Flux surface shaping effects on tokamak edge turbulence and flows

Alexander Kendl (1) , B.D Scott (2)

1 Institut für Theoretische Physik
2 IPP - Max-Planck-Institut für Plasmaphysik [Garching]

The influence of shaping of magnetic flux surfaces in tokamaks on gyrofluid edge turbulence is studied numerically. Magnetic field shaping in tokamaks is mainly due to elongation, triangularity, shift and the presence of a divertor X-point. A series of tokamak configurations with varying elongation 1 <=kappa <= 2 and triangularity 0 <= delta <= 0.4, and an actual ASDEX Upgrade divertor configuration are obtained with the equilibrium code HELENA and implemented into the gyrofluid turbulence code GEM. The study finds minimal impact on the zonal flow physics itself, but strong impact on the turbulence and transport.

Domains: Plasma Physics [physics.plasm-ph]

Alexander Kendl, B.D Scott. Flux surface shaping effects on tokamak edge turbulence and flows. 2004. ⟨hal-00001823⟩