High Field Magnets With HTS Conductors
High Field Magnets With HTS Conductors
复制标题
DOI：
10.1109/tasc.2010.2043080
复制
发表时间：
2010-03
影响因子：
1.8
通讯作者：
H. Weijers;U. Trociewitz;W. Markiewicz;J. Jiang;D. Myers;E. Hellstrom;A. Xu;J. Jaroszynski;P. Noyes;Y. Viouchkov;D. Larbalestier
中科院分区：
文献类型：
--
作者：
H. Weijers;U. Trociewitz;W. Markiewicz;J. Jiang;D. Myers;E. Hellstrom;A. Xu;J. Jaroszynski;P. Noyes;Y. Viouchkov;D. Larbalestier
使用高温超导体（HTS）开发高磁场磁体是NHMFL的核心活动。目前正在研究基于YBCO涂层带状导体和Bi-2212圆线的磁体技术。两个具体项目正在进行中。第一个是具有17 T YBCO线圈组的用户磁体，其在LTS外插器内将产生32 T的组合场。第二个是7 T Bi 2212演示线圈，用于在大口径电阻磁体中运行，以产生25 T的组合磁场。由于两种导体类型的技术差异很大，每个项目都面临着不同的导体和磁体技术挑战。两个小线圈已被测试在38毫米冷孔低温恒温器插入在31 T的电阻磁铁：一个Bi 2212圆线层绕插入线圈，产生1.1 T的总32.1 T和YBCO双饼插入，产生2.8 T的总中心场为33.8 T。四个较大的层绕线圈已被制造和测试在20 T，186毫米冷膛电阻磁铁：一个相当大的Bi-2212线圈和三个薄的大直径的YBCO线圈。对试验结果进行了讨论。这些线圈承受的电流密度和应力水平支持了我们的信念，即>30 T的全超导磁体是可行的。
Development of high-field magnets using high temperature superconductors (HTS) is a core activity at the NHMFL. Magnet technology based on both YBCO-coated tape conductors and Bi-2212 round wires is being pursued. Two specific projects are underway. The first is a user magnet with a 17 T YBCO coil set which, inside an LTS outsert, will generate a combined field of 32 T. The second is a 7 T Bi2212 demonstration coil set to be operated in a large bore resistive magnet to generate a combined magnetic field of 25 T. Owing to the substantial technological differences of the two conductor types, each project faces different conductor and magnet technology challenges. Two small coils have been tested in a 38-mm cold bore cryostat inserted in a 31 T resistive magnet: a Bi2212 round-wire layer-wound insert coil that generated 1.1 T for a total of 32.1 T and a YBCO double-pancake insert that generated 2.8 T for a total central field of 33.8 T. Four larger layer-wound coils have been manufactured and tested in a 20 T, 186-mm cold bore resistive magnet: a sizeable Bi-2212 coil and three thin large-diameter YBCO coils. The test results are discussed. The current densities and stress levels that these coils tolerate underpin our conviction that >30 T all-superconducting magnets are viable.