Conveners
Pedestal Stability and Control II: EX/6 & TH/5
- Gabriella Saibene (EU)
Mr
Colin Roach
(Culham Centre for Fusion Energy)
11/10/2012, 14:00
THC - Magnetic Confinement Theory and Modelling: Confinement
Oral Presentation
Plasma equilibria reconstructed from the spherical tokamak MAST, have sufficient resolution to capture plasma evolution during the short period between edge-localised-modes (ELMs). Immediately after the ELM steep gradients in pressure, P, and density, n_e, form a pedestal close to the separatrix, and then expand into the core. Local gyrokinetic analysis over the ELM cycle reveals the dominant...
Ms
Elena de la Luna
(EU)
11/10/2012, 14:20
EXC - Magnetic Confinement Experiments: Confinement
Oral Presentation
Since ITER is expected to operate at powers close to the H-mode threshold power scaling, it is important for ITER predictions to investigate the confinement and plasma dynamics in H-modes for heating powers marginally above the H-mode threshold power (P_{L-H}). The JET experience is that such operation leads to a transient behavior of the H-mode, with transitions from Type I ELMs to Type III...
Mr
Tianyang XIa
(China)
11/10/2012, 14:40
THD - Magnetic Confinement Theory and Modelling: Plasma–material interactions; divertors, limiters, scrape-off layer (SOL)
Oral Presentation
TH/5-2Ra: Five-field Peeling-Ballooning Modes Simulation with BOUT++
In this paper we report the simulations on ELMs with 5-field peeling-ballooning model using BOUT++ code. A minimum set of three-field two-fluid equations based on the peeling-ballooning (P-B) model with non-ideal physics effects is found to simulate pedestal collapse when using the BOUT++ simulation code [PRL, Vol 105,...
Mr
Larry R. Baylor
(USA)
11/10/2012, 15:00
EXC - Magnetic Confinement Experiments: Confinement
Oral Presentation
Pellet pacing of edge localized modes (ELMs), which is the triggering of rapid small ELMs by pellet injection, has been proposed as a method to prevent large ELMs that can erode the ITER plasma facing components [1]. D_2 pellet injection has been used on the DIII-D tokamak to successfully demonstrate for the first time the pacing of ELMs at a 10x higher rate than natural ELMs. The...
Mr
Nobuhiko Hayashi
(Japan)
11/10/2012, 15:20
THS - Magnetic Confinement Theory and Modelling: Stability
Oral Presentation
The reduction of ELM energy loss by the pellet injection for ELM pacing has been studied by an integrated core / scrape-off-layer / divertor transport code TOPICS-IB with a MHD stability code and a pellet model. In the ELM pacing, ELMs with the reduced energy loss should be reliably triggered by small pellets to minimize fueling and the impact on the target pedestal plasma. It is found that...
Mr
Weiwen Xiao
(China)
11/10/2012, 15:40
EXC - Magnetic Confinement Experiments: Confinement
Oral Presentation
EX/6-3Ra: ELM Mitigation by Supersonic Molecular Beam Injection: KSTAR and HL-2A Experiments and Theory
New experimental results of ELM mitigation by supersonic molecular beam injection (SMBI) are report in HL-2A and KSTAR. The experiments show that ELM frequency increase (f_ELM^SMBI/f_ELM^0~ 2-3.5) and an ELM amplitude decrease for a finite duration period during an SMBI influence time,...
