Present status of fusion researches in USA, (2). Present status of fusion researches at Lawrence Livermore National Laboratory

At present, efforts are concentrated on the research and development of the device based on the tandem mirror principle in the Lawrence Livermore National Laboratory. The demonstration of the principle of tandem mirror containment with the TMX and the advent of the new concept of thermal barrier made the prospect of the practical use of nuclear fusion reactors based on the magnetic mirrors bright. At present, the experiment of forming thermal barrier by electron cyclotron resonance heating is in progress at the TMX-Upgrade device. The research has been continued aiming at the realization of a test reactor with zero electric output with the fusion power demonstration facility through the confirmation of the proportionality law and the attainment of the physically critical condition with the mirror fusion test facility B. The history of magnetic mirror experiment, the present status of the tandem mirror experiment, the future plan, and the development of superconducting magnetic coils, fast neutral beam sources, gyrotrons and others are described. (Kako, I.)