Non-linear modeling of the plasma response to RMPs in ASDEX Upgrade

Abstract

The plasma response to Resonant Magnetic Perturbations (RMPs) in ASDEX Upgrade is modeled with the non-linear resistive MHD code JOREK, using input profiles that match those of the experiments as closely as possible. The RMP configuration for which Edge Localized Modes are best mitigated in experiments is related to the largest edge kink response observed near the X-point in modeling. On the edge resonant surfaces $q=m/n$, the coupling between the m + 2 kink component and the m resonant component is found to induce the amplification of the resonant magnetic perturbation. The ergodicity and the 3D-displacement near the X-point induced by the resonant amplification can only partly explain the density pumpout observed in experiments.

Submitted to Nuclear Fusion 18 pages (19 pages with Arxiv's compilation formatting), 13 figures

References in corpus (4)

• Effect of resonant magnetic perturbations on low collisionality discharges in MAST and a comparison with ASDEX Upgrade
• Coupling JOREK and STARWALL for Non-linear Resistive-wall Simulations
• Resonant magnetic perturbations and divertor footprints in poloidally diverted tokamaks
• Plasma response measurements of external magnetic perturbations using electron cyclotron emission and comparisons to 3D ideal MHD equilibrium

Cited by in corpus (8)

• The JOREK non-linear extended MHD code and applications to large-scale instabilities and their control in magnetically confined fusion plasmas
• ELM control with RMP: plasma response models and the role of edge peeling response
• The Role of Edge Resonant Magnetic Perturbations in Edge-Localized-Mode Suppression and Density Pump-out in low-collisionality DIII-D Plasmas
• Field-line localized destabilization of ballooning modes in 3D tokamaks
• Non-linear modeling of the threshold between ELM mitigation and ELM suppression by Resonant Magnetic Perturbations in ASDEX Upgrade
• Three dimensional boundary displacement due to stable ideal kink modes excited by external n=2 magnetic perturbations
• Comparing spontaneous and pellet-triggered ELMs via non-linear extended MHD simulations
• Numerical study of tearing mode seeding in tokamak X-point plasma