Relaxation of trapped magnetic field in a Bi-2212/Ag solenoidal coil with persistent current switch

被引：11

作者：

Okada, M ^{[1
]}

Fukushima, K ^{[1
]}

Tanaka, K ^{[1
]}

Kumakura, H ^{[1
]}

Togano, K ^{[1
]}

Kiyoshi, T ^{[1
]}

Inoue, K ^{[1
]}

机构：

[1] NATL RES INST MET,TSUKUBA,IBARAKI 305,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1996年 / 35卷 / 5B期

关键词：

persistent current switch; Bi2Sr2Ca1Cu2Ox; multifilamentary tape; solenoidal coil; oxide superconductor; flux creep;

D O I：

10.1143/JJAP.35.L627

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We succeeded in the persistent current mode operation of a small Bi2Sr2Ca1Cu2Ox (Bi-2212) solenoidal coil with persistent current switch (PCS). The coil and the PCS were fabricated using silver sheathed Bi-2212 multifilamentary tape. We confirmed the ability to trap a 1000 G magnetic Geld with a persistent current of 30 A. From the relaxation of persistent current up to 50 h, a relaxation time was estimated to be tau > 800 ks, showing a resistance in overall current loop below 0.2 n Omega. The average rate of magnetic relaxation was 0.4%/h with a inductance L of 0.2 mH. The relaxation was able to explain by means of the thermally assisted flux creep model. The pinning potential U-0 was estimated from the relaxation curve to be 6 meV.

引用

页码：L627 / L629

页数：3

共 7 条

[1] FLUX CREEP IN TYPE-2 SUPERCONDUCTORS [J].