University|Research Institute for Applied Mechanics, Kyushu University
    • SASAKI Makoto
    • Itoh Research Center for Plasma Turbulence, Kyushu University|Research Institute for Applied Mechanics, Kyushu University
    • NAGASHIMA Yoshihiko
    • Itoh Research Center for Plasma Turbulence, Kyushu University|Graduate School of Frontier Sciences, The University of Tokyo
    • YAMADA Takuma
    • Itoh Research Center for Plasma Turbulence, Kyushu University|Graduate School of Frontier Sciences, The University of Tokyo
    • FUJISAWA Akihide
    • Itoh Research Center for Plasma Turbulence, Kyushu University|Research Institute for Applied Mechanics, Kyushu University
    • ITOH Sanae-I.
    • Itoh Research Center for Plasma Turbulence, Kyushu University|Research Institute for Applied Mechanics, Kyushu University

Abstract

Ion flow is studied in the cylindrical magnetized Argon plasma of the PANTA device using several experimental methods. Time delay estimation technique (TDE) is used to measure the azimuthal propagation of density fluctuations between two electrostatic probes. Ion flux is also studied in azimuthal and axial direction using a newly installed Mach probe. TDE shows velocity profiles qualitatively consistent with expected drift wave propagation and <i>E </i>×<i>B </i>rotation. The Mach probe shows a maximum azimuthal flow and an axial flow shear close to the maximum density gradient and maximum fluctuation position. Striking differences exist in the detected axial ion flows depending on the discharge parameters. In high neutral pressure conditions reversal of axial ion flow was detected in the outer part of the plasma column. Temporal evolution of flows and fluctuations are compared as a first step to assess interplay between plasma turbulence and flows in the radial, axial and azimuthal directions.

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 7(0), 2401146-2401146, 2012

    The Japan Society of Plasma Science and Nuclear Fusion Research

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