论文标题
建模超导堆栈和散装的跨场消除磁场，以使用多达100个磁带和200万个周期
Modeling cross-field demagnetization of superconducting stacks and bulks for up to 100 tapes and 2 million cycles
论文作者
论文摘要
超导堆栈和散装可以充当非常强的磁铁（超过17吨），但由于动态磁耐药性，它们在交替（或波纹）横向磁场的存在下失去了磁化。这种消除电磁是需要高运行时间的应用，例如电动机和发电机，在波纹场中具有较高的幅度和频率。我们已经开发了一个基于动态磁性耐药性的数值模型，该模型比常规的幂律抗性模型快得多，使我们能够以相同的精度模拟大量的周期。我们模拟了由10-100个磁带制成的超导堆栈的反导行为，最多可用于200万个施加的纹波场。我们发现，对于大量的周期，捕获的场都达到超导体和堆栈的非零固定值。只要纹波场幅度幅度在平行渗透场以下，就可以由堆栈中的单个胶带的穿透场确定。与堆栈相比，散装保持更高的波纹场幅度的大量固定值，与大量周期有关。但是，对于较少的循环，与大容量相比，堆栈损失的磁化幅度要少得多。
Superconducting stacks and bulks can act as very strong magnets (more than 17 T), but they lose their magnetization in the presence of alternating (or ripple) transverse magnetic fields, due to the dynamic magneto-resistance. This demagnetization is a major concern for applications requiring high run times, such as motors and generators, where ripple fields are of high amplitude and frequency. We have developed a numerical model based on dynamic magneto-resistance that is much faster than the conventional Power-Law-resistivity model, enabling us to simulate high number of cycles with the same accuracy. We simulate demagnetization behavior of superconducting stacks made of 10-100 tapes for up to 2 million cycles of applied ripple field. We found that for high number of cycles, the trapped field reaches non-zero stationary values for both superconducting bulks and stacks; as long as the ripple field amplitudes are below the parallel penetration field, being determined by the penetration field for a single tape in stacks. Bulks keep substantial stationary values for much higher ripple field amplitudes than the stacks, being relevant for high number of cycles. However, for low number of cycles, stacks lose much less magnetization as compared to bulks.
