Convective and diffusive energetic particle losses induced by shear Alfvén waves in the ASDEX upgrade tokamak

M. García-Munoz; N. Hicks; R. Voornveld, van; I.G.J. Classen; R. Bilato; V. Bobkov; M. Bruedgam; H. -U. Fahrbach; V. Igochine; S. Jaemsae; M. Maraschek; K. Sassenheim

doi:10.1103/PhysRevLett.104.185002

Convective and diffusive energetic particle losses induced by shear Alfvén waves in the ASDEX upgrade tokamak

M. García-Munoz, N. Hicks, R. Voornveld, van, I.G.J. Classen, R. Bilato, V. Bobkov, M. Bruedgam, H. -U. Fahrbach, V. Igochine, S. Jaemsae, M. Maraschek, K. Sassenheim

Science and Technology of Nuclear Fusion

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Abstract

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.

Original language	English
Article number	185002
Pages (from-to)	185002-1/4
Number of pages	4
Journal	Physical Review Letters
Volume	104
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.104.185002
Publication status	Published - 2010

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García-Munoz, M., Hicks, N., Voornveld, van, R., Classen, I. G. J., Bilato, R., Bobkov, V., Bruedgam, M., Fahrbach, H. -U., Igochine, V., Jaemsae, S., Maraschek, M., & Sassenheim, K. (2010). Convective and diffusive energetic particle losses induced by shear Alfvén waves in the ASDEX upgrade tokamak. Physical Review Letters, 104(18), 185002-1/4. [185002]. https://doi.org/10.1103/PhysRevLett.104.185002

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title = "Convective and diffusive energetic particle losses induced by shear Alfv{\'e}n waves in the ASDEX upgrade tokamak",

abstract = "We present here the first phase-space characterization of convective and diffusive energetic particle losses induced by shear Alfv{\'e}n waves in a magnetically confined fusion plasma. While single toroidal Alfv{\'e}n eigenmodes (TAE) and Alfv{\'e}n 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.",

author = "M. Garc{\'i}a-Munoz and N. Hicks and {Voornveld, van}, R. and I.G.J. Classen and R. Bilato and V. Bobkov and M. Bruedgam and Fahrbach, {H. -U.} and V. Igochine and S. Jaemsae and M. Maraschek and K. Sassenheim",

year = "2010",

doi = "10.1103/PhysRevLett.104.185002",

language = "English",

volume = "104",

pages = "185002--1/4",

journal = "Physical Review Letters",

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publisher = "American Physical Society",

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García-Munoz, M, Hicks, N, Voornveld, van, R, Classen, IGJ, Bilato, R, Bobkov, V, Bruedgam, M, Fahrbach, H-U, Igochine, V, Jaemsae, S, Maraschek, M & Sassenheim, K 2010, 'Convective and diffusive energetic particle losses induced by shear Alfvén waves in the ASDEX upgrade tokamak', Physical Review Letters, vol. 104, no. 18, 185002, pp. 185002-1/4. https://doi.org/10.1103/PhysRevLett.104.185002

TY - JOUR

T1 - Convective and diffusive energetic particle losses induced by shear Alfvén waves in the ASDEX upgrade tokamak

AU - García-Munoz, M.

AU - Hicks, N.

AU - Voornveld, van, R.

AU - Classen, I.G.J.

AU - Bilato, R.

AU - Bobkov, V.

AU - Bruedgam, M.

AU - Fahrbach, H. -U.

AU - Igochine, V.

AU - Jaemsae, S.

AU - Maraschek, M.

AU - Sassenheim, K.

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.104.185002

DO - 10.1103/PhysRevLett.104.185002

M3 - Article

C2 - 20482185

VL - 104

SP - 185002-1/4

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 18

M1 - 185002

ER -

Convective and diffusive energetic particle losses induced by shear Alfvén waves in the ASDEX upgrade tokamak

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