Suppression of Influence of AC External Magnetic Field on Trapped Magnetic Flux in the HTS Bulk by Use of HTS Shielding Rings

被引：6

作者：

Yamagishi, Kazuhito ^{[1
]}

Tsukamoto, Osami ^{[1
]}

Ogawa, Jun ^{[2
]}

机构：

[1] Yokohama Natl Univ, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan

[2] Niigata Univ, Niigata 9502181, Japan

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2009年 / 19卷 / 03期

关键词：

AC losses; HTS bulk; reduction of AC losses; shielding; trapped magnetic field; YBCO BULK; SYSTEM;

D O I：

10.1109/TASC.2009.2019015

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：

Trapped magnetic fields in high temperature superconductor (HTS) bulks are decayed when the bulks are subjected to perturbation of magnetic fields. This phenomenon is inconvenient for the applications of HTS bulks and it is necessary to develop methods to suppress the decay. It was found in a previous study that the decay is caused by temperature rises of the bulks due to AC losses in the bulks. Therefore, it is necessary to develop a method to reduce the AC losses. In this work, a method is proposed to reduce the AC losses by putting HTS shield rings around the bulk and shielding performance of the rings were investigated. The experimental result shows that the shielding rings can drastically suppress the decay, even if the bulk is used in the same cooling condition and the effectiveness of the method was demonstrated.

引用

页码：3561 / 3564

页数：4

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