Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9793876 | Journal of Nuclear Materials | 2005 | 5 Pages |
Abstract
The two-dimensional, multi-ion, fluid code UEDGE is used to simulate the sophisticated transport of impurities in the tokamak edge plasma. The UEDGE model incorporates the effects of non-diffusive intermittent cross-field transport by using anomalous convective velocities whose spatial profile is adjusted for each ion charge state to match available experimental data. The simulations of low-confinement (L-mode) shots indicate that: (i) anomalous convective transport dominates in the far scrape-off layer; (ii) different impurity charge states have different magnitudes and signs in their convective velocities; and (iii) chamber wall sputtering is an important source of impurities.
Keywords
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Physical Sciences and Engineering
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Nuclear Energy and Engineering
Authors
A.Yu. Pigarov, E.M. Hollmann, S.I. Krasheninnikov, T.D. Rognlien, W.P. West,