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Scattering cold particles on an $N$-slit grating is shown to reproduce aninterference pattern, that manifests itself in the near-field region as thefractal Talbot carpet. In the far-field region the pattern is transformed to anordinary diffraction, where principal beams are partitioned from each other by($N-2$) weak ones. A probability density plot of the wave function, to berepresented by a gaussian wavepacket, is calculated both in the near-fieldregion and in the far-field one. Bohmian (geodesic) trajectories, to becalculated by a guidance equation, are superimposed on the probability densityplot well enough. It means, that a particle, moving from a source to adetector, passes across the grating along a single bohmian trajectorythrough-passing one and only one slit.  Keywords: Gaussian wavepacket, neutron scattering, guidance equation, bohmiantrajectory, near-field interference, far-field diffraction, Talbot carpet,fractal

N-Slit Interference: Fractals in Near-Field Region, Bohmian Trajectories