  We perform numerical scattering experiments on a Lorentz array of disks
centered on a triangular lattice with L columns and study its transmission and
reflection properties. In the finite horizon case, the motion of the particles
may be modeled as simple one dimensional random walks with absorbing walls for
which the scaling of the transmission and reflection coefficients are known,
and agree with those found numerically. In the infinite horizon case the
analogy with a simple diffusive process is no longer valid. In this case we
compare our results with those expected for a one dimensional Levy walk, again
with absorbing walls, for which logarithmic corrections to the scaling
relations appear. The scaling with L and the symmetry properties of the forward
and the backward are also studied, and some of their salient features are
discussed.
