Impurity screening in high density plasmas in tokamaks with a limiter configuration is investigated by means of a simple semi-analytical model. An iterative scheme is devised, in order to determine self-consistently the values of scrape-off layer thickness, edge electron density and temperature, and main plasma contamination parameter Zeff, as a function of given average electron density and temperature in the main plasma and given input power. The model is applied to the poloidal limiter case of the Frascati Tokamak Upgrade, and results are compared with experimental data. A reasonable agreement between the trends is found, emphasizing the importance of a high edge plasma density for obtaining a clean main plasma in limiter tokamaks. © 1992 Elsevier Science Publishers B.V. All rights reserved.
All Science Journal Classification (ASJC) codes
- Nuclear Energy and Engineering
- Materials Science(all)
- Nuclear and High Energy Physics
- Electronic, Optical and Magnetic Materials
Ferro, C., & Zanino, R. (1992). Impurity screening in high density plasmas in tokamaks with a limiter configuration. Journal of Nuclear Materials, 196-198(C), 321 - 325. https://doi.org/10.1016/S0022-3115(06)80054-1