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Large Washer SQUID

  • S. Tanaka
  • H. Itozaki
  • H. Toyoda
  • K. Adachi
  • K. Okajima
  • T. Nagaishi
  • H. Kado

Abstract

Focussing effect of YBa2Cu3O7−y large washer SQUID and flux shielding plates were studied. Optimizing the hole size of the shielding plates, the flux capture area was improved up to 60% of the theoretical value. The field resolution was 370fT/Hz1/2 at 10Hz. We have developed a 16-channel high-Tc SQUID magnetometer system, and demonstrated that the 16 channel magnetocardiogram can be obtained. The devices used in this system were sealed by epoxy resin; there were no significant degradation of the SQUID performances after the heat cycles (room temperature to 77K) of 50 times.

Keywords

Heat Cycle Hole Size YBCO Film Outer Dimension YBCO Thin Film 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Tokyo 1994

Authors and Affiliations

  • S. Tanaka
    • 1
  • H. Itozaki
    • 1
  • H. Toyoda
    • 2
  • K. Adachi
    • 2
  • K. Okajima
    • 2
  • T. Nagaishi
    • 3
  • H. Kado
    • 4
  1. 1.Superconducting Sensor Laboratory Itami Lab.Itami, Hyogo, 664Japan
  2. 2.Superconducting Sensor Laboratory Central Lab.Inzai, ChibaJapan
  3. 3.Sumitomo Electric Industries, Ltd.Itami, Hyogo, 664Japan
  4. 4.Electrotechnical LaboratoryTsukuba, Ibaraki, 305Japan

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