Community Research and Development Information Service - CORDIS

Abstract

The MHD spectrum of circular cross-section tokamak plasmas with small aspect ratio is studied for low mode numbers. Particular attention is given to the continuous part of the ideal MHD spectrum of such plasmas. Poloidal mode coupling in finite aspect ratio tokamaks yields gaps in the Alfvén continuum. Global Alfvén modes are found with a frequency inside these gaps. The global Alfvén modes experience damping via phase-mixing by interacting with the continuum branches. This damping is computed in resistive MHD. It is shown that for asymptotically small resistivity the damping is finite and independent of eta.

Additional information

Authors: POEDTS S, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);SCHWARZ E, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);KERNER W, JET Joint Undertaking, Abingdon, Oxon. (GB);KEEGAN B, JET Joint Undertaking, Abingdon, Oxon. (GB);GOEDBLOED J P, FOM Instituut voor Plasmafysica, Rijnhuizen, Nieuwegein (NL);HUYSMANS G T A, FOM Instituut voor Plasmafysica, Rijnhuizen, Nieuwegein (NL)
Bibliographic Reference: Report: JET-P(92)03 (1992) 44 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199210755 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top