Intensity profile for particles with rigidities R = 10^-1 and a distance between the particle source and the detector of L = 100ℓ₀ in linear (upper panel) and logarithmic (lower panel) units. In the SPH kernel according to Eq. (4), the base smoothing length is varied between h = 0.5ℓ₀ and 3ℓ₀ (see legend). An additional influence on the smoothness of the curve can be obtained through the detector size. As illustrated, the smoothing length modifies the fluctuation of the intensity profile but otherwise leaves the underlying structure unchanged.