An Analysis of AC loss of Bi-2212 CICC

With the development of magnetic confinement fusion research, more and more stronger magnetic fields are needed. Commonly used superconductor of Nb3Sn in high-field magnets which does not have much potential for improvement. We need to develop conductor with new superconducting materials. Bi2Sr2CaCu2Ox is such a promising material. One sub-size conductor with 42 wires was designed and manufactured at ASIPP and its AC loss has been tested in the standard magnetization magnet for transverse magnetic fields at the University of Twente. The phenomenological model was used to analyze the test results. The results show that the coupling loss of Bi2212 conductor is larger than that of Nb3Sn conductor under the same condition. This may due to the fact that the Bi2212 strands use the silver matrix which resistance is less than that of the Nb3Sn strand’s copper matrix.