The problem of the propagation of a harmonic temperature perturbation in a plasma with both diffusive and nondiffusive energy transport is addressed. The energy flux is modeled by two (radially varying) effective coefficients for the diffusive and nondiffusive transport, and the effects of perturbed energy sinks and of cylindrical geometry are taken into account. A simple, local relationship is found between the two transport coefficients and the gradients of the phase and amplitude of the temperature perturbation. This relationship can be used for the interpretation of heating modulation experiments, provided data at different modulation frequencies are available. Since a harmonic density perturbation in a plasma follows a similar linearized transport equation, a similar model can be applied also to density modulation experiments.

Jacchia, A., Mantica, P., De Luca, F., & Gorini, G. (1991). Determination of diffusive and nondiffusive transport in modulation experiments in plasmas. PHYSICS OF FLUIDS. B, PLASMA PHYSICS, 3(11), 3033 [10.1063/1.859781].

Determination of diffusive and nondiffusive transport in modulation experiments in plasmas

GORINI, GIUSEPPE
1991-11

Abstract

The problem of the propagation of a harmonic temperature perturbation in a plasma with both diffusive and nondiffusive energy transport is addressed. The energy flux is modeled by two (radially varying) effective coefficients for the diffusive and nondiffusive transport, and the effects of perturbed energy sinks and of cylindrical geometry are taken into account. A simple, local relationship is found between the two transport coefficients and the gradients of the phase and amplitude of the temperature perturbation. This relationship can be used for the interpretation of heating modulation experiments, provided data at different modulation frequencies are available. Since a harmonic density perturbation in a plasma follows a similar linearized transport equation, a similar model can be applied also to density modulation experiments.
Articolo in rivista - Articolo scientifico
Scientifica
PLASMA CONFINEMENT, ENERGY TRANSPORT, TEMPERATURE DEPENDENCE, HEAT TRANSFER, PLASMA INSTABILITY, TRANSPORT PROCESSES, PERTURBATION THEORY, DIFFUSIVITY, CYLINDRICAL CONFIGURATION, WAVE PROPAGATION, MAGNETIC CONFINEMENT, SOURCES, SINKS, MODULATION INSTABILITY, MASS TRANSFER
English
Jacchia, A., Mantica, P., De Luca, F., & Gorini, G. (1991). Determination of diffusive and nondiffusive transport in modulation experiments in plasmas. PHYSICS OF FLUIDS. B, PLASMA PHYSICS, 3(11), 3033 [10.1063/1.859781].
Jacchia, A; Mantica, P; De Luca, F; Gorini, G
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/39160
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