Dynamics of turbulent structures in the plasma edge
Event details
| Date | 09.09.2015 |
| Hour | 10:30 › 11:30 |
| Speaker | Dr. Olaf Grulke, MPI for Plasma Physics, Greifswald, D |
| Location |
PPB 019
|
| Category | Conferences - Seminars |
It is well known that the turbulent fluctuations in the edge of magnetically confined plasmas contribute considerably to the cross-field transport by the convection of particles and heat within the turbulent potential field. Over the last decade improved spatiotemporal diagnostics revealed a more comprehensive picture of the transport, i.e. the existence of radially propagating intermittent transport events, commonly called blob-filaments, which are routinely observed in the scrape-off layer of tokamaks and have been shown to even dominate the convective perpendicular particle transport. These events have attracted great interest, both experimental and theoretical, since they impact key issues as, e.g., scrape-off layer width, wall-recycling, and divertor heat load. Although common models for radial blob-filament propagation are based on magnetic field curvature a similar structure dynamics is also observed in linear magnetic geometry. This talk reviews the findings about structure propagation features in both magnetic field configurations based on results obtained in the Alcator C-Mod tokamak and the linear plasma device VINETA.
Practical information
- Informed public
- Free
Organizer
- Prof. P. Ricci
Contact
- Prof. P. Ricci