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Density Asymmetry and Marfe Localization in Tokamak Edge

The effect of tokamak toroidal geometry on producing edge density and parallel flow asymmetries and its influence on Marfe localization are studied. In the presence of a large poloidal rotation, the density asymmetry is peaked at the high field side of tokamak edge and this becomes the seed of a condensation process, which triggers a Marfe there finally.