  We study radial particle transport in stellarator plasmas using cryogenic
pellet injection. By means of perturbative experiments, we estimate the
experimental particle flux and compare it with neoclassical simulations.
Experimental evidence is obtained of the fact that core depletion in helical
devices can be slowed-down even by pellets that do not reach the core region.
This phenomenon is well captured by neoclassical predictions with DKES and
FORTEC-3D.
