Fig. 4: Pedestal modelling of the three types of ELM behaviours in DIII-D 190904.
From: A high-density and high-confinement tokamak plasma regime for fusion energy
a,b, Results for the type-I ELM in blue, the compound ELM in green and the small ELM in violet. a, Pedestal stability versus normalized pedestal current density (y axis) and normalized pressure gradient at the pedestal peak gradient location (x axis). jmax, jsep and ⟨j⟩ are the maximum pedestal current density, the current density at the separatrix and the average current density in the pedestal region, respectively. Stability boundaries are shown as solid lines. Experimental points are indicated as open squares with error bars. b, Linear mode growth rate (normalized by Alfvén frequency, ωA) at different toroidal mode numbers.
