Efficient algorithms for stochastic Stark-profile calculations

Algorithms to compute spectral line shapes including particle dynamics with a stochastic description of the plasma are proposed. Two stochastic models yielding different functional forms for the line shape are considered. The proposed algorithms are applied to the argon He-α and He-β lines plus associated lithium like dielectronic satellites at conditions typical of inertial confinement fusion experiments. These large-scale ion dynamics calculations using the proposed methods require significantly less computational effort than the corresponding quasi-static ion calculations with the conventional approach. It is stressed that the proposed algorithms do not introduce physical approximations to accelerate the calculations. In addition, the different behavior of the two stochastic models is explored. Finally, the examples suggest possible solutions to extant discrepancies between theoretical and experimental spectra.