A collisional-radiative cooling model for light impurity elements in hot plasmas under non-equilibrium conditions
The power radiated by low-temperature high-density impurity inclusions in plasmas, such as the clouds surrounding ablating impurity pellets, or the vapour layers evolving over vapourizing 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. Results of representative scenario calculations pertaining to the ablation of carbon and neon pellets are presented.
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 250 (1997), pp. 96-102
Record Number: 199810325 / Last updated on: 1998-03-09
Original language: en
Available languages: en