The power radiated by low-temperature high-density impurity inclusions in plasmas, such as the clouds surrounding ablating impurity pellets, or the vapor layers evolving over vaporizing surfaces subjected to high-temperature plasmas, is calculated by means of a collisional-radiative (CR) model without the usual assumptions of equilibrium conditions. The populations of the ionization levels are determined by finite-rate calculations and, due to the much shorter characteristic times involved, instantaneous relaxation is assumed for the intermediate excitation levels considered. Data obtained with this model in the low-density limit are compared with those of Post-Jensen corona model [D.E. Post, R.V. Jensen et al., At. Data and Nucl. Data Tables 20 (1977) 397; R. Clark, J. Abdallah, D.E. Post, J. Nucl. Mater. 220-222 (1995) 1028; D.E. Post, J. Nucl. Mater. 220-222 (1995) 143]. Results of representative scenario calculations pertaining to the ablation of carbon and neon pellets are presented.
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Materials Science(all)
- Nuclear Energy and Engineering