Convective and diffusive energetic particle losses induced by shear Alfvén waves in the ASDEX upgrade tokamak.
We present here the first phase-space characterization of convective and diffusive energetic particle losses induced by shear Alfvén waves in a magnetically confined fusion plasma. While single toroidal Alfvén eigenmodes (TAE) and Alfvén cascades (AC) eject resonant fast ions in a convective process, an overlapping of AC and TAE spatial structures leads to a large fast-ion diffusion and loss. Diffusive fast-ion losses have been observed with a single TAE above a certain threshold in the fluctuation amplitude.
García-Muñoz
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Max-Planck-Institut für Plasmaphysik, EURATOM Association Boltzmannstrasse 2, D-85748 Garching, Germany. Manuel.Garcia-Munoz@ipp.mpg.de
Hicks
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N
van Voornveld
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Classen
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IG
Bilato
R
R
Bobkov
V
V
Bruedgam
M
M
Fahrbach
H-U
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Igochine
V
V
Jaemsae
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Maraschek
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Sassenberg
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