Author/Authors :
Mordijck، نويسنده , , S. and Moyer، نويسنده , , R.A. and Evans، نويسنده , , T.E. and Bonnin، نويسنده , , X. and Canik، نويسنده , , J. and Coster، نويسنده , , D. and Groth، نويسنده , , M. and Maingi، نويسنده , , R. Travis Osborne، نويسنده , , T.H. and Owen، نويسنده , , L.W. and Petrie، نويسنده , , T.W. and Reiter، نويسنده , , D. and Watkins، نويسنده , , J.G. and Unterberg، نويسنده , , E.A.، نويسنده ,
Abstract :
In this paper, we investigate the role of wall conditions during the density pump-out observed in Resonant Magnetic Perturbation (RMP) experiments. We use a 2D fluid code, coupled to a neutral Monte-Carlo code (SOLPS5) to model a reference ELMing H-mode. Next we modify either the recycling at the target plates or the pumping efficiency at the pump entrance. This causes a change in upstream profiles, that alone cannot account for the shape change observed in the RMP H-mode. Therefore, the radial transport must be altered to match the RMP H-mode. By comparing the transport model for the ELMing H-mode and the RMP H-mode, we show that inside the separatrix an increase in transport is necessary to model the effects of the applied perturbed field in RMP H-mode.
