Suppression of Metallic Impurities by Electron Injection in a Tokamak
- 12 February 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 42 (7), 446-449
- https://doi.org/10.1103/PhysRevLett.42.446
Abstract
We found that the sheath potential plays a dominant role in the plasma-wall interaction in the Macrotor tokamak. An increase in the sheath potential, produced by removing electrons from the plasma, results in the enhancement of the metal influx. When the sheath potential is reduced by electron injection, the metal influx is suppressed. This mechanism may be used as a tool in controlling metallic impurities in tokamaks.Keywords
This publication has 3 references indexed in Scilit:
- Plasma Edge Cooling during rf HeatingPhysical Review Letters, 1978
- Trapping and removal of oxygen in tokamaksNuclear Fusion, 1977
- Control of re-cycling and impurities in the ATC tokamak by means of gettered surfacesNuclear Fusion, 1975