YBCO and Bi2223 Coils for High Field LTS/HTS NMR Magnets: HTS-HTS Joint Resistivity

被引：51

作者：

Kim, Youngjae ^{[1
]}

Bascunan, Juan ^{[1
]}

Lecrevisse, Thibault ^{[1
]}

Hahn, Seungyong ^{[1
]}

Voccio, John ^{[1
]}

Park, Dong Keun ^{[1
]}

Iwasa, Yukikazu ^{[1
]}

机构：

[1] MIT, Francis Bitter Magnet Lab, Cambridge, MA 02139 USA

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2013年 / 23卷 / 03期

基金：

美国国家卫生研究院;

关键词：

Coated YBCO conductor and Bi2223; high-temperature superconducting (HTS) magnet; HTS tape to HTS tape splicing technique; HTS-HTS splice resistivity;

D O I：

10.1109/TASC.2013.2243195

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：

This paper presents our latest experimental results on high-temperature superconducting (HTS) splice joints for HTS insert coils made of YBCO and Bi2223, that comprise a 1.3 GHz low-temperature superconducting/HTS nuclear magnetic resonance magnet currently under development at Francis Bitter Magnet Laboratory. HTS splice joint resistivity at 77 K in these insert coils must be reproducible and < 100 n Omega . cm(2). Several YBCO tape to YBCO tape (YBCO-YBCO) splice joint samples were fabricated, and their resistivity and I-c were measured at 77 K. First, we describe the joint splicing setup and discuss the parameters that affect joint resistivity: pressure over joint surface, solder, and YBCO spool batch. Second, we report results on YBCO-YBCO joints at 77 K in zero field. Measurements have shown that spool batch and solder are primary sources of a wide range of variation in YBCO-YBCO joint resistivity. By controlling these parameters, we expect to reproducibly achieve HTS-HTS resistive joints of resistance < 100 n Omega . cm(2).

引用

页数：4