Magnetometer utilizing SQUID pico-voltmeter and cooled normal pickup coil

Tong Qing Yang, Kenichiro Yao, Daisuke Yamasaki, Keiji Enpuku

研究成果: Contribution to journalConference article査読

1 被引用数 (Scopus)

抄録

Magnetometer utilizing a high-Tc SQUID pico-voltometer and cooled normal pickup coil has been developed. The pickup coil was made of copper wire, and cooled to T = 77 K in order to decrease thermal noise from resistance. Total voltage noise of the SQUID pico-voltmeter with a cooled pickup coil was 124 pV/Hz1/2 and 96 pV/Hz1/2 at 100 Hz and 1 kHz, respectively, when resistance of the coil was 1.5 Ω. The magnetic field noise of the magnetometer was 130 pT/Hz1/2 and 10 pT/Hz 1/2 at 100 Hz and 1 kHz for the pickup coil with 4.4 mm diameter, respectively. Application of the magnetometer to non-destructive evaluation was presented. It is shown that small crack inside Cu plate can be detected with this system in unshielded environment. It was also shown that scanning of the pickup coil in unshielded environment is possible without degradation of the system performance.

本文言語英語
ページ(範囲)1596-1600
ページ数5
ジャーナルPhysica C: Superconductivity and its applications
426-431
II
DOI
出版ステータス出版済み - 2005
イベントProceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity -
継続期間: 11 23 200411 25 2004

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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