R-matrix calculations in support of diagnostics for fusion and astrophysical plasmas

While atomic data for the neutral stages of molybdenum and tungsten finds an important application when investigating the influx of impurities into magnetically confined fusion plasmas, atomic data for the low ion stages of iron facilitates the study of astrophysical plasmas across every corner of the universe.<br><br>To study the atomic structures of Mo I, W I, and Fe II we make use of sophisticated configuration interaction methods implemented by the well known computer packages GRASP0 and CIV3.

In addition, to accurately describe electron and photon collisions with these species we make use of relativistic and semi-relativistic R-matrix scattering methods implemented by the parallel Breit-Pauli R-matrix and Dirac R-matrix codes. We then employ collisional-radiative models, exploiting results from both the atomic structure and R-matrix calculations, to provide us with valuable diagnostic information about the plasma.