Simulation calculation of the ion-dynamic effect on overlapping neutral helium lines

Using a computer-simulation model, we have investigated ion dynamic effects on the spectral line shape of the neutral helium line 4471 A{}. For electron densities of arc plasma conditions (10¹⁵ cm^-3{≤}nₑ{≤}10¹⁶ cm^-3), our simulation profiles are compared with experimental profiles. We discuss our results in comparison with calculations based on the static ion approximation, and with results including ion-dynamic effects treated by the model microfield method or a generalized collision operator approach.