Article
Active Control of Alfvén Eigenmodes by Externally Applied 3D Magnetic Perturbations
Author/s | Gonzalez Martin, Javier
García Muñoz, Manuel Galdón Quiroga, Joaquín Todo, Y. Domínguez Palacios Durán, Jesús José Dunne, M. Van Vuuren, Anton Jansen Liu, Y. Q. Sanchis, L. Spong, D. Suttrop, W. Wang, X. Willensdorfer, M. |
Department | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear Universidad de Sevilla. Departamento de Ingeniería Mecánica y de Fabricación |
Publication Date | 2023 |
Deposit Date | 2024-09-09 |
Published in |
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Abstract | The suppression and excitation of Alfvén eigenmodes have been experimentally obtained, for the first time, by means of externally applied 3D perturbative fields with different spatial spectra in a tokamak plasma. The applied ... The suppression and excitation of Alfvén eigenmodes have been experimentally obtained, for the first time, by means of externally applied 3D perturbative fields with different spatial spectra in a tokamak plasma. The applied perturbation causes an internal fast-ion redistribution that modifies the phase-space gradients responsible for driving the modes, determining, ultimately their existence. Hybrid kinetic-magnetohydrodynamic simulations reveal an edge resonant transport layer activated by the 3D perturbative field as the responsible mechanism for the fast-ion redistribution. The results presented here may help to control fast-ion driven Alfvénic instabilities in future burning plasmas with a significant fusion born alpha particle population. |
Funding agencies | European Union (UE) Gobierno de España |
Project ID. | 633053
FPU15/06074 |
Citation | Gonzalez Martin, J., García Muñoz, M., Galdón Quiroga, J., Todo, Y., Domínguez Palacios Durán, J.J., Dunne, M.,...,Willensdorfer, M. (2023). Active Control of Alfvén Eigenmodes by Externally Applied 3D Magnetic Perturbations. Physical Review Letters, 130 (3), 035101. https://doi.org/10.1103/PhysRevLett.130.035101. |
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