Measurement of sheared flows in the edge plasma of the CASTOR tokamak

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X09110087· OSTI ID:21443678

Brotankova, J; Stockel, J ^[1]; Horacek, J ^[2]; Seidl, J; Duran, I; Hron, M ^[1]; Oost, G Van ^[3]

---

1. Association EURATOM/IPP.CR, Institute of Plasma Physics AS CR, v.v.i. (Czech Republic)
2. Charles University in Prague, Faculty of Mathematics and Physics (Czech Republic)
3. Ghent University, Department of Applied Physics (Belgium)

The ion saturation current and floating potential are measured with high temporal (1 {mu}s) and spatial (2.5 mm) resolutions at the plasma edge of the CASTOR tokamak by two poloidally spaced radial arrays of Langmuir probes. The radial electric field and the phase velocity of plasma fluctuations are estimated. The position of the velocity shear layer (VSL) is localized with a high precision. The shearing rate {omega}{sub ExB} determined and found to be comparable with the inverse of the correlation time of fluctuations 1/{tau}{sub ac} outside the VSL and about five times higher in the proximity of the VSL. A small impact of the shear on fluctuation level at the VSL is observed also in the statistic parameters of the U{sub fl} and I{sub sat}.

• OSTI ID: 21443678
• Journal Information: Plasma Physics Reports, Vol. 35, Issue 11; Other Information: DOI: 10.1134/S1063780X09110087; Copyright (c) 2009 Pleiades Publishing, Ltd.; ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CASTOR TOKAMAK
ELECTRIC CURRENTS
ELECTRIC FIELDS
FLUCTUATIONS
IONS
LANGMUIR PROBE
PHASE VELOCITY
PLASMA
POTENTIALS
SHEAR
CHARGED PARTICLES
CLOSED PLASMA DEVICES
CURRENTS
ELECTRIC PROBES
PROBES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
VARIATIONS
VELOCITY