Speaker
Description
The full-f, gyrokinetic edge and scrape-off-layer turbulence code GENE-X has been coupled with the Monte Carlo neutral code Eirene. A kinetic treatment of the neutrals was chosen for the improved accuracy over fluid neutrals. This is particularly important for low collisionality regimes expected in reactors. It is impractical to call Eirene every GENE-X timestep, so the neutral source won’t update on turbulent timescales. The coupling uses a similar method as SOLPS-ITER: densities, temperatures, velocities, and particle fluxes are passed to Eirene; ion and electron particle, momentum and energy sources are passed from Eirene to GENE-X. Currently, the output from Gene-X is averaged toroidally when passed to Eirene and the Eirene output is copied to the different poloidal planes in GENE-X, but future work will change Eirene to a 3D grid. Initial results for a DIII-D case with and without neutrals will be presented.