A hybrid SQUID gradiometer with 3-dimensional thin-film pick-up coils fabricated using an excimer laser
- 1 January 1994
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Electron Device Letters
- Vol. 15 (1) , 19-21
- https://doi.org/10.1109/55.289475
Abstract
A compact hybrid superconducting quantum interference device (SQUID) gradiometer consisting of a coaxial pick-up coil with a superconducting Nb thin-film and a square double-washer dc-SQUID is developed. To make the pick-up coils, a 3-dimensional thin-film patterning technique is developed using an excimer laser. The gradiometer operates with flux locked loop electronics, a low-noise amplifier, and a high-speed (1 MHz) phase-sensitive detector. This gradiometer is sensitive to levels as low as 9 fT//spl radic/Hz.<>Keywords
This publication has 6 references indexed in Scilit:
- Whole cortex, 64 channel SQUID biomagnetometer systemIEEE Transactions on Applied Superconductivity, 1993
- An electronic second-order gradiometer for biomagnetic applications in clinical shielded roomsIEEE Transactions on Applied Superconductivity, 1993
- Proximity effects in superconducting wire bondingIEEE Transactions on Applied Superconductivity, 1993
- Design and fabrication of multichannel DC SQUIDs for biomagnetic applicationsIEEE Transactions on Applied Superconductivity, 1993
- Multichannel DC SQUID sensor array for biomagnetic applicationsIEEE Transactions on Magnetics, 1991
- An integrated DC SQUID gradiometer for biomagnetic applicationIEEE Transactions on Magnetics, 1989