Nondestructive evaluation of flaws using SQUIDs

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

    Research output: Contribution to journalConference articlepeer-review

    5 Citations (Scopus)

    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.

    Original languageEnglish
    Pages (from-to)2637-2638
    Number of pages2
    JournalPhysica C: Superconductivity and its applications
    Volume341-348 (IV)
    DOIs
    Publication statusPublished - 2000 Nov
    EventInternational Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI - Houston, TX, USA
    Duration: 2000 Feb 202000 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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