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Abstract

A novel type of ideal toroidal Alfvén eigenmode, localised in the low-shear core region of a tokamak plasma, is shown to exist, whose frequency is near the upper continuum of the toroidal Alfvén gap. This mode converts to a kinetic-type toroidal Alfvén eigenmode above a critical threshold that depends on aspect ratio, pressure gradient, and shear. Opposite to the usual ideal toroidal Alfvén eigenmode, this new mode is peaked in amplitude on the small-major-radius side of the plasma.

Additional information

Authors: VAN DAM J W, University of Texas at Austin, Institute for Fusion Studies (US);BORBA D ET AL., JET Joint Undertaking, Abingdon, Oxon. (GB);BERK H L, University of Texas at Austin, Institute for Fusion Studies (US)
Bibliographic Reference: Report: JET-P(95)12 EN (1995) 16 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199510916 / Last updated on: 1995-08-10
Category: PUBLICATION
Original language: en
Available languages: en
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