交变磁场下超导薄圆筒的交流损耗研究

摘要

Numerical simulations on the AC loss characteristics in a thin superconducting tube were presented in this paper. Geometry of the superconductor was modeled as a tube with negligible thickness, and assumed to carry a transport current and simultaneously exposed to AC external magnetic field, which had same phase with the AC transport current. Based on Bean critical model, AC loss was obtained by means of numerical method. The results were in good agreement with experiments. This numerical simulation method was only suitable for a thin HTS tube, which was perhaps applicable in a thin tube configuration consisted of coated superconductors.%通过数值模拟方法研究了超导薄圆筒在交变磁场下的交流损耗特性.这种超导体的几何模型为一个通有与外加磁场同相位的交流电且厚度可忽略的圆筒.基于Bean临界态模型,通过数值方法得到了交流损耗Q,与实验结果符合得很好.此值模拟方法仅适用于超导薄圆筒,对涂层超导体具有一定的应用价值.