Abstract
Studies on plasma confinement, steady-state tokamak operations and boundary plasmas are main subjects in tokamaks relating to fusion plasmas. Emphases of recent JT-60 experiments from 1987 to the shutdown in October, 1989 were put on these studies. Investigations of L-mode improved modes such as pellet injection, high Ti mode, giant sawtooth by 3rd harmonics of ICRF etc., and H-mode were carried out as confinement studies. Current drive by LHCD made a large progress by using a new launcher. Bootstrap current reached 80% of plasma current, which has brought a new idea of steady-state tokamaks. Results on particle confinement, particle and heat control studies with divertor are also presented
