Details

Autor(en) / Beteiligte

• 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

Titel

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

Ist Teil von

• Physical review letters, 2023-01, Vol.130 (3), p.035101-035101, Article 035101

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2023

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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.