Non-diffusive transport of Inertial Heavy Impurities in Drift-Wave Turbulence

We investigate the transport behavior of tungsten impurities with finite inertia in drift-wave turbulence using the Hasegawa--Wakatani model. Unlike previous tracer-based models, our simulations reveal a transition to non-diffusive dynamics for a range of charge states. This novel mechanism offers a turbulence-driven route to core impurity accumulation. This finding underscores the nontrivial role of particle inertia in impurity dynamics and has strong implications for impurity control in future fusion devices such as ITER.