Superconducting cable cross-section (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Each wire in the cable contains niobium and tin, separated by copper. When heat-treated, the superconducting niobium-tin is formed. Credit Berkeley Lab Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.