B2.5-Eunomia simulations of Magnum-PSI detachment experiments: I. Quantitative comparisons with experimental measurements

Detachment experiments have been carried out in the linear plasma device Magnum-PSI by increasing gas pressure near target. In order to a proper detailed analysis of mechanism behind momentum and power loss detachment, quantitative match is pursued between B2.5-Eunomia solutions experimental data. B2.5 multi fluid code Eunomia Monte Carlo solver for neutral particles, they are coupled together provide steady-state solution distribution space. input parameters adjusted produce close replication beam measured without any puffing target chamber. Using this as an initial condition, exclusively increased during simulation, matching pressures experiments. Reasonable agreement found electron temperature simulation results with measurements using laser Thomson scattering The simulations also reveal effect on current, effectively reducing current penetration from source. capable reproducing detachment characteristics, namely along magnetic field reduction particle heat flux neutrals will allow future studies exact contribution individual plasma-neutral collisions energy Magnum-PSI.