High-Tc SQUID magnetometers and gradiometers for NDE application

J. T. Jeng; H. E. Horng; H. C. Yang

doi:10.1016/S0921-4534(01)01148-0

High-T_c SQUID magnetometers and gradiometers for NDE application

J. T. Jeng, H. E. Horng, H. C. Yang^*

^*Corresponding author for this work

Undergraduate Program of Electro-Optical Engineering

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

10 Citations (Scopus)

Abstract

The performance of the superconducting quantum interference device (SQUID) nondestructive evaluation (NDE) system with a shielded magnetometer and unshielded gradiometers were investigated. In the magnetometer NDE system, the environmental noise was reduced with the SQUID seating inside a μ-metal cylinder, whereas the environmental noise was eliminated with electronic subtraction in the gradiometer NDE system. For the shielded magnetometer NDE system, the signal-to-noise ratio was improved with a higher excitation field to enhance the defect signal. For the gradiometer NDE system, the signal-to-noise ratio was improved as a result of the reduction of environmental noise. The performance of two SQUID NDE systems is compared and the results are discussed.

Original language	English
Pages (from-to)	105-108
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	368
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4534(01)01148-0
Publication status	Published - 2002 Mar 1

Keywords

Gradiometer
Magnetometer
SQUID NDE

ASJC Scopus subject areas

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

Access to Document

10.1016/S0921-4534(01)01148-0

Cite this

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title = "High-Tc SQUID magnetometers and gradiometers for NDE application",

abstract = "The performance of the superconducting quantum interference device (SQUID) nondestructive evaluation (NDE) system with a shielded magnetometer and unshielded gradiometers were investigated. In the magnetometer NDE system, the environmental noise was reduced with the SQUID seating inside a μ-metal cylinder, whereas the environmental noise was eliminated with electronic subtraction in the gradiometer NDE system. For the shielded magnetometer NDE system, the signal-to-noise ratio was improved with a higher excitation field to enhance the defect signal. For the gradiometer NDE system, the signal-to-noise ratio was improved as a result of the reduction of environmental noise. The performance of two SQUID NDE systems is compared and the results are discussed.",

keywords = "Gradiometer, Magnetometer, SQUID NDE",

author = "Jeng, {J. T.} and Horng, {H. E.} and Yang, {H. C.}",

note = "Funding Information: The authors thank the Ministry of Education of the ROC for the financial support under the Program for Promoting University Academic Excellence.",

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T1 - High-Tc SQUID magnetometers and gradiometers for NDE application

AU - Jeng, J. T.

AU - Horng, H. E.

AU - Yang, H. C.

N1 - Funding Information: The authors thank the Ministry of Education of the ROC for the financial support under the Program for Promoting University Academic Excellence.

PY - 2002/3/1

Y1 - 2002/3/1

N2 - The performance of the superconducting quantum interference device (SQUID) nondestructive evaluation (NDE) system with a shielded magnetometer and unshielded gradiometers were investigated. In the magnetometer NDE system, the environmental noise was reduced with the SQUID seating inside a μ-metal cylinder, whereas the environmental noise was eliminated with electronic subtraction in the gradiometer NDE system. For the shielded magnetometer NDE system, the signal-to-noise ratio was improved with a higher excitation field to enhance the defect signal. For the gradiometer NDE system, the signal-to-noise ratio was improved as a result of the reduction of environmental noise. The performance of two SQUID NDE systems is compared and the results are discussed.

AB - The performance of the superconducting quantum interference device (SQUID) nondestructive evaluation (NDE) system with a shielded magnetometer and unshielded gradiometers were investigated. In the magnetometer NDE system, the environmental noise was reduced with the SQUID seating inside a μ-metal cylinder, whereas the environmental noise was eliminated with electronic subtraction in the gradiometer NDE system. For the shielded magnetometer NDE system, the signal-to-noise ratio was improved with a higher excitation field to enhance the defect signal. For the gradiometer NDE system, the signal-to-noise ratio was improved as a result of the reduction of environmental noise. The performance of two SQUID NDE systems is compared and the results are discussed.

KW - Gradiometer

KW - Magnetometer

KW - SQUID NDE

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