Graduate School in Nonlinear Science

Sponsored by the Danish Research Academy

MIDIT                               OFD                           CATS
Modelling, Nonlinear Dynamics       Optics and Fluid Dynamics     Chaos and Turbulence Studies
and Irreversible Thermodynamics     Risø National Laboratory      Niels Bohr Institute and 
Technical University of Denmark     Building 128                  Department of Chemistry
Building 321                        P.O. Box 49                   University of Copenhagen 
DK-2800 Lyngby                      DK-4000 Roskilde              DK-2100 Copenhagen Ø
Denmark                             Denmark                       Denmark


by Igor Ivonin, Vladimir Pavlenko and Hans Persson
Department of Space and Plasma Physics, Uppsala University, Sweden

Tuesday March 21, 2000, 13.00 h
at OFD-Meeting Room, Bld. 130,
Risø National Laboratory, Roskilde

Abstract: We will discuss the reasons and the consequences of the Turbulent EquiPartition (TEP) establishments of the magnetized electrons in a tokamak. The global TEP state can be considered as an attractor of distributions of the turbulent plasma in tokamak, because TEP distribution has unique property -- uniform in space distribution of the particle invariants. In particular, we will discuss in the kinetic description:

1) different radial profiles of the density in the TEP state for different kinds of the electrons (passing and trapped),

2) the temperature profiles for Ohmic heating regime,

3) generation of the turbulence due to TEP relaxation (due to collisions, instabilities), the rates of the turbulent mixing and the confinement time,

4) creation of the radial electric field, plasma rotation for different regimes (L-, H- modes)

Any special knowledge is not assumed.