8.3.: Prols TRB de n/n, pour le tritium et les pour les électrons. La source de densité étant externe pour les deux espèces ,
URL : https://hal.archives-ouvertes.fr/pasteur-01370962
avec des concentrations relatives de l'ordre de 10 ?2 , sont susamment faibles pour ne pas perturber sensiblement le prol de densité électronique (ce qui a été vérié avec la réectométrie) ; de plus la turbulence n'est probablement pas aectée par l'injection car aucune modication du signal de la réectométrie de uctuations n'a été observée ,
centre du plasma choisie pour les simulations est ainsi environ 4 fois plus élevée que la valeur expérimentale ,
Ce résultat est en bon accord qualitatif avec la modélisation du transport d'impuretés eectuée avec le code ITC [18] (g. 9.1) Comme on peut s'y attendre, la diusivité et la vitesse de pincement sont plus forts dans la zone de gradient (0, les gradients -moteurs de la turbulence -y étant plus forts (ce qui est également conrmé par les mesures de uctuations de densité) ,
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