Electrical Performance of the Insulation Mock-Ups for the Bi-2212 Cable-in-Conduit Conductor

A Bi-2212 cable-in-conduit conductor is manufactured by winding, heat treating, and insulating the superconducting conductors. To verify the performance of alumina-silicate fiber used as insulating fiber in the Bi-2212 cable-in-conduit conductor, mock-ups of 5 × 5 array with alumina-silicate fiber and glass fiber were manufactured. They have undergone ac and dc tests at room temperature, Paschen test, thermal cycling, and electrical breakdown test. The results indicate that the mock-ups with the alumina-silicate fiber tape have similar performance with the mock-up of the glass fiber tape. The performance of the mock-ups confirms the feasibility of using alumina-silicate fiber tapes for the Bi-2212 cable-in-conduit conductor that are made by wind and react, laying the foundation for their subsequent applications.