Study of impurity transport in negative and positive triangularity plasmas H/F

Description du poste:

Description du poste

Domaine

Physique du noyau, atome, molécule

Contrat

Stage

Intitulé de l'offre

Study of impurity transport in negative and positive triangularity plasmas H/F

Sujet de stage

A plasma scenario for a future fusion reactor must demonstrate low core impurity contamination. To this end, this internship aims to develop an algorithm that determines the transport coefficients of metallic impurities by analyzing experimental measurements and solving the impurity transport equation.

Durée du contrat (en mois)

6

Description de l'offre

Nuclear fusion in a tokamak is a promising source of energy. However, a question arises: which plasma configuration is most likely to produce net energy? To contribute to answering this question, during this internship (and possible subsequent PhD), we will study the impact of magnetic geometry, comparison between positive and negative triangularity, on the collisional and turbulent transport of tungsten (W). The performance of a tokamak strongly depends on the energy confinement it can achieve. The latter degrades significantly due to turbulent transport and radiation, primarily from W. On ITER, the tolerated amount of W in the core of the plasma is just 0.3 micrograms in 800 cubic meters of plasma volume. Experiments have shown that the negative triangularity (NT) plasma geometry is beneficial for confinement as it significantly reduces turbulent transport. With this geometry, it is possible to reach confinement levels similar to those of the ITER high confinement configuration (H-mode in positive triangularity), without the need for a minimum power threshold and without the associated plasma edge relaxations. However, questions remain: what level of W transport is found in NT compared to a positive geometry? What level of radiation can be predicted in future NT reactors? To address these questions, the objective of this internship is to develop an algorithm that determines the impurity transport coefficients from experimental measurements and by solving the impurity transport equation.
The internship duration is 6 months.

Moyens / Méthodes / Logiciels

Algorithm development based on open-source impurity transport and radiation code AURORA.

Profil du candidat

Physics or engineering backgroud

Localisation du poste

Site

Cadarache

Localisation du poste

France, Provence-Côte d'Azur, Bouches du Rhône (13)

Ville

Saint paul lez Durance

Critères candidat

Langues

Anglais (Courant)

Possibilité de poursuite en thèse

Oui

Demandeur

Disponibilité du poste

16/03/2026