Nonlinear ideal MHD simulations of plasma eruptions: towards a predictive model for ELM size
Event details
| Date | 25.10.2013 |
| Hour | 14:30 › 15:30 |
| Speaker |
Prof. H. Wilson University of York, York, UK |
| Location |
PPB 017
|
| Category | Conferences - Seminars |
Nonlinear ideal MHD simulations for the gravitational instability in a plasma slab will be reported, which show four phases: an initial transient, a linear phase, a "quasi-linear" phase and an eruption. We compare simulations close to linear marginal stability with those deeper into the unstable region and find differences in the quasi-linear phase, where a reduction in the instantaneous growth rate is found compared to the linear regime, prior to the subsequent eruption. Hints of a subcritical instability driven by nonlinear effects are found in this quasi-linear phase, which suggest a new predictive model for ELM size.
Preliminary results for the new model, which retains full tokamak geometry, will be presented.
Preliminary results for the new model, which retains full tokamak geometry, will be presented.
Practical information
- Expert
- Free
Organizer
- Prof. P. Ricci
Contact
- Prof. P. Ricci