The effect of electric field in the divertor scrape-off layer
Abstract
The effect of the radial electric field on the particle orbits in the scrape-off layer in a tokamak with an axisymmetric poloidal divertor is investigated. It is assumed that the ions are hot and collisionless and that the electrons are cold and collisional. A wider range of the ratio of electron temperature to ion temperature, i.e., from .1 to .6 has been considered. The ion density, electrostatic potential and electric field in the scrape-off layer are obtained. Plasma diffusion across the separatrix and the particle flow to the collector plates through the drift kinetic equation are considered. The effect of the electric field is seen to be predominant in the boundary layer. The particle and energy fluxes to the collector plates in presence of the radial electric field have been calculated.
- Publication:
-
International Symposium on Plasma Wall Interaction
- Pub Date:
- 1977
- Bibcode:
- 1977pwi..symp..137S
- Keywords:
-
- Boundary Layer Plasmas;
- Diverters;
- Electric Fields;
- Plasma Control;
- Plasma Diffusion;
- Tokamak Devices;
- Cold Plasmas;
- Collisional Plasmas;
- Collisionless Plasmas;
- Electron Energy;
- Energy Technology;
- Ion Temperature;
- Plasma Physics