Abstract
The theory of the fluctuation-driven radial electric field in toroidal geometry is presented. It is shown that the gyro-viscosity as well as the poloidal pressure gradient and parallel inertia provide significant contributions to the generation of the radial electric field. The neoclassical parallel viscosity modified by the inertia terms and fluctuation-driven transport is evaluated. The equations for the rotation of a turbulent tokamak plasma are derived.
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