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The study of steady electron density profiles in the absence of external sources provides a convenient way of assessing the particle transport properties of the tokamak plasmas. Indeed, such a study in JET suggests a link between the ratio V/D (particle convective speed over particle diffusivity) and the safety factor (q) profile which represents the pitch of the magnetic field lines around magnetic surfaces. This result is in agreement with recent theoretical work. The evidence for this relation is given, together with a model of particle transport, including ions, which is compared with experimental results.

Additional information

Authors: BOUCHER D, JET Joint Undertaking, Abingdon, Oxon. (GB);REBUT P-H, JET Joint Undertaking, Abingdon, Oxon. (GB);WATKINS M, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(92)23 EN (1992) 12 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199211055 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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