Plasma performance and plasma-wall interaction in TEXTOR

The performance of the TEXTOR tokamak, as manifested by its density limit, confinement time, behaviour of density and current density profiles, and impurity level, is described. By means of ICRH heating, powers significantly above the Ohmic one are obtained. The deposition of thin carbon layers onto all inner surfaces is shown to be an effective method for achieving low impurity concentrations in the plasma. Results of a systematic study of plasma-wall interaction, with particular emphasis on a quantitative description of the particle sources and of the boundary layer, are presented. Pump limiter experiments resulting in high particle removal rates are described. (author)