Physics – Plasma Physics
Scientific paper
1995-07-11
Physics
Plasma Physics
Preprint for the 11th International Conference on Plasma Surface Interactions in Mito, Japan (1994), uuencoded and gzipped pos
Scientific paper
10.1016/0022-3115(94)00465-X
To characterize the conditions required to reach advanced divertor regimes, a one-dimensional computational model has been developed based on a coordinate transformation to incorporate two-dimensional effects. This model includes transport of ions, two species each of atoms and molecules, momentum, and ion and electron energy both within and across the flux surfaces. Impurity radiation is calculated using a coronal equilibrium model which includes the effects of charge-exchange recombination. Numerical results indicate that impurity radiation acts to facilitate plasma detachment and enhances the power lost from the divertor channel in escaping neutral atoms by cooling the electrons and suppressing ionization. As divertor particle densities increase, cold and thermal molecules become increasingly important in cooling the plasma, with molecular densities dominating electron and atomic densities under some conditions.
Bateman Glenn
Post Douglass E.
Vesey R. A.
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