Development and testing of one-turn resistive structures of aluminium alloy vacuum vessel for reacting plasma experiment

R-tokamak is a low radioactive D-T experimental device now in the planning stage. The vacuum vessel has a D-shaped thick shell make of aluminium alloy. The development of toroidal one-turn resistive structures of the aluminium alloy vessel is one of the crucial design subjects for R-tokamak. There exist two possible ways to obtain toroidal one-turn resistive structures, i.e. insulating seal joints and bellows. The results of the development and testing of these two types of one-turn resistive structures are described. (author)