Configuration of flows in a cylindrical plasma device

Stella Oldenbürger, Kazuya Uriu, Tatsuya Kobayashi, Shigeru Inagaki, Makoto Sasaki, Yoshihiko Nagashima, Takuma Yamada, Akihide Fujisawa, Sanae I. Itoh, Kimitaka Itoh

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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 installedMach probe. TDE shows velocity profiles qualitatively consistent with expected drift wave propagation and E × B rotation. TheMach 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.

Original languageEnglish
Article number2401146
JournalPlasma and Fusion Research
Volume7
Issue numberSPL.ISS.1
DOIs
Publication statusPublished - Dec 1 2012

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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