Density Matrix Approach to Description of Doubly Excited States in Dense Plasmas

The density matrix approach allows to consider self-consistently the atomic kinetics and radiation dynamics in one closed system of equations. This approach is typical for laser physics, but for Stark broadening by plasmas it was introduced in the beginning of ninetieth. The present work is aimed on the specifics of such description for the located above ionization threshold doubly excited states (DES) of multiply charged ions. The Stark profiles of dielectronic satellites, originating from DES, play an important role in the diagnostic implementations. The existence of nonlinear interference effects (NIEF) in the Stark profiles of dielectronic satellites of multiply charged ions is demonstrated in the frames of the three-level model