A detailed study of the design, construction and cryo-operation of an HTS magnet

IF 1.7 3区物理与天体物理 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Applied Superconductivity Pub Date : 2002-03-01 DOI:10.1109/TASC.2002.1018744

P.E. Richens;H. Jones

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引用次数: 16

Abstract

The design, construction, and characterization of a high temperature superconducting (HTS) magnet is described. The design stage has involved the development of computer software for the calculation of the critical current of a solenoid wound from anisotropic HTS conductor. This calculation can be performed for a variety of problems including those involving magnetic materials such as iron by the incorporation of finite element electromagnetic analysis software. This has enabled the optimization of the magnet's performance. The HTS magnet is wound from 190 m of silver-matrix Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/ powder-in-tube tape conductor. The dimensions are 70 mm bore and 70 mm length, and it consists of 728 turns. Iron end-plates were utilized in order to reduce the radial magnetic field, and consequently increase the performance by /spl sim/20%. The magnet has been operated in liquid cryogens and has achieved engineering current densities of 900 A cm/sup -2/ at 77 K and 6680 A cm/sup -2/ at 4.2.K. The HTS magnet has been operated by conduction-cooling on a mechanical refrigerator at various temperatures in the range 12 to 50 K. The thermal stability in this relatively low cooling-power system has been assessed. An engineering current density of 5600 A cm/sup -2/ was achieved at 12 K.

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高温超导磁体的设计、结构和低温操作的详细研究

介绍了高温超导磁体的设计、结构和特性。设计阶段涉及计算机软件的开发，用于计算由各向异性HTS导体缠绕的螺线管的临界电流。通过结合有限元电磁分析软件，可以对包括涉及诸如铁的磁性材料的问题在内的各种问题执行该计算。这使得磁体的性能得以优化。HTS磁体由190m的银基质Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/粉末缠绕在管带导体中。尺寸为70mm孔径和70mm长度，由728圈组成。采用铁端板以减少径向磁场，从而将性能提高/spl-sim/20%。该磁体已在液体冷冻剂中运行，并在77K和4.2K下分别获得了900A cm-2/和6680 A cm-2/的工程电流密度。HTS磁体已在12至50K的各种温度下通过机械制冷机上的传导冷却运行。已经评估了这种相对低冷却功率系统中的热稳定性。在12K下获得了5600安培/平方米的工程电流密度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Applied Superconductivity 工程技术-工程：电子与电气

CiteScore

3.50

自引率

33.30%

发文量

650

审稿时长

2.3 months

期刊介绍： IEEE Transactions on Applied Superconductivity (TAS) contains articles on the applications of superconductivity and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Large scale applications include magnets for power applications such as motors and generators, for magnetic resonance, for accelerators, and cable applications such as power transmission.