1. Active Control of Alfvén Eigenmodes by Externally Applied 3D Magnetic Perturbations
- Author
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GONZALEZ-MARTIN, Javier, GARCIA-MUNOZ, Manuel, GALDON-QUIROGA, Joaquin, TODO, Yasushi, DOMINGUEZ-PALACIOS, Jesus, DUNNE, M., VAN VUUREN, A. Jansen, LIU, Yueqiang, SANCHIS, L., SPONG, Donald A., SUTTROP, W., WANG, X., WILLENSDORFER, Matthias, GONZALEZ-MARTIN, Javier, GARCIA-MUNOZ, Manuel, GALDON-QUIROGA, Joaquin, TODO, Yasushi, DOMINGUEZ-PALACIOS, Jesus, DUNNE, M., VAN VUUREN, A. Jansen, LIU, Yueqiang, SANCHIS, L., SPONG, Donald A., SUTTROP, W., WANG, X., and WILLENSDORFER, Matthias
- 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., source:Phys. Rev. Lett. 130, 035101, source:https://doi.org/10.1103/PhysRevLett.130.035101, identifier:0000-0002-3237-5195
- Published
- 2023