Abstract
Many studies have used cable-in-conduit conductor (CICC) coils in trying to develop an a.c. superconducting magnet. The strands in the most recent CICC magnets are coated with chromium or another metal with high electrical resistance in order to induce current redistribution among the strands and to avoid a quench caused by a current imbalance. If, however, the cable currents were well balanced, insulating the strands would be the best way to reduce a.c. losses. We propose a new CICC magnet structure featuring a current lead that balances the strand current via its resistance. Having calculated current balances, we find that strand currents are well within the present parameters for nuclear fusion experiments and superconducting magnet energy storages.
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