PPPL-3374 is available in pdf or postscript formats. This document should be printed at 90‰ of size. Several equations extend to page edge.

Sheared-Flow Modes in Toroidal Geometry

J.L.V. Lewandowski, Z. Lin, W.W. Lee, and T.S. Hahm

Date of PPPL Report: October 1999

Accepted for publication in: Physics of Plasmas

Using a Fourier-Bessel representation for the fluctuating (turbulent) electrostatic potential, an equation governing the sheared-flow modes in toroidal geometry is derived from the gyrokinetic Poisson equation, where both the adiabatic and non-adiabatic responses of the electrons are taken into account. It is shown that the principal geometrical effect on sheared-flow modes of the electrostatic potential is due to the flux-surface average of 1/B, where B is the magnetic field strength.