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Descripción
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| In this work we have used a combination of in situ reflectance to study structural modifications in silica by ion irradiation (Br ions with energies ranging from 5 to 40 MeV) and a methodology based on Molecular Dynamics (MD) and Finite Element Methods (FEM) to simulate its mechanical response to swift heavy ions. Reflectance measurements allowed us to obtain the detailed kinetics of surface modification and reconstruct the refractive index profiles in the irradiated samples, which lead us to very accurate results for the track radius and irradiation threshold of each ion. From these results we have observed that the refractive index increases at first (for low and medium fluences) but decreases for higher fluences. Finally, with the combination of MD and FEM simulations we obtained the local densification generated by an incoming ion and the strain and stress fields along the material as a function of the irradiation fluence. These results allowed us to reproduce track saturation for the low-medium fluence regime and the final decrease for the high fluence regime, which is produced by the plastic expansion induced by track irradiation during irradiation?enhanced viscous flow. | |
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Internacional
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No |
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Nombre congreso
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Industriales Research Meeting (IRM17) |
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Tipo de participación
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970 |
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Lugar del congreso
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Madrid (España) |
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Revisores
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Si |
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ISBN o ISSN
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978-84-16397-58-7 |
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DOI
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Fecha inicio congreso
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04/04/2017 |
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Fecha fin congreso
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05/04/2017 |
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Desde la página
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95 |
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Hasta la página
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95 |
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Título de las actas
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Proceedings |