(a) Schematic representation of the coherent current structures (CS) inside a zoomed view into the turbulent volume. The current filamentation creates a mixture of reconnecting (red) and non reconnecting (blue) current sheets. A particle executes a fractal random walk inside the turbulent volume. (b) Typical trajectories from our simulations for several particles, marked with different colors. The particles interact with an ensemble of CSs that form a fractal with dimension D_F = 1.8 before they escape from the acceleration volume.