DETAILED MODELING OF THE HYDROGENIC CARBON EXPANSION COOLED RECOMBINATION LASER

The agreement between experimental results and theoretical predictions is improved for the temporal dynamics of the gain coefficient on the 3 --> 2 transition of the C VI ion at 182 angstrom. It is shown that nj kinetics improves the description of radiative cleaning of the n = 2 level in a partially reabsorbed, expanding plasma, surprisingly increasing the degree of frozen ionization. A detailed description of radiative trapping on the n = 2, 3 levels is included in the model in the form of the net radiative bracket, calculated through an exact solution of the radiation transfer problem. The accurate treatment of radiative transport is found to convincingly verify the Sobolev formulation of the escape factor.