Phase dynamics and locking of large-scale modes in plasma edge

Other conference contribution, 2024

The dynamic of local and non-local phase locking of large-scale modes leading to edge-localized modes (ELMs) are analyzed from the simulation data with the non-linear extended MHD code JOREK [1,2,3]. Phases are not stochastic as assumed in the Random Phase Approximation (RPA) models, and in contrast, the non-linear couplings result in the locking of the phases with non-local features. It is observed that the mode with the highest growth rate leading to an ELM crash, goes though a phase locking phase as the energy of the mode increases, followed by a phase mixing after the crash.