T. Melišek, D. Berek, M. Búran, M. Bennar, P. Kováč
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引用次数: 0
摘要
开发可靠的连接技术对于未来的应用超导，特别是对于在持续模式下工作的超导磁体，具有重要意义。我们制造并测试了单芯未反应原位 MgB2/Fe 线之间具有终端结构的超导接头。在 4.2 K 和 20 K 条件下，对接头的 I-V 特性进行了测量，并与连接导线的 I-V 特性进行了比较。对接头临界电流与母导体临界电流之比（Ic-接头/Ic-导线）进行了评估和讨论。结果发现，在高外电场下，具有终端结构的 Ic-接头可能比 Ic-导线还要大，但在低电场下则会减小。在 20 K 和 1.5 T 的低外场条件下，测得最佳接头的 Ic-joint/Ic-wire = 0.8，这对功能性持久开关很有希望。
Joining of single-core ex-situ MgB2/Fe wires by termination architecture
The development of reliable jointing technique is of great importance for the future of applied superconductivity, especially for superconducting magnets working in persistent mode. Superconducting joints with termination architecture between single-core not reacted ex-situ MgB2/Fe wires were manufactured and tested. I-V characteristics of joints were measured at 4.2 K and 20 K for variable external fields and compared with I-V of joined wire. The ratio of joints critical current to that of parent conductors (Ic-joint/Ic-wire) has been evaluated and discussed. It was found that Ic-joint with termination architecture may be even larger than Ic-wire at high external field, but decreasing for lower fields. Ic-joint/Ic-wire = 0.8 was measured for the best joint at 20 K and low external field 1.5 T, which is promising for functional persistent switch.
期刊介绍：
Cryogenics is the world''s leading journal focusing on all aspects of cryoengineering and cryogenics. Papers published in Cryogenics cover a wide variety of subjects in low temperature engineering and research. Among the areas covered are:
- Applications of superconductivity: magnets, electronics, devices
- Superconductors and their properties
- Properties of materials: metals, alloys, composites, polymers, insulations
- New applications of cryogenic technology to processes, devices, machinery
- Refrigeration and liquefaction technology
- Thermodynamics
- Fluid properties and fluid mechanics
- Heat transfer
- Thermometry and measurement science
- Cryogenics in medicine
- Cryoelectronics
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