Kinetic Alfven eigenmodes in a hot tokamak plasma

Kinetic effects such as finite ion Larmor excursions and resonant Landau interactions are studied in the toroidicity Alfven eigenmode (TAE) range of frequencies. A new Alfven mode conversion mechanism is described taking place away from the resonances through toroidal mode coupling. It generates a group of kinetic Alfven eigenmodes (KAE) in the neighbourhood of each fluid eigenmode, with wavefields that extend throughout the plasma radius and could lead to substantial a particle losses. Comparisons carried out with measurements from the JET tokamak show that the multiple peaks observed on the response are KAE-induced in the neighbourhood of an elongation-induced Alfven eigenmode.


Published in:
Plasma Physics and Controlled Fusion, 39, 4, 547-552
Year:
1997
ISSN:
0741-3335
ISBN:
0741-3335
Keywords:
Laboratories:
SPC
CRPP




 Record created 2008-04-16, last modified 2018-09-13


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