DRF: Thesis SL-DRF-17-0113 - instn

DRF: Thesis SL-DRF-17-0113
RESEARCH FIELD
Plasma physics and laser-matter interactions / Corpuscular physics and outer space
TITLE
Impurity transport in the presence of a magnetic island
ABSTRACT
Present researches on fusion by magnetic confinement aim at producing electricity by confining with intense magnetic fields an ionised
medium (plasma) at temperatures one order of magnitude larger than that of stars, in a toroidal device called a tokamak. Instabilities can
develop in the form of magnetic islands that degrade the quality of energy confinement, and impact particle transport, in particular heavy
impurities. These are produced by the interaction of the hot plasma with plasma facing components, and it is mandatory that they stay
confined at the plasma periphery, because the radiative losses that they induce at plasma centre decrease the temperature and
jeopardize the realization of fusion reactions. However, the contamination by impurities is experimentally observed to be accelerated in
some cases in the presence of magnetic islands.
The aim of the PhD work is to understand, on the basis of a set of equations governing particle transport as well as with numerical tools,
how a magnetic island influences impurity transport, in order to clarify this crucial issue. How magnetic island control can mitigate this
transport will also be addressed. This work will be done in collaboration with the PIIM laboratory at Aix-Marseille University, and with the
Centre for Theoretical Physics (CNRS, Ecole Polytechnique) where the numerical tool is developed.
LOCATION
Institut de recherche sur la fusion par confinement magnétique
Service Chauffage et Confinement du Plasma
Transport Turbulence et MagnétohydroDynamique
Place: Cadarache
Start date of the thesis: 01/11/2017
CONTACT PERSON
Patrick MAGET
CEA
DRF/IRFM/SPPF/GTS
CEA/Cadarache
Bât. 513
13108 Saint Paul lez Durance
Phone number: +33 4 42 25 49 88
Email: [email protected]
UNIVERSITY / GRADUATE SCHOOL
Commissariat à l'énergie atomique et aux énergies alternatives
Institut national des sciences et techniques nucléaires
www­instn.cea.fr
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Aix-Marseille Université
Physique et Sciences de la Matière - Aix-Marseille Université -
FIND OUT MORE
http://irfm.cea.fr/
THESIS SUPERVISOR
Olivier AGULLO
Aix Marseille Université
UMR 7345 - LPIIM
PHYSIQUE des INTERACTIONS IONIQUES et MOLÉCULAIRES
UMR 7345 - Laboratoire PIIM
Campus de Saint-Jérôme
Aile 3, Service 322
Avenue Escadrille Normandie-Niémen
13397 Marseille cedex 20
Commissariat à l'énergie atomique et aux énergies alternatives
Institut national des sciences et techniques nucléaires
www­instn.cea.fr
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