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

Journal Article · Fri May 07 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.185002· OSTI ID:21410675

Garcia-Munoz, M; Hicks, N; Bilato, R; Bobkov, V; Bruedgam, M; Fahrbach, H -U; Igochine, V; Maraschek, M; Sassenberg, K ^[1]; Voornveld, R van ^[2]; Classen, I G. J. ^[1]; Jaemsae, S ^[3]

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1. Max-Planck-Institut fuer Plasmaphysik, EURATOM Association Boltzmannstrasse 2, D-85748 Garching (Germany)
2. FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, P.O. Box 1207, 3430 BE Nieuwegein (Netherlands)
3. Helsinki University of Technology, Association Euratom-Tekes, P.O. Box 4100, FIN-02015 HUT (Finland)

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.

• OSTI ID: 21410675
• Journal Information: Physical Review Letters, Vol. 104, Issue 18; Other Information: DOI: 10.1103/PhysRevLett.104.185002; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
AMPLITUDES
ASDEX TOKAMAK
DIFFUSION
FLUCTUATIONS
IONS
PARTICLES
PHASE SPACE
PLASMA
SHEAR
CHARGED PARTICLES
CLOSED PLASMA DEVICES
HYDROMAGNETIC WAVES
MATHEMATICAL SPACE
SPACE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
VARIATIONS