Dear Colleagues,
A 2 years post-doctoral position is offered in the framework of the
collaborative project WHeSCI (http://piim.univ-amu.fr/amidex/whesci),
financed by the A*MIDEX foundation (http://amidex.univ-amu.fr) and
proposed in the context of the International Thermonuclear Experimental
Reactor (ITER), the international project that aims to demonstrate the
technological and scientific feasibility of fusion energy with the
Tokamak design (http://www.iter.org).
The WHeSCI project seeks to describe the interactions of the fusion fuel
(deuterium (D) and tritium (T)) and ashes (helium (He) and neutron) with
the walls of the exhaust of the reactor (the divertor made of Tungsten,
W). The induced material properties modifications are indeed critical
for the reactor operation and safety and the successful operation of
ITER requires a detailed understanding of the plasma-wall interactions.
In this context, the post-doctoral fellow will be involved in the
further development of the MHIMS and HIIPC Macroscopic Rate Equation
(MRE) models [1-4], which are describing so far the D/T fuel trapping in
bulk metals, in absence or in presence of bubbles in the micrometre
range. In particular, he/she will study and implement synergistic
effects between D/T/He implantations and neutron-induced defects in
tungsten materials. Object Kinetic Monte Carlo (OKMC) simulations will
be used to obtain a dynamical insight onto temporal and thermal
evolution of D/T/He and defects in W. Ultimately, OKMC simulations will
provide information on bubble nucleation. The input parameters for the
OKMC code LAKIMOCA [5] will come from the literature but also from
several WHeSCI project partners: atomic-scale events energies and
attempt frequencies will come from DFT calculations, spatial
distribution of defects and D/T/He species will come from experiments.
Once bubble nucleation is understood, its growth will be investigated
with Finite Element Methods (FEM) [6]. Based on this numerical approach,
D/T/He trapping and bubble growth will be included in the MRE
simulations. This work will be done in close collaboration with a PhD
student at CNRS/LSPM who is currently developing the Abaqus Finite
Element Method (FEM) code as well as a staff of the CEA group working on
the MHIMS program.
The candidate should have a PhD in computational physics, a solid
background in solid state physics and show skills in the field of
metallic materials. At least one experience of OKMC or FEM simulations
is required. As the candidate will have to interact with the various
actors in the project, good oral and written communication skills are
necessary and the ability to work in a collaborative research
environment is essential. Knowledge of French would be appreciated but
is not mandatory.
The 1st year of the contract will be located in Lille (France) and will
focus on OKMC simulations with Charlotte Becquart (CNRS/UMET -
University Lille). The 2nd year will be located in Paris and will focus
on FEM and MRE implementations with Yann Charles and Jonathan Mougenot
(CNRS/LSPM - University Paris 13). Christian Grisolia (CEA/IRFM) will
coordinate the simulation work. The postdoctoral contract is financed by
the WHeSCI project (coordinated by Régis Bisson, Aix-Marseille
University/PIIM). Application is open until May 31 and the earliest
starting date is July 1 2018.
Questions should be sent directly to the following contact persons:
Christian Grisolia: [log in to unmask] / Laboratoire IRFM - CEA
Cadarache - 13115 Saint-Paul-lez-Durance
Charlotte Becquart: [log in to unmask] / Laboratoire
UMET- Université Lille 1 - 59655 Villeneuve d'Ascq
Yann Charles: [log in to unmask] - Jonathan Mougenot
[log in to unmask] / Laboratoire LSPM – Université Paris
13 – 93430 Villetaneuse
Régis Bisson: [log in to unmask] / Laboratoire PIIM –
Aix-Marseille University – 13013 Marseille
[1] E.A. Hodille et al Nucl. Fusion 57 076019 (2017)
[2] E.A. Hodille et al Phys. Scr. T167 014011 (2016)
[3] C. Sang et al Nucl. Fusion 52 043003 (2012)
[4] C. Quiros et al Nucl. Mat. Ener. 12 1178-1183 (2017)
[5] C.S. Becquart et al. J. Nucl. Mater. 403 75-88 (2010)
[6] Y. Charles et al IJHE 42 20336-350 (2017)
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