A collisional-radiative study of low temperature tungsten plasma

摘要

A detailed fine-structure collisional radiative model with thousands of levels is developed to calculate the radiative properties of tungsten plasma in the low temperature range of 1-2 eV and a nominal ITER electron density of 1014 cm-3. A large configuration-average model is used to choose the important configurations for the fine-structure model. Calculations including the effect of configuration interaction and cross sections with various levels of approximation are compared. The calculations presented here should be of interest to the continuing efforts to model the radiative losses in large magnetic fusion devices, where relatively cold tungsten is found in the divertor region.