A Test System for Superconducting Joints Based on GM Cryocooler

被引：3

作者：

Ni, Dongsheng ^{[1
,2
]}

Yang, Wenjie ^{[1
]}

Han, Shaofei ^{[1
]}

Zhu, Li ^{[1
]}

Zhang, Xiang ^{[1
]}

Wu, Beimin ^{[1
]}

Ma, Lizhen ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[2] Univ Sci & Technol China, Grad Sch, Hefei 230026, Peoples R China

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2014年 / 24卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Critical current; cryocooler; Penning trap; resistance; superconducting joint; test; WIRES;

D O I：

10.1109/TASC.2013.2285785

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A helium-free superconducting joints test system based on a 1.5 W GM cryocooler has been built in the Institute of Modern Physics, CAS. The resistance and the critical-current of a joint at a particular magnetic field and a particular temperature can be measured synchronously. This system consists of a device on the second stage of the cryocooler and an instrumentation system. The basic method of this system is inductive technique and the current-decay method. The main components of the device include a drive coil, a sample holder, and a background magnet. The measurement process is operating by a LabView program. It has been used to test the NbTi wire joints of the Lanzhou penning trap magnet; it seems reliable and convenient. The principles of main design and some results are presented in this paper.

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