The Monte Carlo kinetic code EIRENE (Sect. 2) is used for simulating the behavior of neutral species in the edge of tokamak plasma and coupled with fluid plasma codes for a self-consistent description to be compared with measured experimental conditions. The data and visualization toolbox HYDKIN (Sect. 3) has been developed as a pre-processing tool for validation of those atomic and molecular (A &M) data used in EIRENE simulations, such as cross sections and reaction rates for plasma-neutral and neutral-neutral collisions. The restructuring that is being performed to increase HYDKIN readability and usability is here presented (Sect. 4).
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