Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Mechanical response to swift ion irradiation-induced nano-tracks in silica
Year:2015
Research Areas
  • Engineering
Information
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.
International
Si
JCR
Si
Title
NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH B
ISBN
0167-5087
Impact factor JCR
Impact info
Volume
352
Nucl. Instrum. Meth. B
Journal number
From page
145
To page
147
Month
SIN MES
Ranking
Q2 (mitad superior)
Participants
  • Autor: Angel Rodriguez Paramo (UPM)
  • Autor: Fernando Sordo Balbín (ESS Bilbao)
  • Autor: David Garoz
  • Autor: Ovidio Yordanis Peña Rodriguez (UPM)
  • Autor: Alejandro Prada Valverde (UPM)
  • Autor: J. Olivares (Centro de Micro-Análisis de Materiales UAM)
  • Autor: M.L. Crespillo (Centro de Micro-Análisis de Materiales UAM)
  • Autor: Jose Manuel Perlado Martin (UPM)
  • Autor: Antonio Juan Rivera de Mena (UPM)
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
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)