2020-02781 - Post-Doctoral Research Visit F/M Development of a 3D finite element MHD code for Fusion plasma
Le descriptif de l’offre ci-dessous est en Anglais

Type de contrat : CDD

Contrat renouvelable : Oui

Niveau de diplôme exigé : Thèse ou équivalent

Fonction : Post-Doctorant

Niveau d'expérience souhaité : De 3 à 5 ans

A propos du centre ou de la direction fonctionnelle

The Inria Sophia Antipolis - Méditerranée center counts 34 research teams as well as 8 support departments. The center's staff (about 500 people including 320 Inria employees) is made up of scientists of different nationalities (250 foreigners of 50 nationalities), engineers, technicians and administrative staff. 1/3 of the staff are civil servants, the others are contractual agents. The majority of the center’s research teams are located in Sophia Antipolis and Nice in the Alpes-Maritimes. Four teams are based in Montpellier and two teams are hosted in Bologna in Italy and Athens. The Center is a founding member of Université Côte d'Azur and partner of the I-site MUSE supported by the University of Montpellier.

Contexte et atouts du poste

The current rate of fossil fuel usage and its serious adverse environmental impacts leads to an energy crisis accompanied by potentially disastrous global climate changes. Finding alternatives to the use of fossil fuel is therefore of utmost importance. Controlled fusion where energy is gained from the fusion of two light hydrogen isotopes is one of these most promising alternatives, as it relies on a potentially unlimited and clean source of fuel. This technology is therefore actively studied worldwide. Today the most successful concept to master fusion is magnetic confinement where an extremely hot ionized gas called plasma is confined in a toroidal chamber thanks to a very strong magnetic field. This concept initially pioneered by Russian physicists is studied in experimental devices called Tokamaks. One of these machines called ITER (for International Thermonuclear Experimental Reactor : https://www.iter.org/fr/org/io) is currently being build in Cadarache (France) thanks to an international agreement involving 35 different countries and will begin its activity in 2025.The physics of fusion plasma is extremely complex and its understanding requires a strong interaction between experiments, modeling and large scale numerical simulations. However, thanks to the increasing resources provided by parallel computing, huge progresses have been achieved and it is likely that in the time framework of the construction of ITER, the detailed simulation of some key-points for the operation of the machine will be possible. One of these key-point concerns the control of magneto-hydrodynamical (MHD) instabilities that develop in tokamaks. The numerical simulation of these phenomena is now in position to address the problem of the realistic representation of the three dimensional complex geometries of today tokamaks.

Within the framework of a partnership with CEA-IRFM, France, the Institue of Plasma Physics in Garching,  Germany and the CCFE (Culham Center for Fusion Energy), UK, the jorek team (https://www.jorek.eu/) develops one of the leading code dedicated to the simulation of MagnetoHydroDynamics (MHD)  instabilities in tokamaks in support of the ITER international program. The proposed job intends to add to the capabilities of the code, the use of 3D finite elements constructed by a tensor product of 2D C1 (continuously differentiable) with 1D cubic spline.

Regular travels between the laboratories involved in the developmet of the Jorek code are foreseen. Travel expenses will be covered within the limits of the scale in force.

Mission confiée

Assignments :
With the help of the jorek team and in particular of researchers of the CASTOR team in Sophia Antipolis, the recruited person will be responsible ot the development of a 3D finite element method and its implementation in the Jorek simulation code.

For a better knowledge of the proposed research subject :
Bibliography and scientific references on the Jorek simulation code are available at https://www.jorek.eu/

General references on nuclear fusion and the ITER program can be found at http://fusionwiki.ciemat.es/fusionwiki/index.php/Main_Page and https://www.iter.org/proj/inafewlines

Publications and the 2019 activity report of the Castor team are to be found at https://team.inria.fr/castor/fr/publications/ and https://raweb.inria.fr/rapportsactivite/RA2019/castor/uid0.html

Collaboration :
The recruited person will be in connection with the researchers of the Castor teams and in particular with Hervé Guillard, head of the team, Boniface Nkonga, professor at University Cote d'Azur, member of the Castor Team

Responsibilities :
The person recruited is responsible for the development of the 3D finite element method and its implementation in the Jorek Simulation code

Steering/Management :
The person recruited will be in charge of the supervision of internships involving M2 students.

Principales activités

Main activities (5 maximum) :

-Development of a 3D finite element method

-Implementation of the method in the Jorek simulation platform

-Validation of the method with reference to well-known test cases

-Running and analysis of simulations of MHD instabilities

Additional activities (3 maximum) :

  • Presentation of the method to the Jorek community
  • Presentation of the results in international conferences
  • Redaction of  technical reports and publications for peer review journals

Compétences

Technical skills and level required :

Fluent in English

Languages : Python, Fortran, gnumake and make

knowledge of svn or git will be an asset

Relational skills : capability to work with different partners

Avantages

  • Subsidized meals
  • Partial reimbursement of public transport costs
  • Leave: 7 weeks of annual leave + 10 extra days off due to RTT (statutory reduction in working hours) + possibility of exceptional leave (sick children, moving home, etc.)
  • Possibility of teleworking (after 6 months of employment) and flexible organization of working hours
  • Professional equipment available (videoconferencing, loan of computer equipment, etc.)
  • Social, cultural and sports events and activities
  • Access to vocational training
  • Social security coverage

Rémunération

Gross Salary: 2653 € per month