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Reduced-magnetohydrodynamic simulations of toroidally and poloidally localized edge localized modes
Ist Teil von
Physics of plasmas, 2012-08, Vol.19 (8)
Ort / Verlag
United States
Erscheinungsjahr
2012
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
We use the non-linear reduced-magnetohydrodynamic code JOREK to study edge localized modes (ELMs) in the geometry of the ASDEX Upgrade tokamak. Toroidal mode numbers, poloidal filament sizes, and radial propagation speeds of filaments into the scrape-off layer are in good agreement with observations for type-I ELMs in ASDEX Upgrade. The observed instabilities exhibit a toroidal and poloidal localization of perturbations which is compatible with the “solitary magnetic perturbations” recently discovered in ASDEX Upgrade [R. Wenninger et al., “Solitary magnetic perturbations at the ELM onset,” Nucl. Fusion (accepted)]. This localization can only be described in numerical simulations with high toroidal resolution.