Back to Search
Start Over
High-TC SQUID Magnetometers for Low Noise Measurements of Magnetocardiograms.
- Source :
- IEEE Transactions on Applied Superconductivity; Jun2005 Part 1 of 3, Vol. 15 Issue 2, p652-655, 4p
- Publication Year :
- 2005
-
Abstract
- YBCO dc superconducting quantum interference device (SQUID) magnetometers based on bicrystal junctions have been fabricated for magnetocardiograph measurements. The pickup coil of the device was designed employing 16 parallel loops with 50-μm-wide lines. Noise performance was improved by applying a modification in the coupling line between pickup loop and SQUID washer. We could obtain optimized SQUID magnetometer design having magnetic field noise of about 38 fT/Hz<superscript>1/2</superscript> at 1 Hz and about 20 fT/Hz<superscript>1/2</superscript> at 100 Hz with an 1/f corner frequency of 2 Hz, measured inside a magnetically-Shielded room. Demonstration of magnetocardiograph measurements showed quite promising results with high signal-to-noise ratio of 82 with a moderate magnetic shielding. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10518223
- Volume :
- 15
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Applied Superconductivity
- Publication Type :
- Academic Journal
- Accession number :
- 17399805
- Full Text :
- https://doi.org/10.1109/TASC.2005.849985