Progress in modeling of krypton He-beta lineshape for diagnostics of high-energy-density plasmas

K-shell transitions of He-like species have been widely used to diagnose high-energy density plasmas, including those in the inertial-confinement fusion experiments. Recently, Stark broadening of the krypton He-beta line was used for inferring the electron density in NIF compressed capsules and suggested for diagnostics in Laser Mega-Joule experiments. Here, we report on the Stark lineshape modeling of Kr He-beta based on computer simulations that include electron penetration effects, resulting, in particular, in the consistent evaluation of the plasma polarization shift. Measuring the latter can serve as an independent method of plasma density diagnostics. Furthermore, Li-like satellites, contributing to the overall shape of the He-beta complex, were also calculated. (author)