Evidence for Alfvén eigenmodes driven by alpha particles in D-3He fusion experiments on JET

V. G. Kiptily; M. Fitzgerald; YE O. Kazakov; J. Ongena; M. Nocente; S. E. Sharapov; M. Dreval; Štancar; T. Craciunescu; J. Garcia; L. Giacomelli; V. Goloborodko; H. J.C. Oliver; H. Weisen

doi:10.1088/1741-4326/ac26a2

Evidence for Alfvén eigenmodes driven by alpha particles in D-³He fusion experiments on JET

V. G. Kiptily, M. Fitzgerald, YE O. Kazakov, J. Ongena, M. Nocente, S. E. Sharapov, M. Dreval, Štancar, T. Craciunescu, J. Garcia, L. Giacomelli, V. Goloborodko, H. J.C. Oliver, H. Weisen

Laboratory for Plasma Physics

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

Alfvén eigenmodes (AEs) driven by energetic alpha particles can lead to enhanced fast ion transport and losses, thereby degrading the plasma performance in ITER and future magnetic confinement fusion reactors. Unexpectedly, AEs with negative toroidal mode numbers, which are currently not considered for ITER, were observed in dedicated experiments with fusion-born alpha particles on the tokamak Joint European Torus (JET). The paper provides evidence for a complex interplay between fast ions, monster sawtooth crashes and AEs. Our results highlight the need for an improved description of the synergies between different fast ion phenomena in future burning plasmas.

langue originale	Anglais
Numéro d'article	114006
journal	Nuclear Fusion
Volume	61
Numéro de publication	11
Les DOIs	https://doi.org/10.1088/1741-4326/ac26a2
état	Publié - nov. 2021

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10.1088/1741-4326/ac26a2

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Kiptily, V. G., Fitzgerald, M., Kazakov, YE. O., Ongena, J., Nocente, M., Sharapov, S. E., Dreval, M., Štancar, Craciunescu, T., Garcia, J., Giacomelli, L., Goloborodko, V., Oliver, H. J. C., & Weisen, H. (2021). Evidence for Alfvén eigenmodes driven by alpha particles in D-³He fusion experiments on JET. Nuclear Fusion, 61(11), Article 114006. https://doi.org/10.1088/1741-4326/ac26a2

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title = "Evidence for Alfv{\'e}n eigenmodes driven by alpha particles in D-3He fusion experiments on JET",

abstract = "Alfv{\'e}n eigenmodes (AEs) driven by energetic alpha particles can lead to enhanced fast ion transport and losses, thereby degrading the plasma performance in ITER and future magnetic confinement fusion reactors. Unexpectedly, AEs with negative toroidal mode numbers, which are currently not considered for ITER, were observed in dedicated experiments with fusion-born alpha particles on the tokamak Joint European Torus (JET). The paper provides evidence for a complex interplay between fast ions, monster sawtooth crashes and AEs. Our results highlight the need for an improved description of the synergies between different fast ion phenomena in future burning plasmas.",

keywords = "MHD instabilities, fast-ions, fusion-born alpha-particles, tokamak",

author = "Kiptily, {V. G.} and M. Fitzgerald and Kazakov, {YE O.} and J. Ongena and M. Nocente and Sharapov, {S. E.} and M. Dreval and {\v S}tancar and T. Craciunescu and J. Garcia and L. Giacomelli and V. Goloborodko and Oliver, {H. J.C.} and H. Weisen",

note = "Publisher Copyright: {\textcopyright} 2021 Crown copyright. Reproduced with the permission of the Controller of Her Majesty's Stationery Office..",

year = "2021",

month = nov,

doi = "10.1088/1741-4326/ac26a2",

language = "English",

volume = "61",

journal = "Nuclear Fusion",

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TY - JOUR

T1 - Evidence for Alfvén eigenmodes driven by alpha particles in D-3He fusion experiments on JET

AU - Kiptily, V. G.

AU - Fitzgerald, M.

AU - Kazakov, YE O.

AU - Ongena, J.

AU - Nocente, M.

AU - Sharapov, S. E.

AU - Dreval, M.

AU - Štancar,

AU - Craciunescu, T.

AU - Garcia, J.

AU - Giacomelli, L.

AU - Goloborodko, V.

AU - Oliver, H. J.C.

AU - Weisen, H.

PY - 2021/11

Y1 - 2021/11

N2 - Alfvén eigenmodes (AEs) driven by energetic alpha particles can lead to enhanced fast ion transport and losses, thereby degrading the plasma performance in ITER and future magnetic confinement fusion reactors. Unexpectedly, AEs with negative toroidal mode numbers, which are currently not considered for ITER, were observed in dedicated experiments with fusion-born alpha particles on the tokamak Joint European Torus (JET). The paper provides evidence for a complex interplay between fast ions, monster sawtooth crashes and AEs. Our results highlight the need for an improved description of the synergies between different fast ion phenomena in future burning plasmas.

AB - Alfvén eigenmodes (AEs) driven by energetic alpha particles can lead to enhanced fast ion transport and losses, thereby degrading the plasma performance in ITER and future magnetic confinement fusion reactors. Unexpectedly, AEs with negative toroidal mode numbers, which are currently not considered for ITER, were observed in dedicated experiments with fusion-born alpha particles on the tokamak Joint European Torus (JET). The paper provides evidence for a complex interplay between fast ions, monster sawtooth crashes and AEs. Our results highlight the need for an improved description of the synergies between different fast ion phenomena in future burning plasmas.

KW - MHD instabilities

KW - fast-ions

KW - fusion-born alpha-particles

KW - tokamak

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DO - 10.1088/1741-4326/ac26a2

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JF - Nuclear Fusion

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