Investigation of the Edge Plasma Parameters and Measurements of the Plasma Longitudinal Rotation Velocity by a Mach Probe in a Lithium Experiment on the T-11M Tokamak

The edge plasma parameters were measured by means of a Mach probe in a lithium experiment on the T-11M tokamak. The angular and radial distributions of the ion saturation current, along with the radial distribution of the electron temperature, were obtained in different modes of tokamak operation. T...

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Bibliographic Details
Published in:Plasma physics reports 2018-07, Vol.44 (7), p.657-663
Main Authors: Vasina, Ya. A., Shcherbak, A. N., Gasparyan, Yu. M., Mirnov, S. V.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Acoustic velocity
Atomic
Electron energy
Emitters
Emitters (electron)
Flow velocity
L-MODE PLASMA CONFINEMENT
LITHIUM
LITHIUM IONS
MAGNETIC FIELDS
MAGNETIC ISLANDS
Molecular
Optical and Plasma Physics
Parameters
Physics
Physics and Astronomy
PLASMA
PLASMA SCRAPE-OFF LAYER
Radial distribution
Rotating plasmas
Saturation
SPATIAL DISTRIBUTION
TOKAMAK DEVICES
Tokamaks
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Summary:The edge plasma parameters were measured by means of a Mach probe in a lithium experiment on the T-11M tokamak. The angular and radial distributions of the ion saturation current, along with the radial distribution of the electron temperature, were obtained in different modes of tokamak operation. The radial distributions of the electron temperature and ion saturation current in the main operating mode (L-mode) revealed a peak in the scrape-off-layer of the vertical limiter (lithium emitter), which can indicate the formation of a magnetic island in this region. The measured plasma flow velocity along the magnetic field was found to be close to one-half of the ion sound velocity for Li + ions.
ISSN:1063-780X
1562-6938
DOI:10.1134/S1063780X18070061