First simulations of dissipative divertor conditions with resonant magnetic perturbations evaluated for the non-active phase in ITER

The application of external, symmetry breaking resonant magnetic perturbations (RMPs) is required for control of edge localized modes in ITER, yet its divertor has been designed under axisymmetric assumptions. Non-axisymmetric divertor conditions arise under RMP application where the perturbed separatrix guides field lines from the bulk plasma onto divertor plates, and are here modeled with the 3D edge plasma and neutral gas code EMC3-EIRENE. A linearization of the electron energy loss term from interactions with neutral gas has been implemented, providing numerical stable access to dissipative divertor conditions. Comparisons with SOLPS-ITER simulations for hydrogenic plasmas without impurities during the initial non-active low power phase show good agreement for a roll-over of the peak particle flux from increased gas-puffing. Subsequent simulations for RMP application are sensitive to assumptions on rotation in plasma response calculations by MARS-F, and show that detachment at the original strike zone can occur at lower gas-puff rates and lower peak particle flux distinct from the behavior at the non-axisymmetric strike point further away.