A comparison of SOLPS5.0 and 3D code EMC3-EIRENE for EAST double null configuration

The three-dimensional (3D) edge Monte Carlo code coupled with EIRENE (EMC3-EIRENE) was recently successfully implemented to the double null of EAST. The SOLPS5.0 code package has been used to investigate the validation and consistency of the 3D edge EMC3-EIRENE code on EAST. These two codes show a good agreement with each other with the average error less than 20%. However, there exist discrepancies for ne and Te profiles along target between calculations and measurements. The evaluation of kinetic corrections by heat flux limiters which is not included in EMC3-EIRENE has been presented in a low density discharge. With considering the correction of heat flux limit, the upstream ion density is strongly affected and the target parameters slightly increase and get closer to the experimental measurements. Our previous analysis of parameters sensitivity showed the most possible reason is uncertainty of the separatrix position [J. Huang et al., Plasma Phys. Control. Fusion 56(2014) 075023]. Agreement is achieved in both Te and ne at targets when the innermost separatrix shift ∼7 mm inward at outer midplane for both codes.