Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Molecular dynamics study of hydrogen isotopes migration in optics
Year:2007
Research Areas
  • Naval engineering
Information
Abstract
Fused silica is a material of interest due to its increasing number of applications in many different technology fields. In thermonuclear fusion it is one of candidate materials for both final focusing optics of laser for NIF and future inertial fusion reactors and diagnostics of the safety and Control Systems of the ITER machine as well as DEMO magnetic fusion reactors. In operation, these materials will be exposed to high neutron irradiation fluxes and it can result in point defect and optics properties degradation. In these works we present molecular dynamics simulations of displacement cascades due to energetic recoils in amorphous silica in simulation box without hydrogen atoms and with 1% of H atoms trying to identify defects formation. We have made statistics of the different kind of defects at different energy of primary knock-on atoms (PKA). The range of studied PKA energies are from 400 eV up to 3.5 keV and it is made to both components of this material Silicon and Oxygen atoms. In addition, the diffusion coefficients and mechanisms of H mobility in fused silica has been calculated and compared with those existing in the literature. Te interatomic potential developed by Feuston and Garofallini has been used in both studies
International
Si
Congress
Fifth International Conference on Inertial Fusion Sciences and Applications (ISA-07)
960
Place
Kobe (Japón)
Reviewers
No
ISBN/ISSN
Start Date
09/09/2007
End Date
14/09/2007
From page
To page
Participants
  • Participante: ANGEL IBARRA
  • Participante: J. MOLLA
  • Autor: Jose Manuel Perlado Martin (UPM)
  • Participante: MARIA JOSE CATURLA
  • Autor: Fernando Mota García (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
  • Departamento: Ingeniería Nuclear
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