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- W3023021665 abstract "One dimensional plasma model of the divertor leg in Large Helical Device is presented. The plasma is described by stationary fluid equations for electron and ion with particle source by ionization and momentum sink by charge exchange with neutrals. Also a simple model of neutral atoms and radiative cooling by impurities are included. This model is intended to be employed in an integrated simulation where an equilibrium of the upstream plasma and plasma-surface interactions at the divertor plate are solved in different numerical codes separately. From the computational point of view, the numerical code solving the fluid equations for the divertor leg is developed for 1D flux tube where the boundary conditions of both ends are specified. The calculation time is much less than 0.1 seconds and sufficiently fast to use in future integrated simulations. Solutions for typical plasma parameters are shown in the paper. In the results, a density peaking near the wall was observed for the plasma of high density. The peaking is caused by the ion heat conduction and the collisional presheath and its sharpness increases for higher density. Also solutions for different impurity density profiles were obtained and reduction of the electron energy flux and temperature were observed. However, their effects were small and qualitative changes were not observed." @default.
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- W3023021665 date "2009-09-01" @default.
- W3023021665 modified "2023-09-27" @default.
- W3023021665 title "1D fluid model of plasma profiles in the LHD divertor leg" @default.
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