[Barrières de transport externes dans les plasmas de fusion magnétique]
Cette revue présente la physique de la formation et du maintien des barrières de transport externes (ou barrières de bord) dans les plasmas magnétisés. La formation des barrières de bord est étudiée à travers les mécanismes de suppression du transport turbulent tels que le cisaillement de vitesse de dérive électrique (). Les résultats théoriques et expérimentaux sont comparés, en particulier ceux portant sur la dynamique des écoulements zonaux, qui jouent un rôle important dans la saturation et la régulation du transport turbulent. Les processus affectant l'évolution et la structure spatiale d'une barrière de bord sont décrits, avec une attention particulière pour la largeur de la barrière de transport.
The present level of understanding of the physics of the formation and sustainment of edge transport barriers in magnetically confined fusion plasmas is presented. The formation of edge transport barriers is studied through evolution of mechanisms which can suppress plasma turbulence and so reduce turbulent driven transport, such as flow shear stabilization of turbulence. Comparisons of theoretical studies with experimental results are described including investigations of zonal flows, which are considered important for saturation and self-regulation of turbulence and turbulence-driven transport. Processes that affect the dynamics and spatial structure of the edge barrier are described with emphasis on the width of the transport barrier.
Mot clés : Plasma de fusion magnétique, Barrière de transport externes
Punit Gohil 1
@article{CRPHYS_2006__7_6_606_0, author = {Punit Gohil}, title = {Edge transport barriers in magnetic fusion plasmas}, journal = {Comptes Rendus. Physique}, pages = {606--621}, publisher = {Elsevier}, volume = {7}, number = {6}, year = {2006}, doi = {10.1016/j.crhy.2006.06.006}, language = {en}, }
Punit Gohil. Edge transport barriers in magnetic fusion plasmas. Comptes Rendus. Physique, Volume 7 (2006) no. 6, pp. 606-621. doi : 10.1016/j.crhy.2006.06.006. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2006.06.006/
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