How to recognize superconducting rotor sound by AE

H. Nomura, K. Kaiho, I. Ishii, N. Higuchi, H. Tateishi, S. Fuchino, K. Kajikawa, S. Sekine, K. Arai, N. Natori, N. Tamada

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

New evaluating methods for rotating superconducting magnets have been developed by observing acoustic emission (AE) from the rotating machine. First, by measuring the AE level, we can learn whether the conductor is changing from a super to a normal state or not. Secondly, we can get to the area of the magnet the normal state was propagated in by comparing the AE signals level of each channel. Thirdly, we can estimate how large a quenched magnetic energy to dissipated in the magnet by measuring the recovery of time constant of the AE signals. Fourthly, we can detect the difference between the AE just before and after the jumps of heat flux by analysing the AE spectrum. Finally, we report how we can predict from what areas the incoming natural quench of the magnet will be initiated, by monitoring the AE level of each channel.

本文言語英語
ページ(範囲)307-309
ページ数3
ジャーナルUltrasonics
34
2-5
DOI
出版ステータス出版済み - 6 1996
外部発表はい

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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