<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Investigation of hyper-velocity impacts of micron- and submicron- sized particles on mineral targets by confocal laser microscopy"^^ . "To understand the surface evolution of atmosphereless moons and asteroids, a modified van de Graaff accelerator was used to conduct hyper-velocity impacts on mineral surfaces. This study is primary focusing on impact data of an olivine target, which was bombarded with Cu projectiles (Projectile diameter DP = 0.01–3.18 μm; v = 0.45–13 km/s within 3σ). In addition, also samples of the carbonaceous chondrite Allende CV3, a basaltic achondrite (NWA 6966), antigorite and pyroxenes were bombarded. Instead of conventional scanning electron microscopy (SEM) a confocal laser scanning microscope (LSM) was used for the first time. The LSM investigations are nondestructive and can be conducted without any coating. The imaging techniques of the LSM allow visualizing topographies and generating 3D-illustrations of impact structures. It could be demonstrated that besides cratering a significant proportion of projectiles remain stuck in the surface or produced flat indentations. Craters in olivine and diopside showed wide radial fractures and spallation effects. Only at high impact energies the formation of crater lips occurs, while spallation effects decrease. The results of the olivine target differ from other materials like soda lime glass (SLG) or fused quartz (FQ), or metal. The LSM is able to verify pronounced cavities on olivine surfaces, with a diameter to depth ratio (D/d) of -0.40 ± 24 %. It was possible to measure both deep and also very shallow impact structures with a few 10 nm resolution. On semi-transparent surfaces it is possible to see shock effects in the mineral targets, as an effect of light diffraction. Even though the LSM is able to measure surface structures at the sub-micron scale, the limit of safe identification of crater-structures is at diameters of D ~1 µm."^^ . "2017" . . . . . . . "Massimo Leonardo"^^ . "Guglielmino"^^ . "Massimo Leonardo Guglielmino"^^ . . . . . . "Investigation of hyper-velocity impacts of micron- and submicron- sized particles on mineral targets by confocal laser microscopy (PDF)"^^ . . . "M.Guglielmino - 2017 - PhD Thesis (v1.0 digital).pdf"^^ . . . "Investigation of hyper-velocity impacts of micron- and submicron- sized particles on mineral targets by confocal laser microscopy (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Investigation of hyper-velocity impacts of micron- and submicron- sized particles on mineral targets by confocal laser microscopy (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Investigation of hyper-velocity impacts of micron- and submicron- sized particles on mineral targets by confocal laser microscopy (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Investigation of hyper-velocity impacts of micron- and submicron- sized particles on mineral targets by confocal laser microscopy (Other)"^^ . . . . . . "small.jpg"^^ . . . "Investigation of hyper-velocity impacts of micron- and submicron- sized particles on mineral targets by confocal laser microscopy (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #23678 \n\nInvestigation of hyper-velocity impacts of micron- and submicron- sized particles on mineral targets by confocal laser microscopy\n\n" . "text/html" . . . "550 Geowissenschaften"@de . "550 Earth sciences"@en . .