| Presentation | 2014-01-23 Design of HTS-SQUID gradiometer with an external HTS-multiturn thin film pick-up coil Masayuki Teraoka, Akira Tsukamoto, Seiji Adachi, Hiroshi Takai, Keiichi Tanabe, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Highly-sensitive HTS-SQUIDs are applied to various systems such as eddy-current non-destructive evaluation (NDE) and compact magnetometer systems. To avoid unstable operation of the SQUID due to an excitation field, a flux transformer made of normal Cu wire is used to separate the pick-up coil and SQUID. However, the resistance of the flux transformer generates thermal noise and reduces the signal bandwidth at low frequencies. In this study, we investigate use of a superconducting flux transformer (SFT). The SFT consists of pickup and input coils made of HTS thin films. The two coils are connected by using an HTS coated conductor. The input coil is stacked on an HTS thin film gradiometer. From the measured results of resistances of the connections between each coil and the coated conductor, it was found that the resistance of bonding wire was a dominant component. The estimated resistance of the SFT was 7.2 mΩ, corresponding to a lower cut-off frequency of 11.7 Hz. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | SQUID / High-Tc superconductor / Superconducting flux transformer / Contact resistance |
| Paper # | SCE2013-38 |
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| Conference Information | |
| Committee | SCE |
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| Conference Date | 2014/1/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| 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) | Design of HTS-SQUID gradiometer with an external HTS-multiturn thin film pick-up coil |
| Sub Title (in English) | |
| Keyword(1) | SQUID |
| Keyword(2) | High-Tc superconductor |
| Keyword(3) | Superconducting flux transformer |
| Keyword(4) | Contact resistance |
| 1st Author's Name | Masayuki Teraoka |
| 1st Author's Affiliation | Superconductivity Research Laboratory - ISTEC:Tokyo Denki University() |
| 2nd Author's Name | Akira Tsukamoto |
| 2nd Author's Affiliation | Superconductivity Research Laboratory - ISTEC |
| 3rd Author's Name | Seiji Adachi |
| 3rd Author's Affiliation | Superconductivity Research Laboratory - ISTEC |
| 4th Author's Name | Hiroshi Takai |
| 4th Author's Affiliation | Tokyo Denki University |
| 5th Author's Name | Keiichi Tanabe |
| 5th Author's Affiliation | Superconductivity Research Laboratory - ISTEC |
| Date | 2014-01-23 |
| Paper # | SCE2013-38 |
| Volume (vol) | vol.113 |
| Number (no) | 401 |
| Page | pp.pp.- |
| #Pages | 5 |
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