Large high field superconducting magnets often require high current superconducting cables. To develop these cables, a facility capable of providing a high magnetic field with large sampling area as well as electrical current of tens of kA is essential. A superconducting transformer (SCT) is an energy-efficient and low-cost way to provide large current to superconducting cables. Previously, we co-developed an SCT and successfully tested it to a maximum output current of 45 kA in zero magnetic field. In this work, this SCT is installed to the 12 T split solenoid magnet at the National High Magnetic Field Laboratory (NHMFL). We calibrated it by using this facility to measure the critical current of an NbTi Rutherford cable as a function of magnetic field up to 10 T, and compared the results with those available in the literature. In addition, a strand extracted from the NbTi cable was tested for critical current. The critical current of the extracted strand is scaled and compared with the critical current of the cable. The accuracy of the critical current measurement using this SCT is discussed in detail. This work concludes the commissioning of this SCT, which combined with the 12 T split magnet will provide a unique cable testing capability for future cable development for the NHMFL and its users.

大型高场超导磁体通常需要高电流超导电缆。为了开发这些电缆，必须能够提供具有大采样面积的强磁场和数十 kA 电流的设备。超导变压器 (SCT) 是一种向超导电缆提供大电流的节能且低成本的方式。此前，我们共同开发了 SCT，并成功测试了它在零磁场下的最大输出电流为 45 kA。在这项工作中，该 SCT 安装在国家强磁场实验室 (NHMFL) 的 12 T 分体式螺线管磁铁上。我们通过使用该工具测量 NbTi Rutherford 电缆的临界电流作为高达 10 T 的磁场的函数对其进行校准，并将结果与​​文献中的结果进行比较。此外，对从 NbTi 电缆中提取的股线进行临界电流测试。提取绞线的临界电流被缩放并与电缆的临界电流进行比较。详细讨论了使用该 SCT 进行临界电流测量的准确性。这项工作结束了该 SCT 的调试，它与 12 T 分裂磁铁相结合，将为 NHMFL 及其用户的未来电缆开发提供独特的电缆测试能力。