Radially global δf computation of neoclassical phenomena in a tokamak pedestal

Landreman, M. (author)

Parra, F. (author)

Catto, P. (author)

Ernst, D. (author)

Pusztai, Istvan, 1983 (author): Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

2014
2014
English.
In: Plasma Physics and Controlled Fusion. - 1361-6587 .- 0741-3335. ; 56:4, s. 045005-

Abstract Subject headings

Conventional radially-local neoclassical calculations become inadequate if the radial gradient scale lengths of the H-mode pedestal become as small as the poloidal ion gyroradius. Here, we describe a radially global δf continuum code that generalizes neoclassical calculations to allow for stronger gradients. As with conventional neoclassical calculations, the formulation is time-independent and requires only the solution of a single sparse linear system. We demonstrate precise agreement with an asymptotic analytic solution of the radially global kinetic equation in the appropriate limits of aspect ratio and collisionality. This agreement depends crucially on accurate treatment of finite orbit width effects.

By the author/editor: Landreman, M.; Parra, F.; Catto, P.; Ernst, D.; Pusztai, Istvan, ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Fusion Plasma an ...

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