Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
In situ monitoring and modeling the optical properties of silica irradiated with swift heavy ions
Year:2017
Research Areas
  • Nanomaterials,
  • Description,
  • Interaction mechanisms,
  • Optical properties,
  • Engineering
Information
Abstract
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.
International
No
Congress
Industriales Research Meeting (IRM17)
970
Place
Madrid (España)
Reviewers
Si
ISBN/ISSN
978-84-16397-58-7
Start Date
04/04/2017
End Date
05/04/2017
From page
95
To page
95
Proceedings
Participants
  • Autor: Pablo Díaz Núñez (UPM)
  • Autor: Ovidio Yordanis Peña Rodriguez (UPM)
  • Autor: Angel Rodriguez Paramo (UPM)
  • Autor: Alejandro Prada Valverde (UPM)
  • Autor: Antonio Juan Rivera de Mena (UPM)
  • Autor: Fernando Sordo Balbin (UPM)
  • Autor: Jose Manuel Perlado Martin (UPM)
  • Autor: Miguel Crespillo (Centro de Micro-Análisis de Materiales (CMAM-UAM))
  • Autor: José Olivares (Centro de Micro-Análisis de Materiales (CMAM-UAM) y Instituto de Óptica (CSIC))
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión
  • Centro o Instituto I+D+i: Instituto de Fusión Nuclear
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