Emission spectra of quasistationary plasma of a random optical transparence. Low density plasma

The charge composition and emission of homogeneous low density iron plasma (N=1013 cm-3) in case of changes in plasma column radius R from 0 to 1020 cm are investigated. The transition from the optically transparent plasma to the plasma with substantial effect of reabsorption of plasma emission followed. The balance equations for all the ion charge sequence have been solved. It has been assumed that all plasma parameters, including the excited states of energy levels populations, are constant in the volume. The plasma emission spectrum has been calculated taking into account not only lines broadening but also their possible overlapping. On the base of this model the transition from coronal equilibrium to local thermodynamic plasma equilibrium is followed. The problems of photoprocesses effect including dielectron recombination, on the ionization composition in case of changes in optical density