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

doi:10.1016/0041-624X(96)00022-4

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

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

1 Citation (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	307-309
Number of pages	3
Journal	Ultrasonics
Volume	34
Issue number	2-5
DOIs	https://doi.org/10.1016/0041-624X(96)00022-4
Publication status	Published - Jun 1996
Externally published	Yes

All Science Journal Classification (ASJC) codes

Acoustics and Ultrasonics

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10.1016/0041-624X(96)00022-4

Cite this

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title = "How to recognize superconducting rotor sound by AE",

abstract = "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.",

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

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language = "English",

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TY - JOUR

T1 - How to recognize superconducting rotor sound by AE

AU - Nomura, H.

AU - Kaiho, K.

AU - Ishii, I.

AU - Higuchi, N.

AU - Tateishi, H.

AU - Fuchino, S.

AU - Kajikawa, K.

AU - Sekine, S.

AU - Arai, K.

AU - Natori, N.

AU - Tamada, N.

PY - 1996/6

Y1 - 1996/6

N2 - 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.

AB - 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.

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JO - Ultrasonics

JF - Ultrasonics

SN - 0041-624X

IS - 2-5

ER -

How to recognize superconducting rotor sound by AE

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