First results of biasing experiments on the T-10 tokamak

The first results of the electrode biasing experiments performed on the T-1 0 tokamak are presented. Positive voltage applied to an electrode inserted inside the tokamak limiter results in the H-mode transition characterised b y a decrease of D-alpha emission intensity, a rise of line-average plasma d ensity and an increase in energy lifetime. Growth of core electron and ion temperatures during the electrode biasing implies the formation of the ther mal barrier in addition to the particle transport barrier.