| Presentation | 2012-01-26 Development of non-destructive evaluation system using an HTS-SQUID gradiometer for magnetized materials Joji KAWANO, Akira TSUKAMOTO, Seiji ADACHI, Yasuo OSHIKUBO, Tsunehiro HATO, Keiichi TANABE, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Superconducting Quantum Interference Device (SQUID) sensor is one of the most sensitive magnetometers. Moreover, since SQUID has high magnetic sensitivity even at low frequencies, eddy-current non-destructive evaluation (NDE) using a SQUID sensor is expected to be applied to detection of deep-lying defects in conductive materials. However, in our conventional SQUID-NDE system, the SQUID sensor could not work correctly, when conductive materials have surface magnetization larger than 0.1 mT. In the present study, we have developed a new eddy-current non-destructive evaluation system using an HTS SQUID gradiometer with an external Cu pickup coil. By employing the external pickup coil method, the SQUID sensor can be set away from magnetized material and set inside a magnetic shield made of an HTS material. It makes possible to operate the SQUID correctly and to observe defect-induced magnetic signals from conductive materials with surface magnetization up to 10mT, although applicable bandwidth will be narrower due to the existence of normal conductivity. This result indicates the new SQUID-NDE system can detect defects located in the ferromagnetic materials that ever seem difficult to be observed. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Josephson junction / SQUID / Non-Destructive Evaluation / Magnetized material |
| Paper # | SCE2011-19 |
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| Conference Information | |
| Committee | SCE |
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| Conference Date | 2012/1/19(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Superconductive Electronics (SCE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Development of non-destructive evaluation system using an HTS-SQUID gradiometer for magnetized materials |
| Sub Title (in English) | |
| Keyword(1) | Josephson junction |
| Keyword(2) | SQUID |
| Keyword(3) | Non-Destructive Evaluation |
| Keyword(4) | Magnetized material |
| 1st Author's Name | Joji KAWANO |
| 1st Author's Affiliation | SRL-ISTEC() |
| 2nd Author's Name | Akira TSUKAMOTO |
| 2nd Author's Affiliation | SRL-ISTEC |
| 3rd Author's Name | Seiji ADACHI |
| 3rd Author's Affiliation | SRL-ISTEC |
| 4th Author's Name | Yasuo OSHIKUBO |
| 4th Author's Affiliation | SRL-ISTEC |
| 5th Author's Name | Tsunehiro HATO |
| 5th Author's Affiliation | SRL-ISTEC |
| 6th Author's Name | Keiichi TANABE |
| 6th Author's Affiliation | SRL-ISTEC |
| Date | 2012-01-26 |
| Paper # | SCE2011-19 |
| Volume (vol) | vol.111 |
| Number (no) | 418 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |