Conveners
Divertor & Exhaust Physics: EX/7 & PPC/1
- William Morris (Euratom/CCFE Fusion Association, UK)
Mr
Arne Kallenbach
(Germany)
10/17/14, 8:30 AM
Oral
To ensure a sufficient divertor lifetime ITER and a future DEMO reactor will operate under at least partial detachment (PD). PD is defined as a significant reduction of heat flux and pressure along field lines between mid-plane and divertor target for the first few power decay lengths in the scrape-off layer. For PD conditions in ASDEX Upgrade (AUG) the peak heatflux in the divertor is below 5...
Dr
Marco Wischmeier
(Germany)
10/17/14, 8:50 AM
Oral
Power exhaust is recognised to be one of the major challenges to achieving power generation by magnetically confined thermonuclear fusion. In order to reduce the power density conducted to the divertor targets to a level that can be tolerated by available technologies it will be necessary to radiate close to 100% of the exhaust power. Although it is foreseen that a significant fraction of this...
Mr
Hiroshi Kasahara
(Japan)
10/17/14, 9:10 AM
Oral
An ultra-long-pulse plasma with a duration time of 48 min, a line-averaged electron density of 1.2x10^19 m^-3, and electron and ion temperatures (Te, Ti) of 2 keV has been achieved by the averaged heating power (P_ECH+ICH) of 1.2 MW for helium plasma. The heating energy injected into plasma reached 3.36 GJ, which is a new world record in toroidal plasmas. Three types of ICRF antennas were...
Mr
Anthony W. Leonard
(USA)
10/17/14, 9:30 AM
Oral
Recent DIII-D results using the snowflake (SF) divertor configuration demonstrate that the SF geometry enables significant manipulation of divertor heat transport for power spreading in attached and radiative divertor regimes, between and during edge localized modes (ELMs), while maintaining good H-mode confinement. Enhanced heat transport through the low poloidal field null-point region and...
Mr
Egemen Kolemen
(USA)
10/17/14, 9:50 AM
Oral
Novel control schemes have been implemented at DIII-D to test and optimize heat-handling capabilities and burn regulation for advanced tokamaks. The topological instability of the snowflake (SF) configuration, which has a second-order null-point, motivated implementation of a control system to sustain the SF. We implemented the world’s first real-time SF detection and control system on DIII-D...
