Blocks-in-Conduit: REBCO Cable for a 20T@20K Toroid for Compact Fusion Tokamaks

Blocks-in-Conduit is a novel approach to cable, coil, and splice technologies with unique benefits for high-current-density toroid winding operate at 20 T K. Blocks of REBCO tape are cabled in conduit, laminated structure thin-wall center-tube that provides twist along the spring-loaded stress management within cross-flow cooling throughout thick winding. The coil technology utilizes co-wound armor integrates management, bypass protect BIC. An interleaved joint enables low-resistance demountable splices pack. These provisions yield maximum current density pack, stability blocks, minimum conductor cost tokamak toroid.