24th IAEA Fusion Energy Conference - IAEA CN-197

Session

Pedestal Stability and Control I

EX/TH

10 Oct 2012, 10:45

Conveners

Pedestal Stability and Control I: EX/3 & TH/2

• François Waelbroeck (USA)

355. EX/3-1: Advances in the Physics Understanding of ELM Suppression Using Resonant Magnetic Perturbations in DIII-D

Mr Mickey R. Wade (USA)

10/10/2012, 10:45

EXD - Magnetic Confinement Experiments: Plasma–material interactions; divertors; limiters; scrape-off layer (SOL)

Oral Presentation

Recent experiments on DIII-D have increased confidence in the ability to suppress edge localized modes (ELMs) using edge-resonant magnetic perturbations (RMPs) in ITER, including an improved physics basis of the edge response to RMPs as well as expansion of RMP ELM suppression to more ITER-like conditions. Experiments aimed at an improved physics understanding have revealed a complex plasma...

23. EX/3-2: Understanding ELM Mitigation by Resonant Magnetic Perturbations on MAST

Mr Andrew Kirk (UK)

10/10/2012, 11:05

EXD - Magnetic Confinement Experiments: Plasma–material interactions; divertors; limiters; scrape-off layer (SOL)

Oral Presentation

MAST is equipped with 18 coils (6 in the upper row and 12 in the lower row) for use in Resonant Magnetic Perturbation (RMP) ELM control experiments. These coils give considerable flexibility since they allow a range of toroidal mode numbers (up to n=6) but also allow improved alignment of the magnetic perturbations with the plasma equilibrium by allowing the phase of the applied field to be...

147. TH/2-1: Non-linear MHD Modelling of Rotating Plasma Response to Resonant Magnetic Perturbations

Ms Marina Becoulet (France)

10/10/2012, 11:25

THS - Magnetic Confinement Theory and Modelling: Stability

Oral Presentation

The application of Resonant Magnetic Perturbations (RMPs) demonstrated the possibility of total Type I ELM suppression or strong mitigation of the ELM size in many experiments motivating to use this method on ITER, where Type I ELMs represent a particular danger for Plasma Facing Components (PFC) and divertor materials. In the present work the rotating plasma response to RMPs was studied using...

614. EX/3-3: ELM Control in Application of Non-Axisymmetric Magnetic Perturbations in KSTAR

Mr Young Mu Jeon (Republic of Korea)

10/10/2012, 11:45

EXS - Magnetic Confinement Experiments: Stability

Oral Presentation

In 2011 KSTAR campaign, we successfully demonstrated an ELM suppression by applying small non-axisymmetric magnetic perturbations, which is the first achievement by using n=1 magnetic perturbations (MPs) [1] while DIII-D did by using n=3 MPs [2]. The ELM-suppressed MP discharges show several unique features such as two step ELM responses (intensification and then suppression) and a gradual...

52. EX/3-4: Mitigation of Edge Localised Modes with Small Non-axisymmetric Magnetic Perturbations in ASDEX Upgrade

Mr Wolfgang Suttrop (Germany)

10/10/2012, 12:05

EXC - Magnetic Confinement Experiments: Confinement

Oral Presentation

The ASDEX Upgrade tokamak is currently being enhanced with a set of in-vessel saddle coils to study the effects of non-axisymmetric magnetic perturbations. One of the most pronounced phenomena is the mitigation of Edge Localised Modes (ELMs) when n=2 perturbation fields are applied in High-confinement mode. In addition, the effects on the H-mode transition threshold, pellet injection,...