Multi-Channel High T_c SQUID (Special Section on Superconducting Devices)
スポンサーリンク
概要
- 論文の詳細を見る
A multi-channel high temperature superconducting interference device (high T_c SQUID) system with high magnetic field resolution has been developed. Step edge junctions were employed as weakly coupled Josephson junctions for the SQUID. These junctions worked well and their I-V curves fit the resistively shunted junction (RSJ) model. The SQUID design was investigated to improve magnetic field resolution. The size of the SQUID's center hole was investigated, and we found the optimized size of the hole to be about 25 μm. Meissner effect of superconductor was used in order to concentrate magnetic fluxes. A large washer SQUID and a flux concentrating plate was developed to concentrate magnetic flux to the SQUID center hole. The magnetic field resolution became 370 fT/√<Hz> at 10 Hz and 220 fT/√<Hz> at 10 kHz. This field resolution was enough to detect biomagnetic signals such as magnetocardiac signals. The SQUID was mounted on a special chip carrier and was sealed with epoxy resin for protection from humidity. We have designed and developed a 4-channel and a 16-channel high T_c SQUID system. We used them in a magnetically shielded room to measure magnetic signals of the human heart. We obtained clear multi-channel magnetocardiac signals, which showed clear so called QRS and T wave peaks. A clear isofield contour map of magnetocardiac signals was also obtained. These data indicated that high T_c SQUID is feasible for these biomagnetic applications.
- 社団法人電子情報通信学会の論文
- 1994-08-25
著者
-
Itozaki Hideo
Superconducting Sensor Laboratory Itami Laboratory
-
Kado Hisashi
Electrotechnical Laboratory
-
Tanaka S
Superconducting Sensor Laboratory Itami Laboratory
-
Itozaki Hideo
the Superconducting Sensor Laboratory, Itami Laboratory
-
Tanaka Saburo
the Superconducting Sensor Laboratory, Itami Laboratory
-
Nagaishi Tatsuoki
the Sumitomo Electric Industries, Itami Research Laboratory
-
Kado H
Applied Electronic Laboratory Kanazawa Institute Of Technology
-
Kado Hisashi
Electrotechnical Laboratory Agency Of Industrial Science And Technology
-
Itozaki H
Sumitomo Electric Ind. Ltd. Itami‐shi Jpn
-
Itozaki Hideo
Superconducting Sensor Laboratory
-
Kado H
Superconducting Sensor Laboratory:(present Address) Tokyo Office Of Human Information System Laborat
-
Nagaishi T
The Author Is With Sumitomo Electric Hightechs Co. Ltd.
-
Nagaishi T
System & Electronic Equipment Division Sumitomo Electric Hightechs Co. Ltd.
-
Kado Hisashi
Applied Electronic Laboratory Kanazawa Institute Of Technology
関連論文
- HTS-rf-SQUIDを用いた低磁場NMRに関する研究
- ロボット式モバイルHTS-SQUID非破壊検査装置による水素燃料タンクの欠陥検出
- 移動する磁気微粒子検出のためのマルチチャンネルHTS-SQUIDシステムの開発
- 磁場耐性の高いHTS-SQUIDを用いたロボット式モバイル非破壊検査装置
- 超電導SQUID技術 (特集 超電導技術の最近の動向)
- 第51回応用物理学関係連合講演会(2004年)
- High-T_c Superconducting Quantum Interference Device with Additional Positive Feedback
- 有限要素法による多層磁気シールドルーム開口部の漏洩磁界に関する検討
- 磁気シールドルーム開口部の漏洩磁界に関する検討
- GaInAsP/InP Long Wavelength Quantum-Wire Lasers
- [Invited]GaInAsP/InP Long Wavelength Quantum-Wire Lasers
- Room Temperature-Copntinuous Wave Operation of GaInAsP/InP Multiple-Quantum-Wire Lasers by Dry Etching and Regrowth Method
