3D turbulence simulations of edge transport barrier dynamics and resonant magnetic perturbations
Event details
| Date | 06.06.2014 |
| Hour | 15:00 › 16:00 |
| Speaker | Prof. Peter Beyer, Université d'Aix Marseille, France |
| Location |
PPB 019
|
| Category | Conferences - Seminars |
Three dimensional fluid simulations of tokamak edge turbulence are presented. First, a transport barrier is generated by an externally driven sheared rotation. This barrier is found to relax quasi-periodically and each relaxation is associated with a strong heat burst. Externally imposed resonant magnetic perturbations (RMPs) are found to stabilize the barrier relaxations. The penetration of such RMPs in the turbulent plasma is studied within the self-consistent electromagnetic model. Stationary convection cells associated with magnetic islands are found to contribute significantly to the local heat transport. In a second part of the presentation, it is shown that spontaneous transport barrier generation can be reproduced by these 3D turbulence simulations. A key ingredient therein is the role on the radial electric field of collisional friction between trapped and passing particles.
Practical information
- Informed public
- Free
Organizer
- Prof. P. Ricci, CRPP
Contact
- Prof. P. Ricci, CRPP