Highly sensitive measurement of moisture content using HTS-SQUID

Keiji Tsukada, Toshihiko Kiwa, Hideaki Tahara, Etsuro Miyake, Hironobu Yamada, Akira Tsukamoto, Akihiko Kandori

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We developed a highly sensitive magnetic system for measuring moisture content using an HTS-SQUID sensor. The system consists mainly of an exposure coil, a Dewar flask containing HTS-SQUID immersed in liquid nitrogen, a cancellation coil, a lock-in amplifier, magnetically shielded box, and FLL circuit. The cancellation coil was used to eliminate the applied magnetic field at the sensor position, and then a cancellation ratio of more than -40 dB was obtained. By the high performance, the subject can be exposed to a powerful magnetic field strength in the order of μT, and a weak magnetic signal of less than tens of pT from the subject can be detected. Using a magnetic vector analysis technique, more precise measurement of moisture content is realized.

Original languageEnglish
Article number5075618
Pages (from-to)878-881
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume19
Issue number3
DOIs
Publication statusPublished - Jun 2009

Fingerprint

SQUIDs
cancellation
moisture content
Moisture
coils
Magnetic fields
Dewars
Sensors
Liquid nitrogen
vector analysis
flasks
magnetic signals
sensors
magnetic fields
liquid nitrogen
boxes
Networks (circuits)
field strength
amplifiers

Keywords

  • Diamagnetism
  • HTS-SQUID
  • Magnetic cancellation
  • Moisture content

ASJC Scopus subject areas

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

Cite this

Highly sensitive measurement of moisture content using HTS-SQUID. / Tsukada, Keiji; Kiwa, Toshihiko; Tahara, Hideaki; Miyake, Etsuro; Yamada, Hironobu; Tsukamoto, Akira; Kandori, Akihiko.

In: IEEE Transactions on Applied Superconductivity, Vol. 19, No. 3, 5075618, 06.2009, p. 878-881.

Research output: Contribution to journalArticle

Tsukada, Keiji ; Kiwa, Toshihiko ; Tahara, Hideaki ; Miyake, Etsuro ; Yamada, Hironobu ; Tsukamoto, Akira ; Kandori, Akihiko. / Highly sensitive measurement of moisture content using HTS-SQUID. In: IEEE Transactions on Applied Superconductivity. 2009 ; Vol. 19, No. 3. pp. 878-881.
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