AC Loss Property of Stacked REBCO Superconducting Multifilamentary Tapes under Perpendicular Magnetic Field

AC Loss Property of Stacked REBCO Superconducting Multifilamentary Tapes under Perpendicular Magnetic Field
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垂直磁场下堆叠式REBCO超导复丝带材的交流损耗特性

DOI:
10.1088/1742-6596/1054/1/012037
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发表时间:
2018
期刊:
Journal of Physics: Conference Series
影响因子:
--
通讯作者:
Ibi A
Ibi A
中科院分区:
--
文献类型:
--
作者:
Sasa H;Ito T;Iwakuma M;Miura S;Izumi T;Machi T;Ibi A

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对于高温超导体的交流应用,例如REBa2Cu3Oy(REBCO,RE=稀土)超导带材,交流损耗是冷却系统总热负荷的很大一部分。在传导冷却的情况下,它可能会导致超导系统的严重温升。因此,降低超导绕组中的交流损耗,掌握其在各种条件下的性能是非常重要的。为了减少交流损耗,REBCO带应该通过激光划片技术被划片成多层结构。在这项研究中,交流损耗特性的非划线和划线磁带进行了研究,特别是B m< B p,其中B p是交流损耗曲线的转折点,对应于穿透磁场的磁通穿透到磁带或灯丝的中心。此外,从退磁效应的角度研究了B p对堆叠带和细丝的数量的依赖性。结果表明,随着叠层带数的增加,B m< B p的交流损耗减小,而B p增大。
For AC applications of high-temperature superconductors, such as REBa 2 Cu 3 O y (REBCO, RE= rare earth) superconducting tapes, an AC loss is a great part of total heat load of cooling systems. In the case of conduction cooling, it may cause a serious temperature rise of the superconducting systems. Therefore, it is very important to reduce the AC loss in superconducting windings and grasp its properties under various conditions. For AC loss reduction, REBCO tapes should be scribed into a multifilamentary structure by the laser-scribing technique. In this study, AC loss properties in the non-scribed and scribed tapes were investigated, especially for B m< B p, where B p is the breaking point of the AC loss curve and corresponds to the penetration field where the magnetic flux penetrates to the center of the tape or filaments. Further, the dependences of B p on the number of stacking tapes and filaments were investigated from the viewpoint of demagnetization effect. It was cleared that the AC loss for B m< B p decrease and B p increase with increasing number of stacked tapes.
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