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

Keywords

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

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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