Extremely sensitive super conducting quantum interference device

Details Extremely sensitive super conducting quantum interference device Extremely sensitive super conducting quantum interference device

1979-03-22

1981-07-21

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

29599, 357 5, G01R 33035, H01L 3922

Patent

active

042800951

ABSTRACT:
The instant invention increases the sensitivity of Josephson Junction Cryogenic Magnetometers by the use of stacked SQUID arrays. The SQUID sensitivity at each sensing point is increased by making an intimate, co-axial superposition of two or more two-junction DC SQUID loops, using evaporated thin-film technology although fabrication is not limited to this technology. The device permits multiple use of the SQUID loop area, thereby increasing the sensing volume and improving the coupling to the ambient magnetic field.

REFERENCES:
patent: 3259844 (1966-07-01), Casimir
patent: 3504283 (1970-03-01), Meservey
patent: 3528005 (1970-09-01), Morse et al.
patent: 3549991 (1970-12-01), Silver et al.
patent: 3956690 (1976-05-01), Rorden
patent: 3965411 (1976-06-01), Hesterman
Harris et al., "Superconducting Microcircuitry--Using Ion Implantation", Tech. Discl. Bull., vol. 17, No. 1, Jun. 1974, pp. 257, 258.
Harris et al., "Production of Weak Links--by Ion Implantation", IBM Tech. Discl. Bull., vol. 17, No. 9, Feb. 1975, pp. 2793, 2794.

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