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This paper reports on systematic L-mode studies performed in order to analyse the variability of impurity transport depending on operative conditions and operation parameters. Numerical simulations are presented for a particular pulse having all the operating parameters in the middle of the respective spanned regions. Plots of D(r) and V(r) for different discharges are presented to show their dependence on electron density, plasma current, total heating power and the effect of transient I(p) conditions for I(p) = 7 MA discharges. The diffusion coefficient outside the central region is analysed with regard to its dependence on the discharge parameters. A comparision is made of the reduced diffusivity of the inner plasma region with the neoclassical theory.

Additional information

Authors: GIANNELLA R ET AL., JET Joint Undertaking, Abingdon, Oxon. (GB);MATTIOLI M, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);PASINI D, European Commission, Bruxelles (BE)
Bibliographic Reference: Report: JET-P(93)81 EN (1993) 23 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199410329 / Last updated on: 1994-11-28
Original language: en
Available languages: en