Noise properties of highly balanced YBa2Cu3Oy directly coupled gradiometers and MCG measurement in magnetically unshielded environment

A. Tsukamoto, K. Yokosawa, T. Fukazawa, D. Suzuki, Keiji Tsukada, T. Miyashita, A. Kandori, K. Takagi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have fabricated a first-order, directly coupled gradiometer with a gradiometric balance below 0.1% without balance adjustment by selecting the coupling direction of the pickup coil and the superconducting quantum interference device. The noise of the gradiometers with various balances measured in an unshielded environment decreased in proportion to the improvement in balance. However, the noise of the gradiometer with a balance of 0.03% was limited by the gradient field component of the environmental noise. Magnetocardiogram measurement with this gradiometer in an unshielded environment was also demonstrated.

Original languageEnglish
Pages (from-to)41-44
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume368
Issue number1-4
DOIs
Publication statusPublished - Mar 1 2002
Externally publishedYes

Fingerprint

gradiometers
Pickups
SQUIDs
proportion
coils
adjusting
Direction compound
interference
gradients
sensors

Keywords

  • Gradiometer
  • SQUID
  • YBaCuO

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Noise properties of highly balanced YBa2Cu3Oy directly coupled gradiometers and MCG measurement in magnetically unshielded environment. / Tsukamoto, A.; Yokosawa, K.; Fukazawa, T.; Suzuki, D.; Tsukada, Keiji; Miyashita, T.; Kandori, A.; Takagi, K.

In: Physica C: Superconductivity and its Applications, Vol. 368, No. 1-4, 01.03.2002, p. 41-44.

Research output: Contribution to journalArticle

Tsukamoto, A. ; Yokosawa, K. ; Fukazawa, T. ; Suzuki, D. ; Tsukada, Keiji ; Miyashita, T. ; Kandori, A. ; Takagi, K. / Noise properties of highly balanced YBa2Cu3Oy directly coupled gradiometers and MCG measurement in magnetically unshielded environment. In: Physica C: Superconductivity and its Applications. 2002 ; Vol. 368, No. 1-4. pp. 41-44.
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