SOLPS-ITER numerical evaluation about the effect of drifts in a divertor configuration of ASDEX-Upgrade and a limiter configuration of J-TEXT

Abstract

We performed SOLPS-ITER numerical simulation on the J-TEXT limiter tokamak with the activation of drifts. The simulation results are compared with ASDEX Upgrade divertor simulation results to evaluate the effect of drifts. Through a gas puffing rate scan, both attached and detached regimes were numerically obtained in the AUG divertor and J-TEXT limiter. The key plasma parameters in the J-TEXT limiter are evaluated with and without drifts that have a qualitative performance like AUG except the roll-over of the total ion flux at the targets. The drift effects on the target profiles are investigated for the maximum electron temperature of 15 eV and 5 eV at the outer targets for both devices. When the outer targets are attached in the J-TEXT limiter and AUG divertor, the drifts result in the partial detachment of the inner targets. In the detached regimes, the drifts decrease the electron temperature on AUG divertor targets. However, for the J-TEXT limiter, the electron temperature only decreases at the far SOL region at the inner target. The effect of drifts on the neutral density is also presented.