High-temperature superconducting undulator magnets
High-temperature superconducting undulator magnets
复制标题
高温超导波荡器磁体
DOI：
10.1088/1361-6668/aa5d48
复制
发表时间：
2017
影响因子：
3.6
通讯作者：
U. Welp
中科院分区：
文献类型：
--
作者：
I. Kesgin;M. Kasa;Y. Ivanyushenkov;U. Welp
本文给出了用15%掺锆氧化钡铜氧化物高温超导带材制作的超导波荡器磁体样机的测试结果。在11极磁体上，我们证明了在4.2K时，工程电流密度Je超过2.1kA mm−2，这一值比用NbTi线缠绕的可比器件高40%，NbTi线目前用于所有运行的超导波荡器。一种新的缠绕方案能够将带状导体连续缠绕到复杂的波动磁体中，以及部分层间绝缘程序是实现这一性能进步的关键。目前，高温超导的性能有了快速的进步；因此，在波荡器结构中获得更高的电流密度或/和在高于4.2K的温度下运行将是可能的，这将大大简化低温设计并降低总体成本。
This paper presents test results on a prototype superconducting undulator magnet fabricated using 15% Zr-doped rare-earth barium copper oxide high temperature superconducting (HTS) tapes. On an 11-pole magnet we demonstrate an engineering current density, Je, of more than 2.1 kA mm−2 at 4.2 K, a value that is 40% higher than reached in comparable devices wound with NbTi-wire, which is used in all currently operating superconducting undulators. A novel winding scheme enabling the continuous winding of tape-shaped conductors into the intricate undulator magnets as well as a partial interlayer insulation procedure were essential in reaching this advance in performance. Currently, there are rapid advances in the performance of HTS; therefore, achieving even higher current densities in an undulator structure or/and operating it at temperatures higher than 4.2 K will be possible, which would substantially simplify the cryogenic design and reduce overall costs.