TY - JOUR
T1 - Active Control of Alfvén Eigenmodes by Externally Applied 3D Magnetic Perturbations
AU - Gonzalez-Martin, J.
AU - Garcia-Munoz, M.
AU - Galdon-Quiroga, J.
AU - Todo, Y.
AU - Dominguez-Palacios, J.
AU - Dunne, M.
AU - Van Vuuren, A. Jansen
AU - Liu, Y. Q.
AU - Sanchis, L.
AU - Spong, D.
AU - Suttrop, W.
AU - Wang, X.
AU - Willensdorfer, M.
AU - ASDEX Upgrade Team
AU - EUROfusion MST1 Team
N1 - 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
PY - 2023/1/20
Y1 - 2023/1/20
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85147197675&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.130.035101
DO - 10.1103/PhysRevLett.130.035101
M3 - Article
AN - SCOPUS:85147197675
SN - 0031-9007
VL - 130
SP - 1
EP - 6
JO - Physical Review Letters
JF - Physical Review Letters
IS - 3
M1 - 035101
ER -