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Linear kinetic Monte Carlo particle transport models are frequently employedin fusion plasma simulations to quantify atomic and surface effects on the mainplasma flow dynamics. Separate codes are used for transport of neutralparticles (incl. radiation) and charged particles (trace impurity ions).Integration of both modules into main plasma fluid solvers provides then selfconsistent solutions, in principle. The required interfaces are far fromtrivial, because rapid atomic processes in particular in the edge region offusion plasmas require either smoothing and resampling, or frequent transfer ofparticles from one into the other Monte Carlo code. We propose a differentscheme here, in which despite the inherently different mathematical form ofkinetic equations for ions and neutrals (e.g. Fokker-Planck vs. Boltzmanncollision integrals) both types of particle orbits can be integrated into onesingle code. We show that the approximations and shortcomings of this "singlesourcing" concept (e.g., restriction to explicit ion drift orbit integration)can be fully tolerable in a wide range of typical fusion edge plasmaconditions, and be overcompensated by the code-system simplicity, as well as byinherently ensured consistency in geometry (one single numerical grid only) and(the common) atomic and surface process modules

Towards a unified linear kinetic transport model with the trace ion module for EIRENE