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Accueil > Groupes de recherche > Matériaux et Irradiation

Matériaux et Irradiation

The scientific activity of the team "Materials and irradiation (MIR)" is focused on materials for energy applications (mostly nuclear and photovoltaic energies), with a special emphasis put on the role played by ion beams, either to modify material properties and/or to generate extreme irradiation conditions and to characterize solids, for studies related to Solid State Chemistry and Physics.

For all these points (described below), we have an extensive use of the SCALP ion accelerator facility of the lab, and especially the JANNuS-Orsay part [1].

The different thematics are described below :

  1. Fundamental studies and modelling on particle-solid interactions
  2. Radiation effects in oxides and carbides (fuels, confinement and/or transmutation of radioactive waste)
  3. Behaviour of steels under ion irradiation and ion beam synthesis (structural materials for current and future fission and fusion reactors)
  4. Materials for photovoltaic energy

Why using ion beams ? Ion beams may be implemented for technological applications in many domains such as Physics, Chemistry, Electronics, Medicine, Earth and Environmental Sciences.

  • A pertinent application of ion beams is the simulation of radiation effects in materials that could be placed in severe radiative environments. This topic concerns the qualification of matrices used for the confinement and/or transmutation of nuclear waste (fission products, plutonium, minor actinides), and the evaluation of structure materials for nuclear reactors of the next generations (Gen IV and fusion). Such experiments are based on the possibility to use ions of various masses at energies ranging from a few tens of keV up to a few hundreds of MeV, covering thus a broad stopping power range. They allow the simulation of radiation effects due to the uranium fission by using swift heavy ions, or the disintegration of actinides by using low energy heavy ions and MeV alpha particles.
  • Another item concerns analysis techniques using low-energy ion accelerators (e.g. Rutherford Backscattering Spectrometry, RBS). These non-destructive techniques provide quantitative analyses of the elements located in the surface layer of a solid and give information on their depth distribution with a resolution of the order of a few tens of nanometres.
  • Low energy ion beams are also used for ion beam synthesis of out-of-equilibrium materials : ions are incorporated into a solid matrix and a subsequent thermal annealing usually favours the formation of nano-precipitates following the typical ion beam synthesis scheme.
  • A last item is using ion beams to modify the properties of materials, either from a fundamental point of view or for technological applications, such as in the field of energy production.

Au 1er juillet 2018, l’équipe est constituée de 8 permanents et plusieurs doctorants :

Membres permanents :

  • Aurélien Debelle Maître de conférences
  • Brigitte Décamps Directrice de Recherche CNRS
  • Frédérico Garrido Professeur des Universités
  • Aurélie Gentils Chargée de Recherche CNRS
  • Stéphanie Jublot-Leclerc Chargée de Recherche CNRS
  • Florian Pallier Ingénieur (Service Instrumentation)
  • Olivier Plantevin Maître de conférences
  • Lionel Thomé Directeur de recherche CNRS émérite

Doctorants :

  • Marion Bricout, 2017-2020
  • Olga Emelianova, 2016-2019
  • Xin Jin, 2017-2020
  • Martin Owusu-Mensah, 2016-2019

[1three of us are local contacts, and one is the scientific leader. JANNuS-Orsay consists in coupling a transmission electron microscope (TEM) to two ion accelerators, allowing in situ observation of single/dual ion beam effects in a solid material. JANNuS (Joint Accelerators for Nanosciences and Nuclear Simulation) is a multi-ion beam facility located on two sites Orsay and Saclay, managed by CNRS/IN2P3 and Université Paris-Sud for JANNuS-Orsay, and CEA/DEN for JANNuS-Saclay, and linked by a Grouping Scientific Interest (GIS) (http://jannus.in2p3.fr)