Study on suppression of decay of trapped magnetic field in HTS bulk subject to AC magnetic field

Y. Zushi; I. Asaba; J. Ogawa; K. Yamagishi; O. Tsukamoto; M. Murakami; M. Tomita

doi:10.1016/j.physc.2004.01.094

Study on suppression of decay of trapped magnetic field in HTS bulk subject to AC magnetic field

Y. Zushi, I. Asaba, J. Ogawa, K. Yamagishi, O. Tsukamoto, M. Murakami, M. Tomita

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

The trapped magnetic field in a bulk is decayed and even erased by the application of the AC external magnetic field whose amplitude is much smaller than the trapped magnetic field. In the previous work, an experimental result showed that the decay of the trapped magnetic field was due to temperature rise of the bulk caused by the AC losses. Based on this result, it is considered that the decay can be suppressed by (a) improvement of the cooling of the bulk and (b) reduction of the AC losses. We verified the effectiveness of these methods by conducting an experiment using a recently developed metal impregnated bulk which has high critical current density and improved thermal conductivity.

Original language	English
Pages (from-to)	708-713
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	412-414
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2004.01.094
Publication status	Published - 2004 Oct 1
Externally published	Yes

Keywords

AC losses
Bulk temperature
HTS bult
Trapped magnetic field

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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AU - Zushi, Y.

AU - Asaba, I.

AU - Ogawa, J.

AU - Yamagishi, K.

AU - Tsukamoto, O.

AU - Murakami, M.

AU - Tomita, M.

PY - 2004/10/1

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N2 - The trapped magnetic field in a bulk is decayed and even erased by the application of the AC external magnetic field whose amplitude is much smaller than the trapped magnetic field. In the previous work, an experimental result showed that the decay of the trapped magnetic field was due to temperature rise of the bulk caused by the AC losses. Based on this result, it is considered that the decay can be suppressed by (a) improvement of the cooling of the bulk and (b) reduction of the AC losses. We verified the effectiveness of these methods by conducting an experiment using a recently developed metal impregnated bulk which has high critical current density and improved thermal conductivity.

AB - The trapped magnetic field in a bulk is decayed and even erased by the application of the AC external magnetic field whose amplitude is much smaller than the trapped magnetic field. In the previous work, an experimental result showed that the decay of the trapped magnetic field was due to temperature rise of the bulk caused by the AC losses. Based on this result, it is considered that the decay can be suppressed by (a) improvement of the cooling of the bulk and (b) reduction of the AC losses. We verified the effectiveness of these methods by conducting an experiment using a recently developed metal impregnated bulk which has high critical current density and improved thermal conductivity.

KW - AC losses

KW - Bulk temperature

KW - HTS bult

KW - Trapped magnetic field

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