Published September 9, 2024
| Version v1
Publication
Active Control of Alfvén Eigenmodes by Externally Applied 3D Magnetic Perturbations
Description
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.
Abstract
European Union 633053Abstract
Gobierno de España FPU15/06074Additional details
Identifiers
- URL
- https://idus.us.es/handle//11441/162361
- URN
- urn:oai:idus.us.es:11441/162361
Origin repository
- Origin repository
- USE