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Published on: June 27, 2022
Contrast modes in a 3D ion transmission approach at keV energies
R Holeňák1, S Lohmann1, D Primetzhofer1
1Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden.
Abstract:
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.
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