NIFS-489

FULL TEXT (PDF, 302 KB)

Author(s):

T. Ohkawa

Title:

Pfirsch - Schluter Diffusion with Anisotropic and Nonuniform Superthermal Ion Pressure

Date of publication:

Apr. 1997

Key words:

Pfirsch-Schluter diffusion, superthermal ions, poloidal asymmetry. reduced transport

Abstract:

Pfirsch-Schluter diffusion rate is calculated for plasma with superthermal ions. When the pressure of the superthermal ions is not uniform on a flux surface, the diffusion rate is altered. Higher pressure at the outboard side enhances the rate while higher pressure at the inboard side reduces the rate. Pfirsch-Schluter current and diffusion change direction if the fractional increase of the pressure at the inboard side exceeds twice the inverse aspect ratio.

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