Computation

ERO2.0

The ERO2.0 code is a fully parallelized 3D kinetic Monte Carlo code developed at Forschungszentrum Juelich [1] to model plasma-wall interactions (PWI) and impurity transport in a full reactor sized volume. The capabilities included in this code over its predecessor allow the modeling of 3D effects on particle transport such as those encountered in resonant magnetic perturbation (RMP) scenarios. In addition, wall shaping can introduce non-axisymmetric effects on PWI processes, which can be considered when performing large sector/full volume simulations. As an initial step the code utilizes sputtering and reflection (i.e. SDTrimSP, molecular dynamics) databases to calculate the number of eroded and deposited particles that result from impact of the plasma background. The resulting fluxes are used to create test particles which are traced (either full orbit or guiding center approximation) with the inclusion of drifts, diffusion, and atomic processes (i.e. ionization, recombination, emission). The code is used to model PWI in many major devices all across the world such as ITER, W7-X, DEMO, EAST, WEST, FNSF and DIIID (Figure 1). This work was funded in part by the U.S. Department of Energy under grant DE-SC0020284 and DE-SC00013911.

ERO chart

Figure 1. Sample erosion/deposition map for the DIIID lower divertor during an L-mode discharge for a 0° RMP phasing.

 

[1] J Romazanov et al 2017 Phys. Scr. 2017 014018