Experimental and Numerical Investigation of X-point
il y a 1 semaine
Domaine:
- Physique du noyau, atome, molécule
Contrat:
- Stage
Intitulé de l'offre:
- Experimental and numerical investigation of X-Point Radiator Scenarios in WEST and extrapolation to futu
Sujet de stage:
- Investigation of the Xpoint Radiator scenarios in WEST and extrapolation to future DTT device.
Durée du contrat (en mois):
- De 4 à 6 mois
Description de l'offre:
- The understanding and the control of plasmawall interaction and divertor regimes is crucial for the success of ITER and next step fusion devices. Recently many experimental studies have been performed to investigate the so called Xpoint Radiator regime consisting in a detached plasma with the majority of the power radiation localized around the Xpoint, thus decreasing the heat load on the divertor plates.
while detached divertor regime with clearly the majority of the radiation concentrated around the X-point is measured at the periphery of the plasma, similarly to the results in other tokamaks, an improved thermal confinement in the plasma core, for both electrons and ions, is observed.
- In this internship, we propose to investigate this issue analyzing experimental data with the help of numerical modelling, in particular using the code SOLEDGE3X-EIRENE in transport mode. The impact of drift velocities on the distribution of heat and particle fluxes on the divertor plates will be evaluated, as will that of ballooned radial transport as measured in experiments. Pure deuterium plasma simulations and simulations with nitrogen injection will be carried out. Comparison with Langmuir probe data and visible spectroscopy will be important to assess the relevance of these simulations. The simulations will enable us to study the transition between the attached plasma and the ""Xpoint radiator"" regime, its stability and robustness, also from a numerical point of view. Finally, the evolution of W sources during this transition will be studied in experimental and simulation data. An extrapolation of these results to future tokamaks such as DTT will be discussed at the end of the internship.
Moyens / Méthodes / Logiciels:
- SOLEDGE3X-EIRENE code, reduced analytical model for plasma transport, data analysis
- Ingénieur/master en physique (des plasmas ou fluides, théorique, etc.)Localisation du poste
Site:
- Cadarache
Localisation du poste:
- France, Provence-Côte d'Azur, Bouches du Rhône (13)
Ville:
- Saint Paul Lez Durance
Langues:
- Anglais (Courant)
Diplôme préparé:
- Bac+
- Master 2
Formation recommandée:
- Physique
Possibilité de poursuite en thèse:
- Oui
Disponibilité du poste:
- 01/02/2024
Entité de rattachement:
Le CEA est un acteur majeur de la recherche, au service des citoyens, de l'économie et de l'Etat.
- Il apporte des solutions concrètes à leurs besoins dans quatre domaines principaux : transition énergétique, transition numérique, technologies pour la médecine du futur, défense et sécurité sur un socle de recherche fondamentale. Le CEA s'engage depuis plus de 75 ans au service de la souveraineté scientifique, technologique et industrielle de la France et de l'Europe pour un présent et un avenir mieux maîtrisés et plus sûrs.
- Implanté au cœur des territoires équipés de très grandes infrastructures de recherche, le CEA dispose d'un large éventail de partenaires académiques et industriels en France, en Europe et à l'international.
- Les collaboratrices et collaborateurs du CEA partagent trois valeurs fondamentales:
- La conscience des responsabilités
- La coopération
- La curiosité
Référence :
Description de l'unité:
- "L'Institut de Recherche sur la Fusion par Confinement Magnétique est l'un des départements de la Direction de la Recherche Fondamentale du CEA.
Depuis plus de 50 ans, son rôle est de mener des recherches sur une nouvelle source d'énergie :
la fusion par confinement magnétique, en s'associant avec le programme Fusion européen. L'IRFM est installé sur le Centre CEA de Cadarache.
Les activités de L'IRFM sont structurées autour de trois axes de recherches de développement:
- contribuer à la réalisation du projet ITER et ceux de l'Approche Elargie (tokamak JT-60SA principalement),
- établir les bases du futur réacteur de fusion.
Ces activités sont intimement connectées à un effort tout particulier de formation des générations futures de physiciens et de technologues de la fusion.
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