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SOLPS-ITER modeling with activated drifts for a snowflake divertor in ASDEX Upgrade
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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.
IOP Publishing
Title: SOLPS-ITER modeling with activated drifts for a snowflake divertor in ASDEX Upgrade
Description:
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.
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