A multi-channel high-Tc SQUID system and its application
Creators
- 1. Superconducting Sensor Laboratory, 1-1-1 Koya-Kita Itami, Hyogo 664 (Japan)
- 2. University of Tokushima, Medical School, 2-50 Kuramoto, Tokushima 770 (Japan)
- 3. Electrotechnical Laboratory, Umezono 1-1-4, Tsukuba, Ibaraki 305 (Japan)
Description
A multi-channel high-temperature superconducting interference device (high-Tc SQUID) system has been developed. Step edge junctions were employed for the SQUID. Magnetic field resolution was in the range 300-800 fT Hz-1/2 at 1 Hz, 150-450 fT Hz-1/2 at 10 Hz and 70 - 250 fT Hz-1/2 at 1 kHz. We have designed and developed 16-channel and 32-channel high-Tc SQUID systems. 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 clearly the R, S, and T wave peaks. A clear isofield contour map of magnetocardiac signals was also obtained. We also observed activities of the stomach using a tiny steel ball as a tracer. These data indicate that the use of the high-Tc SQUID is feasible for these biomagnetic applications. (author)
Availability note (English)
Available online at the Web site for the journal Superconductor Science and Technology (ISSN 1361-6668) http://www.iop.org/Additional details
Identifiers
- URL
- http://www.iop.org/;
Publishing Information
- Journal Title
- Superconductor Science and Technology
- Journal Volume
- 9
- Journal Issue
- 4A
- Journal Page Range
- p. A38-A41
- ISSN
- 0953-2048
Conference
- Title
- ISEC '95 (International Superconductive Electronics Conference)
- Dates
- 18-21 Sep 1995
- Place
- Nagoya (Japan)
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 32005328
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- DIAGNOSTIC USES; HIGH-TC SUPERCONDUCTORS; MULTI-CHANNEL ANALYZERS; SQUID DEVICES; SUPERCONDUCTING JUNCTIONS
- Descriptors DEC
- ELECTRONIC EQUIPMENT; EQUIPMENT; FLUXMETERS; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; PULSE ANALYZERS; SUPERCONDUCTING DEVICES; SUPERCONDUCTORS; TYPE-II SUPERCONDUCTORS; USES