Radiative Power and Electron Cooling Rates for Oxygen in Steady-State and Transient Plasmas at Densities Beyond the Coronal Limit

摘要

We have developed a time-dependent, collisional-radiative model to calculate radiative power and electron cooling rates for oxygen at intermediate densities (10 exp 16 cm exp -3 less than or equal to n/sub e/ less than or equal to 10 exp 20 cm exp -3 ) where the usual coronal approximation is not valid. Large differences from coronal values are predicted. The behavior of the steady-state radiative power loss coefficient, L/sub Z, is investigated as the electron density is increased. Generalized power loss coefficients applicable to transient plasmas are derived and applied to ionizing and recombining oxygen plasmas. Time-dependent effects are found to play a large role both in terms of the total radiated power and the net electron energy loss rate. 41 refs., 11 figs. (ERA citation 11:018801)