Turbulent enhancement of particle and heat fluxes during sawtooth oscillations in a tokamak edge plasma

Using Langmuir probes in the edge plasma of the TEXT tokamak we have identified sawtooth oscillations in density, potential, and temperature. Concurrent with the sawtooth oscillations are increases in the density and potential fluctuation levels which result in significant increases in the fluctuati...

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Bibliographic Details
Published in:Physical review letters 1990-07, Vol.65 (5), p.583-586
Main Authors: RHODES, T. L, RITZ, C. P, LIN, H
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102 - Fusion Energy- Plasma Research- Diagnostics
700108 - Fusion Energy- Plasma Research- Wave Phenomena
AMPLITUDES
AUGMENTATION
CLOSED PLASMA DEVICES
DATA
EDGE LOCALIZED MODES
ELECTRIC PROBES
ELECTROMAGNETIC RADIATION
ELECTRON TEMPERATURE
Exact sciences and technology
EXPERIMENTAL DATA
FLUCTUATIONS
HEAT FLUX
INFORMATION
INSTABILITY
IONIZING RADIATIONS
LANGMUIR PROBE
Magnetic confinement and equilibrium
NUMERICAL DATA
OSCILLATIONS
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
POTENTIALS
PROBES
RADIATIONS
SAWTOOTH OSCILLATIONS
SIGNALS
SOFT X RADIATION
TEXT DEVICES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE
VARIATIONS
X RADIATION
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Description
Summary:Using Langmuir probes in the edge plasma of the TEXT tokamak we have identified sawtooth oscillations in density, potential, and temperature. Concurrent with the sawtooth oscillations are increases in the density and potential fluctuation levels which result in significant increases in the fluctuation-driven particle flux and associated heat flux. No changes in the basic turbulence mechanism were observed during the sawtooth passage.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.65.583