- Multi-Channel High T_c SQUID (Special Section on Superconducting Devices)
- Properties of YBa_2Cu_3O_ Large Washer SQUID
- YBa_2Cu_3O_ Thin Film Prepared by Laser Ablation
- 冷凍機冷却HTS-SQUIDグラジオメータを用いたロボットアーム式モバイル非破壊検査装置の開発
- Loudness and noisiness of a repeated impact sound : Results of round robin tests in Japan(II)
- 高温超電導SQUIDを用いたアルミ撚り線の素線断線の検出
- 高温超電導SQUIDを用いた電力用アルミ撚り線の断線非破壊検査
- 冷凍機を用いたSQUID非破壊検査システム : 振動特性と温度特性
- Multiloop Superconducting Quantum Interference Devices with Nb/Al-AlO_x-Al/Nb Edge Junctions
- Design and Fabrication of a Multi Loop Superconducting Quantum Interference Device, the Clover-Leaf Superconducting Quantum Interference Device
- Superconducting Quantum Interference Device Voltage Swing Related to Additional Positive Feedback Parameters
- Fabrication of High-Quality Nb/Al-AlO_x-Al/Nb Junctions by a Simple Process
- Fabrication and Evaluation of Superconducting Quantum Interference Devices with Nb/Al-AlO_x-Al/Nb Edge Junctions
- Asymmetric Bias Injection Technique for Drung-Type Superconducting Quantum Interference Devices
- 高温超伝導SQUIDを用いた水素燃料用CFRP積層アルミライナーの非破壊検査
- Equal-loudness level contours for pure tone under free field listening conditions (I) : Some data and considerations on experimental conditions
- ロボット式モバイルHTS-SQUID非破壊検査装置
- SQUID高感度磁気センサを用いた磁性金属微粒子の検出
- 低磁場SQUID-NMRシステムの開発
- ロボットアームを用いた冷凍機冷却モバイルHTS-SQUID非破壊検査システム
- HTS SQUIDを用いた非破壊検査技術の開発--金属配管の微小欠陥の検出
- HTS SQUIDを用いた非破壊検査技術の開発 : 金属配管へのSQUID NDEの適用(SQUID,一般)
- HTS SQUIDを用いた非破壊検査技術の開発 : 金属配管へのSQUID NDEの適用
- HTS SQUID グラジオメータを用いた異種金属接合の非破壊評価
- 高温超伝導SQUIDを用いた食品内異物検査の現状と展望
- A 35-Series Superconducting Quantum Interference Device Array for High-Dynamic-Range Magnetic Measurements
- Multi-Channel SQUID Systems for Biomagnetic Measurement(Special Issue on Superconductor Digital/Analog Circuit Technologies)
- High-T_c SQUID Metal Detection System for Food and Pharmaceutical Contaminants(SQUIDs, Superconducting Electronic Devices and Their Applications)
- レーザSQUID顕微鏡を用いた評価システムの作製
- Mechanically Stacked GaAs/GaInAsP Dual-Junction Solar Cell with High Conversion Efficiency of More than 31%
- 5×5cm^2 GaAs and GaInAs Solar Cells with High Conversion Efficiency
- Development of a TDEM Data Acquisition System Based on a SQUID Magnetometer for Mineral Exploration
- 高温超伝導 SQUID を用いた銅製伝熱管表面の微細欠陥の非破壊検査
- 食品製造に求められる高感度異物検出技術 (特集 食品製造プロセスにおける異物検査と殺菌・衛生技術)
- 最先端食品内金属異物検出技術
- Multi-Channel SQUID
- Noise Characteristics of dc Superconducting Quantum Interference Device with Additional Positive Feedback
- HTS SQUIDを用いた食品中金属異物検査装置の開発
- Flux Noise from a Metal Surrounding a Superconducting Wire Applied to a Gradiometer
- Growth of Buffer Layers on Si Substrate for High-T_c Superconducting Thin Films
- Crystal Orientation of YBa_2Cu_3O_ Thin Films Prepared by RF Sputtering
- Heteroepitaxial Growth of Y-Ba-Cu-O/Bi-Sr-Cu-O/Y-Ba-Cu-O
- Epitaxial Growth of MgO Layer on Y_1Ba_2Cu_3O_ Thin Film
- 冷凍機冷却型HTS-SQUIDを用いた銅製伝熱管表面の微細欠陥の検出
- 工場内銅管検査のためのSQUID非破壊検査装置の開発
- HTS-rf-SQUIDを用いた超低磁場MRIシステムの開発(超伝導センシング基盤技術及びその応用,一般)
- 赤外光温度制御装置を用いたHTS SQUID冷凍機冷却システムの検討
- 超電導SQUID技術 (特集 超電導応用技術の開発動向) -- (超電導の産業応用技術動向)
- 高温超伝導SQUIDを用いた食品内異物検査とDNA診断応用
- 高温超伝導量子干渉素子(SQUID)を用いた新しい応用計測の可能性
- SQUID開発動向(ASC2002)