Active Control of Alfvén Eigenmodes by Externally Applied 3D Magnetic Perturbations

Gonzalez-Martin, J.; Garcia-Munoz, M.; Galdon-Quiroga, J.; Todo, Y.; Dominguez-Palacios, J.; Dunne, M.; Van Vuuren, A. Jansen; Liu, Y. Q.; Sanchis, L.; Spong, D.; Suttrop, W.; Wang, X.; Willensdorfer, M.; , ASDEX Upgrade Team; , EUROfusion MST1 Team

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Active Control of Alfvén Eigenmodes by Externally Applied 3D Magnetic Perturbations

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Title:	Active Control of Alfvén Eigenmodes by Externally Applied 3D Magnetic Perturbations
Author(s):	Gonzalez-Martin, J. ; Garcia-Munoz, M. ; Galdon-Quiroga, J. ; Todo, Y. ; Dominguez-Palacios, J. ; Dunne, M. ; Van Vuuren, A. Jansen ; Liu, Y. Q. ; Sanchis, L. ; Spong, D. ; Suttrop, W. ; Wang, X. ; Willensdorfer, M. ; , ASDEX Upgrade Team ; , EUROfusion MST1 Team
Date:	2023-01-20
Language:	en
Pages:	6 1-6
Department:	University of Seville National Institute for Fusion Science Max-Planck-Institut für Plasmaphysik General Atomics Department of Applied Physics Oak Ridge National Laboratory
Series:	Physical Review Letters, Volume 130, issue 3
ISSN:	0031-9007 1079-7114
DOI-number:	10.1103/PhysRevLett.130.035101
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Citation: Gonzalez-Martin , J , Garcia-Munoz , M , Galdon-Quiroga , J , Todo , Y , Dominguez-Palacios , J , Dunne , M , Van Vuuren , A J , Liu , Y Q , Sanchis , L , Spong , D , Suttrop , W , Wang , X , Willensdorfer , M , ASDEX Upgrade Team & EUROfusion MST1 team 2023 , ' Active Control of Alfvén Eigenmodes by Externally Applied 3D Magnetic Perturbations ' , Physical Review Letters , vol. 130 , no. 3 , 035101 , pp. 1-6 . https://doi.org/10.1103/PhysRevLett.130.035101
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 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.

Description: Funding Information: This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 and 2019–2020 under Grant Agreement No. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. The support from the Spanish Ministry of Science (Grant No. FPU15/06074) is gratefully acknowledged. The mega and ascot simulations reported herein were performed on the MARCONI cluster under the MEGAFILD project. \| openaire: EC/H2020/633053/EU//EUROfusion
Permanent link to this item: http://urn.fi/URN:NBN:fi:aalto-202302202130 Email this Export to RefWorks QR Code Print BibTex Tweet