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Paper Abstract and Keywords
Presentation 2014-01-23 10:35
Design of HTS-SQUID gradiometer with an external HTS-multiturn thin film pick-up coil
Masayuki Teraoka (Tokyo Denki Univ.), Akira Tsukamoto, Seiji Adachi (ISTEC-SRL), Hiroshi Takai (Tokyo Denki Univ.), Keiichi Tanabe (ISTEC-SRL) SCE2013-38
Abstract (in Japanese) (See Japanese page) 
(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) 
(in English) SQUID / High-Tc superconductor / Superconducting flux transformer / Contact resistance / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 401, SCE2013-38, pp. 19-23, Jan. 2014.
Paper # SCE2013-38 
Date of Issue 2014-01-16 (SCE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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Conference Information
Committee SCE  
Conference Date 2014-01-23 - 2014-01-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikaishinkou-kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Thin film, device technologies and their applications, etc. 
Paper Information
Registration To SCE 
Conference Code 2014-01-SCE 
Language Japanese 
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  
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1st Author's Name Masayuki Teraoka  
1st Author's Affiliation Tokyo Denki University (Tokyo Denki Univ.)
2nd Author's Name Akira Tsukamoto  
2nd Author's Affiliation International Superconductivity Technology Center-Superconductivity Research Laboratory (ISTEC-SRL)
3rd Author's Name Seiji Adachi  
3rd Author's Affiliation International Superconductivity Technology Center-Superconductivity Research Laboratory (ISTEC-SRL)
4th Author's Name Hiroshi Takai  
4th Author's Affiliation Tokyo Denki University (Tokyo Denki Univ.)
5th Author's Name Keiichi Tanabe  
5th Author's Affiliation International Superconductivity Technology Center-Superconductivity Research Laboratory (ISTEC-SRL)
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Speaker Author-1 
Date Time 2014-01-23 10:35:00 
Presentation Time 25 minutes 
Registration for SCE 
Paper # SCE2013-38 
Volume (vol) vol.113 
Number (no) no.401 
Page pp.19-23 
#Pages 5 
Date of Issue 2014-01-16 (SCE) 

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