Generalized Diffusion Theory Calculations of the Edge Pedestal Density Profile

It has been shown [1] that momentum balance requires a pinch-diffusion form of the radial particle flux in the edge plasma. Combined with the particle conservation requirement, this implies that the particle density satisfies a generalized diffusion equation with a convective term. This equation will be solved numerically and compared with the measured density profile in a DIII-D H-mode shot. \vskip6pt \noindent [1] W.M. Stacey, Contrib. Plasma Phys. {\bf 48}, 94 (2008).