Overview of radiative improved mode results on TEXTOR-94

The radiative improved (RI) mode is a tokamak regime offering many attracti ve reactor features. In the article, the RI mode of TEXTOR-94 is shown to f ollow the same scaling as the linear ohmic confinement regime and is thus i dentified as one of the most fundamental tokamak operational regimes. The c urrent understanding derived from experiments and modelling of the conditio ns necessary for sustaining the mode is reviewed, as are the mechanisms lea ding to L-RI mode transition. The article discusses the compatibility of hi gh impurity seeding with the low central power density of a burning reactor , as well as RI mode properties at and beyond the Greenwald density.