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A diagnostic method for the determination of the neutral helium diffusion coefficient in the edge of magnetically confined fusion plasmas is developed on the basis of emission spectroscopy and population kinetics. The new collisional radiative numerical code SOPHIA showed that inter-combination transitions are extremely important to describe the qualitative and quantitative behaviour of the line emission and the population flow in diffusive plasmas. Corresponding simulations relevant for edge plasma conditions and the NAGDIS-II plasma simulator are discussed.

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Authors: FRITZSCHE S, Department of Physics, University Kassel, Kassel (DE);OHNO N, EcoTopia Science Institute, Nagoya University (JP);TAKAMURA S, Department of Energy Engineering and Science, Nagoya University (JP);ROSMEJ F B, PIIM-UMR 6633 CNRS/Université de Provence, Marseille (FR);STAMM R, PIIM-UMR 6633 CNRS/Université de Provence, Marseille (FR);KOUBITI M, PIIM-UMR 6633 CNRS/Université de Provence, Marseille (FR);MARANDET Y, PIIM-UMR 6633 CNRS/Université de Provence, Marseille (FR);CAPES H, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);LISITSA V S, Russian Research Center �Kurchatov Institute�, Moscow (RU);NISHIJIMA D, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE)
Bibliographic Reference: An article published in: Journal of Nuclear Materials 337-339 (2005) 1101-1105
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