Mechanical response to swift ion irradiation-induced nano-tracks in silica

Rodriguez Paramo, Angel and Sordo Balbín, Fernando and Garoz Gómez, David and Peña Rodríguez, Ovidio Y. and Prada, A. and Olivares, J. and Crespillo Almenara, Miguel and Perlado Martín, José Manuel and Rivera, A. (2015). Mechanical response to swift ion irradiation-induced nano-tracks in silica. "Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms", v. 352 ; pp. 145-147. ISSN 0168-583X. https://doi.org/10.1016/j.nimb.2014.12.073.

Description

Title: Mechanical response to swift ion irradiation-induced nano-tracks in silica
Author/s:
  • Rodriguez Paramo, Angel
  • Sordo Balbín, Fernando
  • Garoz Gómez, David
  • Peña Rodríguez, Ovidio Y.
  • Prada, A.
  • Olivares, J.
  • Crespillo Almenara, Miguel
  • Perlado Martín, José Manuel
  • Rivera, A.
Item Type: Article
Título de Revista/Publicación: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Date: January 2015
ISSN: 0168-583X
Volume: 352
Subjects:
Faculty: Instituto de Fusión Nuclear (UPM)
Department: Ingeniería Energética
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Ion irradiation on dielectric materials produces several processes, such ionization and defect formation followed by a decay governed by thermal processes such as heat diffusion and atomic rearrangement. Finally in the irradiated region the mechanical properties are altered, strain and stress fields appear, a densification takes places and other properties such as the refractive index are affected. In order to simulate the mechanical response of silica to swift ion irradiation we use a methodology based on molecular dynamics (MD) and finite element methods (FEM). We use information from MD to obtain the local densification generated by an incoming swift ion. Finally we calculate the densification in the ion track using FEM. This method provides information on the strain and stress field along the material as a function of ion irradiation fluence. For this work an experimental campaign using Br ions from 5 to 50 MeV has been done at CMAM accelerator (Madrid). We measured the refractive index and we observe that for high fluences the refractive index decreases. The effect of the strain field on the density could explain the decrease in the refractive index. We check this hypothesis using our methodology coupling MD and FEM.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAIC-A-2011-0718UnspecifiedUnspecifiedUnspecified
Government of SpainMAT-2012-38541UnspecifiedUnspecifiedUnspecified
Government of SpainMAT2011-28379-C03-02UnspecifiedUnspecifiedUnspecified

More information

Item ID: 46103
DC Identifier: http://oa.upm.es/46103/
OAI Identifier: oai:oa.upm.es:46103
DOI: 10.1016/j.nimb.2014.12.073
Official URL: http://www.sciencedirect.com/science/article/pii/S0168583X14011033
Deposited by: Memoria Investigacion
Deposited on: 30 Apr 2019 11:31
Last Modified: 30 Apr 2019 11:31
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