  We present options for visualizing contrast maps in 3D ion transmission
experiments. Simultaneous measurement of angular distributions and flight time
of ions transmitted through self-supporting, single-crystalline silicon foils
allows for mapping of intensity and different energy loss moments. The
transmitted projectiles were detected mainly for random beam-sample orientation
using pulsed beams of He ions and protons with incident energies 50 and 200
keV. Differences in contrast, observed when varying the projectile type and
energy, can be attributed to sample nuclear and electronic structure and bear
witness to impact parameter dependent energy loss processes. Our results
provide a base for interpretation of data obtained in prospective transmission
studies when for example using a helium ion microscope.
