Abstract
This paper presents a numerical method for solving in time the linearized drift-kinetic equation in toroidal geometry, in the local approximation; collisions are represented using a Lorentz model for pitch-angle diffusion. This method is applicable to computer simulations of dissipative trapped-electron modes in tokamaks, including the effects of magnetic curvature and gradient drifts. The accuracy, convergence, and numerical stability of the method are analyzed, and the results of computations verifying these analyses are given.
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