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

Nuclear Fushion

article

V.G. Kiptily¹  M. Fitzgerald¹  Ye.O. Kazakov²  J. Ongena²  M. Nocente³  S.E. Sharapov¹  M. Dreval⁵  Ž. Štancar⁷  T. Craciunescu⁸  J. Garcia⁹  L. Giacomelli⁴  V. Goloborodko^1,10  H.J.C. Oliver¹  H. Weisen^1,11 

[1] United Kingdom Atomic Energy Authority, Culham Centre for Fusion Energy, Culham Science Centre;Laboratory for Plasma Physics;Dipartimento di Fisica, Università di Milano-Bicocca;Institute for Plasma Science and Technology, National Research Council;Institute of Plasma Physics, National Science Center Kharkov Institute of Physics and Technology;V.N. Karazin Kharkiv National University;Jožef Stefan Institute;National Institute for Laser;CEA;Institute for Nuclear Research;Ecole Polytechnique Fédérale de Lausanne ,(EPFL), Swiss Plasma Center

关键词: tokamak;    fast-ions;    fusion-born alpha-particles;    MHD instabilities;   

DOI  :  10.1088/1741-4326/ac26a2

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

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.

【 授权许可】

Unknown