HTS planar gradiometer consisting of SQUID with multi-turn input coil and large pickup coil made of GdBCO coated conductor

Akira Tsukamoto, Seiji Adachi, Yasuo Oshikubo, Tsunehiro Hato, Keiji Enpuku, Masaki Sugisaki, Eiichi Arai, Keiichi Tanabe

研究成果: ジャーナルへの寄稿記事

抄録

We have investigated the fabrication of a high-temperature superconducting (HTS) gradiometer with long baseline for geophysical applications. The proof-of-concept gradiometer using a 1-turn pickup coil made of a GdBa 2Cu3Oy coated conductor (GCC) and 5.5-turn input coil integrated on a SQUID was fabricated in our previous work. In this study, we have optimized the device structure to improve the frequency response, gradient field sensitivity and gradiometer balance. The fabricated flux transformer consists of a 6-turn planar gradiometric pickup coil and a 26-turn input coil made of an HTS thin film. A low-melting-point alloy was used to connect polished Ag surfaces of the CGG pickup coil and Au pads of the input coil. An HTS SQUID was formed on another substrate and stacked on the input coil. A mechanical balancing structure using three pieces of GCC as a superconducting shield was also implemented. The fabricated gradiometer showed a gradient field noise of 0.8 fT/cm Hz1/2 in the white noise regions, a gradiometer balance of 1/142, and a cutoff frequency of 9 Hz corresponding to a 2 mΩ contact resistance between the pickup coil and the input coil.

元の言語英語
ページ(範囲)191-194
ページ数4
ジャーナルPhysica C: Superconductivity and its Applications
484
DOI
出版物ステータス出版済み - 1 15 2013

Fingerprint

gradiometers
Pickups
SQUIDs
coils
conductors
sensors
Temperature
Superconducting films
Cutoff frequency
White noise
Contact resistance
Frequency response
Melting point
Fluxes
Fabrication
gradients
Substrates
bedrock
white noise
contact resistance

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

これを引用

HTS planar gradiometer consisting of SQUID with multi-turn input coil and large pickup coil made of GdBCO coated conductor. / Tsukamoto, Akira; Adachi, Seiji; Oshikubo, Yasuo; Hato, Tsunehiro; Enpuku, Keiji; Sugisaki, Masaki; Arai, Eiichi; Tanabe, Keiichi.

:: Physica C: Superconductivity and its Applications, 巻 484, 15.01.2013, p. 191-194.

研究成果: ジャーナルへの寄稿記事

Tsukamoto, Akira ; Adachi, Seiji ; Oshikubo, Yasuo ; Hato, Tsunehiro ; Enpuku, Keiji ; Sugisaki, Masaki ; Arai, Eiichi ; Tanabe, Keiichi. / HTS planar gradiometer consisting of SQUID with multi-turn input coil and large pickup coil made of GdBCO coated conductor. :: Physica C: Superconductivity and its Applications. 2013 ; 巻 484. pp. 191-194.
@article{779221b5bc14464f8709390cf7e28f4b,
title = "HTS planar gradiometer consisting of SQUID with multi-turn input coil and large pickup coil made of GdBCO coated conductor",
abstract = "We have investigated the fabrication of a high-temperature superconducting (HTS) gradiometer with long baseline for geophysical applications. The proof-of-concept gradiometer using a 1-turn pickup coil made of a GdBa 2Cu3Oy coated conductor (GCC) and 5.5-turn input coil integrated on a SQUID was fabricated in our previous work. In this study, we have optimized the device structure to improve the frequency response, gradient field sensitivity and gradiometer balance. The fabricated flux transformer consists of a 6-turn planar gradiometric pickup coil and a 26-turn input coil made of an HTS thin film. A low-melting-point alloy was used to connect polished Ag surfaces of the CGG pickup coil and Au pads of the input coil. An HTS SQUID was formed on another substrate and stacked on the input coil. A mechanical balancing structure using three pieces of GCC as a superconducting shield was also implemented. The fabricated gradiometer showed a gradient field noise of 0.8 fT/cm Hz1/2 in the white noise regions, a gradiometer balance of 1/142, and a cutoff frequency of 9 Hz corresponding to a 2 mΩ contact resistance between the pickup coil and the input coil.",
author = "Akira Tsukamoto and Seiji Adachi and Yasuo Oshikubo and Tsunehiro Hato and Keiji Enpuku and Masaki Sugisaki and Eiichi Arai and Keiichi Tanabe",
year = "2013",
month = "1",
day = "15",
doi = "10.1016/j.physc.2012.03.006",
language = "English",
volume = "484",
pages = "191--194",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",

}

TY - JOUR

T1 - HTS planar gradiometer consisting of SQUID with multi-turn input coil and large pickup coil made of GdBCO coated conductor

AU - Tsukamoto, Akira

AU - Adachi, Seiji

AU - Oshikubo, Yasuo

AU - Hato, Tsunehiro

AU - Enpuku, Keiji

AU - Sugisaki, Masaki

AU - Arai, Eiichi

AU - Tanabe, Keiichi

PY - 2013/1/15

Y1 - 2013/1/15

N2 - We have investigated the fabrication of a high-temperature superconducting (HTS) gradiometer with long baseline for geophysical applications. The proof-of-concept gradiometer using a 1-turn pickup coil made of a GdBa 2Cu3Oy coated conductor (GCC) and 5.5-turn input coil integrated on a SQUID was fabricated in our previous work. In this study, we have optimized the device structure to improve the frequency response, gradient field sensitivity and gradiometer balance. The fabricated flux transformer consists of a 6-turn planar gradiometric pickup coil and a 26-turn input coil made of an HTS thin film. A low-melting-point alloy was used to connect polished Ag surfaces of the CGG pickup coil and Au pads of the input coil. An HTS SQUID was formed on another substrate and stacked on the input coil. A mechanical balancing structure using three pieces of GCC as a superconducting shield was also implemented. The fabricated gradiometer showed a gradient field noise of 0.8 fT/cm Hz1/2 in the white noise regions, a gradiometer balance of 1/142, and a cutoff frequency of 9 Hz corresponding to a 2 mΩ contact resistance between the pickup coil and the input coil.

AB - We have investigated the fabrication of a high-temperature superconducting (HTS) gradiometer with long baseline for geophysical applications. The proof-of-concept gradiometer using a 1-turn pickup coil made of a GdBa 2Cu3Oy coated conductor (GCC) and 5.5-turn input coil integrated on a SQUID was fabricated in our previous work. In this study, we have optimized the device structure to improve the frequency response, gradient field sensitivity and gradiometer balance. The fabricated flux transformer consists of a 6-turn planar gradiometric pickup coil and a 26-turn input coil made of an HTS thin film. A low-melting-point alloy was used to connect polished Ag surfaces of the CGG pickup coil and Au pads of the input coil. An HTS SQUID was formed on another substrate and stacked on the input coil. A mechanical balancing structure using three pieces of GCC as a superconducting shield was also implemented. The fabricated gradiometer showed a gradient field noise of 0.8 fT/cm Hz1/2 in the white noise regions, a gradiometer balance of 1/142, and a cutoff frequency of 9 Hz corresponding to a 2 mΩ contact resistance between the pickup coil and the input coil.

UR - http://www.scopus.com/inward/record.url?scp=84875654955&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875654955&partnerID=8YFLogxK

U2 - 10.1016/j.physc.2012.03.006

DO - 10.1016/j.physc.2012.03.006

M3 - Article

AN - SCOPUS:84875654955

VL - 484

SP - 191

EP - 194

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

ER -