Helium Ash Exhaust with Single-Null Poloidal Divertor in Doublet III
Abstract
The helium ash exhaust function of a divertor has been experimentally demonstrated. Helium atoms accumulate in the divertor region as the electron density of the main plasma increases. With a helium concentration of ~ 1.6% of electron density in the main plasma, neutral helium pressure at the divertor region is as high as 1.0×10-4 Torr. This experiment indicates the possibility of helium ash exhaust in an α-particle-heated diverted tokamak with use of pumping ducts of a practical size.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 1981
- DOI:
- 10.1103/PhysRevLett.47.796
- Bibcode:
- 1981PhRvL..47..796S
- Keywords:
-
- 52.55.Gb