SOLPS-ITER modeling with activated drifts for a snowflake divertor in ASDEX Upgrade
O. Pan, T. Lunt, M. Wischmeier, D. Coster, U. Stroth
Abstract
Abstract We report on the first SOLPS-ITER simulations of a low-field side snowflake minus (LFS SF − ) divertor configuration with drifts fully activated in ASDEX Upgrade. Compared to a reference case without drifts, the simulation in normal toroidal magnetic field configuration ( B × ∇ B points to the primary X-point) shows a larger low-field-side/high-field-side asymmetry, an enhanced radial cross field transport, as well as a flux redistribution between the primary and secondary strike points. Although small compared to the total input power, power is found even on a strike point magnetically disconnected from the outer mid-plane, which is hard to explain by purely diffusive transport.
Topics & Concepts
DivertorASDEX UpgradeToroidAsymmetrySnowflakePhysicsMagnetic fieldToroidal fieldMechanicsNuclear engineeringNuclear physicsTokamakPlasmaEngineeringSnowQuantum mechanicsMeteorologyMagnetic confinement fusion researchSuperconducting Materials and ApplicationsFusion materials and technologies