PLASMA CHARACTERISTICS AND GAS TRANSPORT IN THE SINGLE-NULL POLOIDAL DIVERTOR OF THE INTERNATIONAL TOKAMAK REACTOR
Plasma behavior in the scrape-off and divertor regions of the single-null configuration of the International Tokamak Reactor (INTOR) has been predicted by means of a one-dimensional model of transport through the plasma sheath at the divertor target. Electron capture during ion - surface collisions is the principal mechanism for the production of neutral gas, which recycles to the target within the divertor chamber. This recycling is analyzed using a model for neutral particle transport through a divertor plasma channel of simple geometry and uniform density that overlays the target; the exhaust of those atoms that can escape through the plasma and enter the pumped region of the chamber is assessed by means of a gas transport model that embraces the characteristics of both chamber and pumping ducts. Estimates are made of the power dissipated by atomic line radiation and by transport of fast atoms to the walls of the chamber; sputtering of both target and walls is assessed.
Bibliographic Reference: NUCLEAR TECHNOLOGY/FUSION, VOL. 3 (1983), PP. 432-456
Record Number: 1989122051600 / Last updated on: 1987-01-01
Available languages: en