Nondestructive evaluation of flaws using SQUIDs

J. T. Jeng; H. E. Horng; Chao Hsiang Chen; J. H. Chen; H. C. Yang

doi:10.1016/S0921-4534(00)01430-1

Nondestructive evaluation of flaws using SQUIDs

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

^*Corresponding author for this work

Undergraduate Program of Electro-Optical Engineering

Research output: Contribution to journal › Conference article › peer-review

5 Citations (Scopus)

Abstract

Using high-T_c SQUIDs, we have designed a nondestructive evaluation system to probe buried flaws. The frequency of the excitation magnetic fields was varied from 10 to 800 Hz and the magnetic fields generated from the eddy current was lock-in detected. The SQUIDs output data revealed the most effective excitation frequencies for the flaws with different depths and widths. The signal-to-noise ratio of the deep flaws can be further enhanced either by using higher excitation fields or using the SQUIDs with higher low-frequency sensitivity.

Original language	English
Pages (from-to)	2637-2638
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	341-348 (IV)
DOIs	https://doi.org/10.1016/S0921-4534(00)01430-1
Publication status	Published - 2000 Nov
Event	International Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI - Houston, TX, USA Duration: 2000 Feb 20 → 2000 Feb 25

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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10.1016/S0921-4534(00)01430-1

Cite this

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title = "Nondestructive evaluation of flaws using SQUIDs",

abstract = "Using high-Tc SQUIDs, we have designed a nondestructive evaluation system to probe buried flaws. The frequency of the excitation magnetic fields was varied from 10 to 800 Hz and the magnetic fields generated from the eddy current was lock-in detected. The SQUIDs output data revealed the most effective excitation frequencies for the flaws with different depths and widths. The signal-to-noise ratio of the deep flaws can be further enhanced either by using higher excitation fields or using the SQUIDs with higher low-frequency sensitivity.",

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

note = "Funding Information: *Supported by the National Science Council of R.O.C under grant No. NSC-89-2112-M-003-012 and No. NSC-89-2112-M-002-029; International Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI ; Conference date: 20-02-2000 Through 25-02-2000",

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doi = "10.1016/S0921-4534(00)01430-1",

language = "English",

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journal = "Physica C: Superconductivity and its applications",

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TY - JOUR

T1 - Nondestructive evaluation of flaws using SQUIDs

AU - Jeng, J. T.

AU - Horng, H. E.

AU - Chen, Chao Hsiang

AU - Chen, J. H.

AU - Yang, H. C.

N1 - Funding Information: *Supported by the National Science Council of R.O.C under grant No. NSC-89-2112-M-003-012 and No. NSC-89-2112-M-002-029

PY - 2000/11

Y1 - 2000/11

N2 - Using high-Tc SQUIDs, we have designed a nondestructive evaluation system to probe buried flaws. The frequency of the excitation magnetic fields was varied from 10 to 800 Hz and the magnetic fields generated from the eddy current was lock-in detected. The SQUIDs output data revealed the most effective excitation frequencies for the flaws with different depths and widths. The signal-to-noise ratio of the deep flaws can be further enhanced either by using higher excitation fields or using the SQUIDs with higher low-frequency sensitivity.

AB - Using high-Tc SQUIDs, we have designed a nondestructive evaluation system to probe buried flaws. The frequency of the excitation magnetic fields was varied from 10 to 800 Hz and the magnetic fields generated from the eddy current was lock-in detected. The SQUIDs output data revealed the most effective excitation frequencies for the flaws with different depths and widths. The signal-to-noise ratio of the deep flaws can be further enhanced either by using higher excitation fields or using the SQUIDs with higher low-frequency sensitivity.

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U2 - 10.1016/S0921-4534(00)01430-1

DO - 10.1016/S0921-4534(00)01430-1

M3 - Conference article

AN - SCOPUS:0342961948

SN - 0921-4534

VL - 341-348 (IV)

SP - 2637

EP - 2638

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

T2 - International Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI

Y2 - 20 February 2000 through 25 February 2000

ER -

Nondestructive evaluation of flaws using SQUIDs

Abstract

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