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 journalArticle

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-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.

Original languageEnglish
Pages (from-to)6513-6518
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume44
Issue number9 A
DOIs
Publication statusPublished - Sep 8 2005

Fingerprint

SQUIDs
magnetocardiography
readout
alternating current
Electronic equipment
direct current
Control systems
interference
controllers
Magnetocardiography
electronics
oscillators
white noise
Temperature
cross correlation
Controllers
Correlation methods
electric potential
White noise
Fast Fourier transforms

Keywords

  • Control sequence
  • High T
  • Magnetocardiograph
  • Readout
  • SQUID

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Control system for readout electronics of multi-channel magnetocardiographs using high-temperature DC superconducting quantum interference devices. / Kandori, Akihiko; Suzuki, Daisuke; Tsukamoto, Akira; Kumagai, Yukio; Miyashita, Tsuyoshi; Ogata, Kuniomi; Seki, Yusuke; Yokosawa, Koichi; Tsukada, Keiji.

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 journalArticle

Kandori, Akihiko ; Suzuki, Daisuke ; Tsukamoto, Akira ; Kumagai, Yukio ; Miyashita, Tsuyoshi ; Ogata, Kuniomi ; Seki, Yusuke ; Yokosawa, Koichi ; Tsukada, Keiji. / Control system for readout electronics of multi-channel magnetocardiographs using high-temperature DC superconducting quantum interference devices. In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers. 2005 ; Vol. 44, No. 9 A. pp. 6513-6518.
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AU - Miyashita, Tsuyoshi

AU - Ogata, Kuniomi

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