Control System for Readout Electronics of Multi-Channel Magnetocardiographs Using High-Temperature DC Superconducting Quantum Interference Devices
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概要
- 論文の詳細を見る
We aimed to develop a control system for multichannel magnetocardiography (MCG) based on a high-temperature DC superconducting quantum interference device (high-$T_{\text{c}}$ SQUID). To create this system, we used one oscillator as an AC bias controller to operate a multichannel high-$T_{\text{c}}$ SQUID. To optimize the SQUID parameters (such as the AC bias, offset voltage), two new control sequences based on a cross-correlation method and a fast Fourier transform method were developed. Using the AC bias controller and the sequences, the typical white noise level of the SQUID was about 50–60 fT Hz-1/2 around 100 Hz. Multichannel MCG signals were detected clearly in the system with the SQUIDs. We conclude that our control system with one oscillator and new protocols can reliably operate a multichannel SQUID.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-09-15
著者
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Tsukamoto Akira
Advanced Research Laboratory Hitachi Ltd.
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Suzuki Daisuke
Central Research Laboratory Hitachi Ltd
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Yokosawa Koichi
Advanced Research Laboratory Hitachi Ltd.
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Tsukada Keiji
Central Research Laboratory Hitachi Ltd.
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MIYASHITA Tsuyoshi
Advanced Research Laboratory, Hitachi Ltd., Bio and Medical Solution Laboratory
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Kandori Akihiko
Central Research Laboratory Hitachi Ltd.
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Ogata Kuniomi
Advanced Research Laboratory Hitachi Ltd
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Tsukada Keiji
Central Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
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Kumagai Yukio
Central Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
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Seki Yusuke
Central Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
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Yokosawa Koichi
Advanced Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
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Tsukamoto Akira
Advanced Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
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Suzuki Daisuke
Central Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
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Ogata Kuniomi
Advanced Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
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Kandori Akihiko
Central Research Laboratory, Hitachi, Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan
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