Separable Magnetic Shield with Magnetic Shaking Enhancement

• 田代 晋久

  九州大学大学院総合理工学研究科量子プロセス理工学専攻

• 笹田 一郎

  九州大学大学院総合理工学研究科量子プロセス理工学専攻

抄録

In this paper, we describe a separable cylindrical magnetic shield and a method for evaluating the magnetic shielding performance. A human size magnetic shield (Length: 1.5m, Inner diameter: 0.5m) consisting of two C-shaped building blocks was constructed. Building blocks were made by winding a cobalt-based amorphous ribbon, Metglas2705M, around a non-magnetic tube cut in half along lines parallel to the axis. The effect of the air gaps between the blocks on the shielding factor was examined by a miniature model of 1/10 size. The residual magnetic field inside the shield was measured using a commercial fluxgate magnetometer and a developed induction magnetometer with a noise level better than a few pT/√Hz. A static magnetic field less than 300 nT was achieved, and the noise floor was improved with magnetic shaking enhancement from 22 pT/√Hz to 3 pT/√Hz at 10 Hz. This is the first demonstration of the shaking effect on the noise level inside a separable magnetic shield evaluated between 10 Hz and 1 kHz.

収録刊行物

• 九州大学大学院総合理工学報告

  九州大学大学院総合理工学報告 26 (4), 383-388, 2005-03

  九州大学大学院総合理工学府

キーワード

• madnetic shield
• separable
• magnetic shaking
• induction sensor
• noise floor

詳細情報

• CRID: 1390009224836712320
• NII論文ID: 120001944212
• NII書誌ID: AA1147319X
• ISSN: 13467883
• DOI: 10.15017/16746
• HANDLE: 2324/16746
• NDL書誌ID: 7707731
• Web Site: http://id.ndl.go.jp/bib/7707731
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7707731
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用可