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The effect of a non-uniform resistive wall on the stability of plasma MHD modes is examined. For the case of a tokamak plasma interacting with a wall possessing toroidally varying resistivity, the kink mode dispersion relation is found to reduce to a surprisingly simple form. The influence of a wall with toroidal gaps on tokamak plasma stability is investigated in some detail. Under some circumstances kink modes are found to explode through the gaps with ideal growth-rates. A similar investigation is made for a modular wall constructed of alternate thick and thin sections.

Additional information

Authors: FITZPATRICK R, AEA Fusion, Culham Laboratory, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: AEA FUS 246 EN (1993) 24 pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon. OX14 3DB (GB)
Record Number: 199311389 / Last updated on: 1994-11-28
Original language: en
Available languages: en