An Apparatus for Evaluating Strain Effect of Critical Current in Superconducting Wires in Magnetic Fields up to 16.5 T
An Apparatus for Evaluating Strain Effect of Critical Current in Superconducting Wires in Magnetic Fields up to 16.5 T
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评估 16.5 T 磁场中超导线材临界电流应变效应的装置
DOI：
10.1007/978-1-4613-9880-6_9
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发表时间：
1990
期刊：
影响因子：
2.1
通讯作者：
K. Watanabe
中科院分区：
文献类型：
--
作者：
K. Katagiri;M. Fukumoto;K. Saito;M. Ohgami;T. Okada;A. Nagata;K. Noto;K. Watanabe
研制了一套实用超导线材临界电流Ic应变效应的测量装置。该装置安装在东北大学超导材料高场实验室的16.5T超导磁体中。样品的总长度为44 mm。它的每一端都焊接到一个铜把手上，该把手也用作电流端子。通过移动杠杆臂来施加载荷。应变通过在活动夹持器和固定夹持器之间设置的引伸计来测量。精度为0.05%应变。该装置的负载和电流容量分别为500 N和200 A。通过与常规装置的结果进行比较，证实了良好的操作。与NIST在VAMAS国际循环试验样品中获得的数据的合理一致性证明了该装置的可靠性。使用该装置，评估由液体渗透法制造的线材的应变特性。
An apparatus to evaluate the strain effect of critical current, Ic, in practical superconducting wires was fabricated. The apparatus was installed in the 16.5 T superconducting magnet of High Field Laboratory for Superconducting Materials, Tohoku University. Total length of a specimen is 44 mm. Each end of it is soldered to a copper grip which also serves as a current terminal. The load is applied by moving the lever arm. The strain is measured by use of a extensometer set between the movable grip and the fixed one. The accuracy is 0.05 % strain. The voltage taps are soldered at a distance of 10 mm. The capacities in load and current of the apparatus are 500 N and 200 A, respectively. A good operation is confirmed by comparing results with those in the conventional apparatus. Reasonable agreement with the data obtained at NIST in VAMAS international round robin test samples gave a proof for reliability on the apparatus. Using this apparatus, strain characteristics of a wire fabricated by liquid infiltration method is evaluated.