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In recent years the analysis of impurity transport has revived interest in the neoclassical predictions against which the experimental data can be compared. The neoclassical theory of impurity transport has been summed up by Hirshman and Sigmar (H-S). However, approximate expressions for the neoclassical coefficients derived for particular asymptotic regimes have generally been used for comparison with the experimental results. An attempt is made to sketch the hierarchy in the numerous formulae of H-S, accounting for the Pfirsch-Schlüter coefficients and highlighting the conditions under which they reduce to the analytical approximations found in the literature. The full set of transport coefficients described has been implemented in a computer package, and examples of results are presented.

Additional information

Authors: LAURO TARONI L, JET Joint Undertaking, Abingdon, Oxon. (GB);GIANNELLA R, JET Joint Undertaking, Abingdon, Oxon. (GB);SPRINGMANN E, JET Joint Undertaking, Abingdon, Oxon. (GB);TARONI A, JET Joint Undertaking, Abingdon, Oxon. (GB);BITTONI E, ENEA, Centro di Calcolo, Bologna (IT)
Bibliographic Reference: Report: JET-R(91)10 EN (1991) 26 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199210247 / Last updated on: 1994-12-02
Original language: en
Available languages: en