Control system for readout electronics of multi-channel magnetocardiographs using high-temperature DC superconducting quantum interference devices

Akihiko Kandori; Daisuke Suzuki; Akira Tsukamoto; Yukio Kumagai; Tsuyoshi Miyashita; Kuniomi Ogata; Yusuke Seki; Koichi Yokosawa; Keiji Tsukada

doi:10.1143/JJAP.44.6513

Control system for readout electronics of multi-channel magnetocardiographs using high-temperature DC superconducting quantum interference devices

Akihiko Kandori, Daisuke Suzuki, Akira Tsukamoto, Yukio Kumagai, Tsuyoshi Miyashita, Kuniomi Ogata, Yusuke Seki, Koichi Yokosawa, Keiji Tsukada

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We aimed to develop a control system for multichannel magnetocardiography (MCG) based on a high-temperature DC superconducting quantum interference device (high-T_c SQUID). To create this system, we used one oscillator as an AC bias controller to operate a multichannel high-T_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 50-60fTHz^-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.

Original language	English
Pages (from-to)	6513-6518
Number of pages	6
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	44
Issue number	9 A
DOIs	https://doi.org/10.1143/JJAP.44.6513
Publication status	Published - Sept 8 2005

Keywords

Control sequence
High T
Magnetocardiograph
Readout
SQUID

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.44.6513

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Kandori, A., Suzuki, D., Tsukamoto, A., Kumagai, Y., Miyashita, T., Ogata, K., Seki, Y., Yokosawa, K., & Tsukada, K. (2005). Control system for readout electronics of multi-channel magnetocardiographs using high-temperature DC superconducting quantum interference devices. Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 44(9 A), 6513-6518. https://doi.org/10.1143/JJAP.44.6513

Control system for readout electronics of multi-channel magnetocardiographs using high-temperature DC superconducting quantum interference devices. / Kandori, Akihiko; Suzuki, Daisuke; Tsukamoto, Akira et al.
In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 44, No. 9 A, 08.09.2005, p. 6513-6518.

Research output: Contribution to journal › Article › peer-review

Kandori, A, Suzuki, D, Tsukamoto, A, Kumagai, Y, Miyashita, T, Ogata, K, Seki, Y, Yokosawa, K & Tsukada, K 2005, 'Control system for readout electronics of multi-channel magnetocardiographs using high-temperature DC superconducting quantum interference devices', Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, vol. 44, no. 9 A, pp. 6513-6518. https://doi.org/10.1143/JJAP.44.6513

Kandori A, Suzuki D, Tsukamoto A, Kumagai Y, Miyashita T, Ogata K et al. Control system for readout electronics of multi-channel magnetocardiographs using high-temperature DC superconducting quantum interference devices. Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers. 2005 Sept 8;44(9 A):6513-6518. doi: 10.1143/JJAP.44.6513

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abstract = "We aimed to develop a control system for multichannel magnetocardiography (MCG) based on a high-temperature DC superconducting quantum interference device (high-Tc SQUID). To create this system, we used one oscillator as an AC bias controller to operate a multichannel high-Tc 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 50-60fTHz-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.",

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AU - Suzuki, Daisuke

AU - Tsukamoto, Akira

AU - Kumagai, Yukio

AU - Miyashita, Tsuyoshi

AU - Ogata, Kuniomi

AU - Seki, Yusuke

AU - Yokosawa, Koichi

AU - Tsukada, Keiji

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AB - We aimed to develop a control system for multichannel magnetocardiography (MCG) based on a high-temperature DC superconducting quantum interference device (high-Tc SQUID). To create this system, we used one oscillator as an AC bias controller to operate a multichannel high-Tc 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 50-60fTHz-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.

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Control system for readout electronics of multi-channel magnetocardiographs using high-temperature DC superconducting quantum interference devices

Abstract

Keywords

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