MODELLING OF THE BOUNDARY PLASMA OF LARGE TOKAMAKS
Fluid models developed at Culham for the boundary plasma of tokamaks are surveyed and their application to devices such as INTOR or NET is described. The simplest model is based upon transport of a single fluid and considers parallel conduction along the scrape-off layer with a convective sheath boundary condition: its versatility is demonstrated in a comparison of the INTOR divertor and limiter. A two-fluid, one dimensional model has been critically compared with the simple model; it has also been used in a study of impurity transport, and predictions for a highly recycling plasma are described. A two-fluid two-dimensional model of the plasma is presented: it has provided predictions for the thermal load on the INTOR divertor plate. We conclude by showing the need for a careful physical description of a two- dimensional plasma boundary.
Bibliographic Reference: JOURNAL OF NUCLEAR MATERIALS, VOL. 121 (1984), PP. 75-81
Record Number: 1989123051400 / Last updated on: 1987-01-01
Available languages: en