Jena 2013 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 6: Magnetischer Einschluss II

P 6.1: Hauptvortrag

Dienstag, 26. Februar 2013, 14:00–14:30, HS 3

Off-diagonal transport in tokamak plasmas, the bridge from theory to experiments and from microscopic to macroscopic — •Clemente Angioni — Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, D-85748 Garching bei München, Germany

In the high temperature plasmas of tokamaks, the dominant part of the radial transport is provided by micro-turbulence, at ion and electron Larmor radius scales. The radial turbulent transport of particles and toroidal momentum is experimentally observed, and theoretically predicted, to be characterized by off-diagonal transport components, which cannot be attributed to the presence of density or rotation gradients respectively. These components are of high relevance for the achievement of fusion energy, since, at a macroscopic level, they determine the radial profiles of density and rotation. Furthermore, they are of extreme physical interest, since they are theoretically predicted to be determined by the characteristics of the micro-turbulence. A combined research, which assesses the correspondence between the observed behaviours of density and toroidal rotation and the theoretically predicted mechanisms of off-diagonal transport, provides an effective approach to shed light on the complex field of turbulence and transport in magnetized plasmas. By this, not only a bridge between theory and experiment is built, but also a correspondence between microscopic properties of the turbulence and macroscopic dependences of the plasma profiles is established. The main results of this research, performed at the Max-Planck-Institut für Plasmaphysik, are presented.