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Quantifying Mixing using Magnetic Resonance Imaging
Published on: January 25, 2012
Magnetic shear damping of dissipative drift wave turbulence
1Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-85748 Garching, Germany.
Abstract:
The influence of local and global magnetic field line shear on structure formation and transport in dissipative drift-Alfvén turbulence is explored. It is found that the generation of zonal flow shear is connected to magnetic shear in ways not accounted previously. The concept of a locally sheared slab flux tube model (including toroidicity) is introduced in order to extend previous analyses to general local variations of magnetic field line shear. It is shown that local shear damping is efficient even when flux surface averaged shear is low.
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