Convective and Diffusive Energetic Particle Losses Induced by Shear Alfven Waves in the ASDEX Upgrade Tokamak

TitleConvective and Diffusive Energetic Particle Losses Induced by Shear Alfven Waves in the ASDEX Upgrade Tokamak
Publication TypeJournal Article
Year of Publication2010
AuthorsM. García-Muñoz, N. Hicks, R. van Voornveld, I.G.J. Classen, R. Bilato, V. Bobkov, M. Bruedgam, H.U Fahrbach, V. Igochine, S. Jaemsae, M. Maraschek, K. Sassenberg
JournalPhysical Review Letters
Volume104
Number18
Pagination4
Date PublishedMay
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000277417500030
KeywordsEIGENMODES, INSTABILITY, ION LOSS, MODES, PHYSICS, SIMULATION, TFTR, TRANSPORT
Abstract

We present here the first phase-space characterization of convective and diffusive energetic particle losses induced by shear Alfven waves in a magnetically confined fusion plasma. While single toroidal Alfven eigenmodes (TAE) and Alfven 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.

URL<Go to ISI>://000277417500030
Division

Fusion Physics

PID

ee2e14989e8a144e4fddcd51ef0ea88a

Alternate TitlePhys. Rev. Lett.

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