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Study of the electron heat transport in Tore-Supra tokamak; Etude du transport de la chaleur electronique dans le Tokamak Tore Supra

Abstract

This work presents analytical solutions to the electron heat transport equation involving a damping term and a convection term in a cylindrical geometry. These solutions, processed by Matlab, allow the determination of the evolution of the radial profile of electron temperature in tokamaks during heating. The modulated injection of waves around the electron cyclotron frequency is an efficient tool to study heat transport experimentally in tokamaks. The comparison of these analytical solutions with experimental results from Tore-Supra during 2 discharges (30550 and 31165) shows the presence of a sudden change for the diffusion and damping coefficients. The hypothesis of the presence of a pinch spread all along the plasma might explain the shape of the experimental temperature profiles. These analytical solutions could be used to determine the time evolution of plasma density as well or of any parameter whose evolution is governed by a diffusion-convection equation. (A.C.)
Authors:
Publication Date:
Jul 01, 2004
Product Type:
Miscellaneous
Report Number:
INIS-FR-3578
Resource Relation:
Other Information: 7 refs; PBD: 2004
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANALYTICAL SOLUTION; DAMPING; DIFFUSION; ELECTRON TEMPERATURE; FOURIER HEAT EQUATION; PLASMA RADIAL PROFILES; TIME DEPENDENCE; TORE SUPRA TOKAMAK
OSTI ID:
20626312
Research Organizations:
Ecole Nationale Superieure des Arts et Metiers, 13 - Aix en Provence (France); CEA Cadarache, Dept. de Recherches sur la Fusion Controlee, 13 - Saint-Paul-lez-Durance (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR0502164069461
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
51 pages
Announcement Date:

Citation Formats

Harauchamps, E. Study of the electron heat transport in Tore-Supra tokamak; Etude du transport de la chaleur electronique dans le Tokamak Tore Supra. France: N. p., 2004. Web.
Harauchamps, E. Study of the electron heat transport in Tore-Supra tokamak; Etude du transport de la chaleur electronique dans le Tokamak Tore Supra. France.
Harauchamps, E. 2004. "Study of the electron heat transport in Tore-Supra tokamak; Etude du transport de la chaleur electronique dans le Tokamak Tore Supra." France.
@misc{etde_20626312,
title = {Study of the electron heat transport in Tore-Supra tokamak; Etude du transport de la chaleur electronique dans le Tokamak Tore Supra}
author = {Harauchamps, E}
abstractNote = {This work presents analytical solutions to the electron heat transport equation involving a damping term and a convection term in a cylindrical geometry. These solutions, processed by Matlab, allow the determination of the evolution of the radial profile of electron temperature in tokamaks during heating. The modulated injection of waves around the electron cyclotron frequency is an efficient tool to study heat transport experimentally in tokamaks. The comparison of these analytical solutions with experimental results from Tore-Supra during 2 discharges (30550 and 31165) shows the presence of a sudden change for the diffusion and damping coefficients. The hypothesis of the presence of a pinch spread all along the plasma might explain the shape of the experimental temperature profiles. These analytical solutions could be used to determine the time evolution of plasma density as well or of any parameter whose evolution is governed by a diffusion-convection equation. (A.C.)}
place = {France}
year = {2004}
month = {Jul}
}