Community Research and Development Information Service - CORDIS


A large number of theoretical, heuristic and empirical models for transport in a tokamak have been developed. In spite of this, no single transport model has emerged as an obvious candidate for giving an accurate extrapolation from today's large tokamaks to a reactor. Three explanations for this situation are identified: (i) measurement errors; (ii) collinearities in the data; (iii) confinement degradation with power. It is proposed that transport models should be tested against data from experiments where only one dimensionless plasma parameter is being varied at a time. It is also shown that the testing of transport models should include data from two or more tokamaks of different sizes if model predictions are to be separated by more than the experimental measurement error level.

Additional information

Authors: CHRISTIANSEN J P, JET Joint Undertaking, Abingdon, Oxon. (GB);CORDEY J G, JET Joint Undertaking, Abingdon, Oxon. (GB);TARONI A, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(93)29 EN (1993) 25 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199310980 / Last updated on: 1994-11-29
Original language: en
Available languages: en