Nearly equidistant single swift heavy ion impact sites were made on fused silica with 70 MeV Ag irradiation through nanoporous alumina masks. The aluminum-embedded 10 μm through-pore ordered nanoporous alumina membranes were fabricated by constant voltage anodization in oxalic acid with a two-step replication process. An apparatus and a method were developed to achieve the alignment of the pores parallel to the high energy heavy ion beam direction within a ±0.25˚ range. The impact sites pattern was recorded on fused silica and was observed with atomic force microscopy. The impact sites display hillocks and show a nearly equidistant pattern .The recorded 0.85x10⁻⁴/nm² ion impact sites density is consistent with our predictions

Xavier Cauchy*, Université de Montréal, Canada
Sjoerd Roorda, Université de Montréal, Canada
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*presenting author