Terahertz spectroscopy as a novel method for diagnosing the integrity of polymer insulated cables

Yoshimichi Ohki, Marina Komatsu, Maya Mizuno, Kaori Fukunaga

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    Through examinations of the applicability of novel terahertz spectroscopy to the diagnosis of integrity of polymeric insulated cables, the following important examples have been obtained. First, the attenuation of the reflected intensity of THz light was scanned over a low density polyethylene sheet with water trees under a polyvinylchloride sheet. As a result, its intensity distribution agrees with the distribution of water trees in the sample. Therefore, water trees would be visualizable even if they are invisible to naked eyes. Secondly, chemically cross-linked polyethylene sheets were irradiated by gamma-rays to certain designated doses. A peak appears at around 44 cm -1 (= 1.3 THz) when the dose is higher than 200 kGy. Combining the results obtained by instrumental analyses, the 44-cm -1 peak is likely to be due to oxidation-related dipoles. Thirdly, the reflected THz light intensities were compared among an uncorroded copper plate and three corroded plates with copper oxide, basic copper carbonate, and copper chloride. The last two corroded plates were found to exhibit absorption strong enough for the THz light to give clear images of corrosion.

    Original languageEnglish
    Title of host publicationAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
    Pages203-206
    Number of pages4
    DOIs
    Publication statusPublished - 2012
    Event2012 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2012 - Montreal, QC, Canada
    Duration: 2012 Oct 142012 Oct 17

    Other

    Other2012 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2012
    CountryCanada
    CityMontreal, QC
    Period12/10/1412/10/17

    Fingerprint

    Terahertz spectroscopy
    Polymers
    Cables
    Polyethylene
    Copper
    Water
    Copper oxides
    Low density polyethylenes
    Gamma rays
    Dosimetry
    Polyethylenes
    Chlorides
    Carbonates
    Corrosion
    Oxidation

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering

    Cite this

    Ohki, Y., Komatsu, M., Mizuno, M., & Fukunaga, K. (2012). Terahertz spectroscopy as a novel method for diagnosing the integrity of polymer insulated cables. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP (pp. 203-206). [6378756] https://doi.org/10.1109/CEIDP.2012.6378756

    Terahertz spectroscopy as a novel method for diagnosing the integrity of polymer insulated cables. / Ohki, Yoshimichi; Komatsu, Marina; Mizuno, Maya; Fukunaga, Kaori.

    Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2012. p. 203-206 6378756.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Ohki, Y, Komatsu, M, Mizuno, M & Fukunaga, K 2012, Terahertz spectroscopy as a novel method for diagnosing the integrity of polymer insulated cables. in Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP., 6378756, pp. 203-206, 2012 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2012, Montreal, QC, Canada, 12/10/14. https://doi.org/10.1109/CEIDP.2012.6378756
    Ohki Y, Komatsu M, Mizuno M, Fukunaga K. Terahertz spectroscopy as a novel method for diagnosing the integrity of polymer insulated cables. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2012. p. 203-206. 6378756 https://doi.org/10.1109/CEIDP.2012.6378756
    Ohki, Yoshimichi ; Komatsu, Marina ; Mizuno, Maya ; Fukunaga, Kaori. / Terahertz spectroscopy as a novel method for diagnosing the integrity of polymer insulated cables. Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2012. pp. 203-206
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