NBI Power Loss Mechanisms at ASDEX Upgrade under Different Plasma Configurations
Event details
| Date | 02.10.2012 |
| Hour | 10:30 › 11:30 |
| Speaker | M. Cavedon, Universitá degli studi di Padova, Italy |
| Location |
PPB 019
|
| Category | Conferences - Seminars |
The behaviour of the NBI power loss mechanisms and of the supra-thermal energy fraction changes adopting different magnetic configurations, i.e. in the case of opposite signs of the toroidal magnetic field and plasma current. To estimate the energy confinement with sufficient accuracy, this has to be taken into account properly. New results on the NBI losses and suprathermal energy reconstruction in ASDEX Upgrade will be presented.
The power losses arising through different mechanisms have been evaluated on a large database of pseudo-discharges simulations made with TRANSP. Multiple regressions analysis of the beam losses have permitted to extend the old parametrisation in the conventional magnetic configuration and to provide a completely new one in the reversed magnetic configuration. The parametrisation has been validated against simulations of real ASDEX Upgrade discharges and, given its robustness, routinely implemented in the plasma energy confinement calculation. A first comparison of the confinement times in two similar discharges with opposite field signs will be presented.
The power losses arising through different mechanisms have been evaluated on a large database of pseudo-discharges simulations made with TRANSP. Multiple regressions analysis of the beam losses have permitted to extend the old parametrisation in the conventional magnetic configuration and to provide a completely new one in the reversed magnetic configuration. The parametrisation has been validated against simulations of real ASDEX Upgrade discharges and, given its robustness, routinely implemented in the plasma energy confinement calculation. A first comparison of the confinement times in two similar discharges with opposite field signs will be presented.
Practical information
- Informed public
- Free
Organizer
- CRPP