Present status of fusion researches in USA, (1). Status of fusion program at Oak Ridge National Laboratory

The nuclear fusion research in Oak Ridge National Laboratory has made important contribution in the synthetic research combining the theory, experiment, technical development and research program and the coordination of the participation of private enterprises. The ORMAK is one of the tokamaks with which neutral beam injection heating was attempted. The impurity study experiment setup A was used for the research of the containment of plasma by resistance heating only and of the treatment of impurities since 1977, and modified to the ISX-B with 1.8 MW NBI for the purpose of the research on high beta plasma in 1978. At present, the Advanced Toroidal Facility 1 is designed on the basis of stellarator system. It is intended to find the method of optimum transport characteristics in the steady operation and high beta by toroidal field containment. The research on the containment of Elmo bumpy torus type, the development of neutral beam injection, pellet supply and burning system and superconducting magnets, and the research on the design of nuclear fusion reactors are reported. (Kako, I.)