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Abstract

The most important discrepancy between mixing-length estimates of the anomalous thermal conductivity and experimental values is in the radial dependence. This can be traced back to the estimate given for the radial correlation length L(r) of the turbulence, which is assumed to scale as the ion Larmor radius and therefore to decrease monotonically toward the edge. In this paper the radial correlation length of electrostatic turbulence is estimated both for moderate to high magnetic shear values (s = rq'/q, with q the safety factor), which characterise the outer part of a discharge, as well as for low s values, typical of the region around the magnetic axis.

Additional information

Authors: ROMANELLI F, ENEA, Centro Ricerche Energia Frascati, Roma (IT);ZONCA F, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Paper presented: 20th EPS Conference on Controlled Fusion and Plasma Physics, Lisboa (PT), July 26-30, 1993
Availability: Available from (1) as Paper EN 37550 ORA
Record Number: 199310878 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en