Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1990-03-05
1991-09-17
Wieder, Kenneth A.
Electricity: measuring and testing
Magnetic
Magnetometers
505846, 427 62, 427 35, 336 84M, 336DIG1, G01R 33035
Patent
active
050498185
ABSTRACT:
A superconducting gradiometer for measuring weak magnetic fields for a measuring device comprising a SQUID (Superconductive Quantum Interference Devices), a gradiometer coil, a coupling coil, a cryosystem and a signal processing device, in which the well-defined gradient of a magnetic field to be measured is detected by means of the gradiometer. A coil of the gradiometer is made of superconducting wire, arranged about a carrier body in axial and circumferential grooves cut in the carrier body, the grooves being coated with a superconducting thin film. The thin film in the circumferential grooves is interrupted by slots. The wire in the respective circumferential grooves comprises loops wound in opposing directions connected by a twisted pair of connecting leads secured in the axial groove.
REFERENCES:
patent: 4280095 (1981-07-01), Hinton
patent: 4437064 (1984-03-01), Overton, Jr. et al.
patent: 4523147 (1985-06-01), D'Angelo et al.
John Clarke, "Principles and Applications of SQUIDs", Proceedings of the IEEE, vol. 77, No. 8, Aug. 1989, pp. 1208-1223.
Dossel Olaf
Edeler Wilfried
Edmonds Warren S.
Squire William
U.S. Philips Corporation
Wieder Kenneth A.
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