Plasma-neutrals simulations of linear configurations for PSI studies in reactor relevant regimes^q

Coupled fluid plasma and kinetic Monte Carlo neutrals simulations in a linear configuration are reported. The configuration mimics the tokamak divertor plasma channel contacting a target surface with nearby wall. We calculate the parameters of the source plasmas, 3-5 m from the target, required to produce high recycling target plasmas recently simulated for ITER. It is shown that the source plasma needs to deliver heat fluxes of 10-20 MW/m², ion fluxes of 10²³/m²/s, densities of 2-6 × 10 ¹⁹/m³, and electron and ion temperatures of 15-30 eV over a plasma radius of 5-6 cm. The neutral H and H₂ fluxes to the vessel wall are calculated to be comparable to those measured in the divertor regions of today's tokamaks. These results identify some design features for a prospective plasma material test station and the research required for this plasma source.