Abstract
ABSTRACTThe radiative rates and charge states of atoms in a high-temperature ( keV) plasma are of great interest for the research of the controlled fusion. In the current paper, new compact polynomial fits describing the coronal radiative cooling rates and the mean impurity charge are obtained for 11 elements: helium, lithium, beryllium, carbon, nitrogen, oxygen, neon, argon, krypton, xeon and tungsten. In the modern tokamak experiments, these elements are the most relevant impurity spices. In contrast to the previous works, the new fits are based on the most recent and complete atomic database Atomic Data and Analysis Structure. The manuscript presents coefficients for least-squares polynomial fits and compares them with the earlier known approximating formulae. These results can be extremely useful for system codes of fusion power plants, since they provide quick estimation of the radiation losses in the plasma.
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