Cryogenic magnetic probe having new substrate

Details Cryogenic magnetic probe having new substrate Cryogenic magnetic probe having new substrate

1984-04-03

1986-09-23

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

324247, 324260, 324301, 33367, 336208, G01R 33035, G01R 33022, G01R 3324

Patent

active

046138161

ABSTRACT:
A magnetic probe for detecting the location of a magnetic anomaly. The probe includes an outer dewar jacket that defines a chamber maintained at cryogenic temperatures by a helium reservoir. Mounted on the reservoir in the chamber is a substrate which supports a plurality of pairs of gradiometer coils and a magnetometer. A plurality of SQUIDs detect the magnetic fields sensed by the magnetometer and the pairs of gradiometer coils to determine the magnetic field intensities, directions and gradients from which can be determined location, speed and direction of the anomaly. A valving network connecting the reservoir to a vent allows the probe to be operated in any orientation around its horizontal axis.

REFERENCES:
patent: 3435337 (1969-03-01), Inouye et al.
patent: 3470461 (1969-09-01), Morse
patent: 4253079 (1981-02-01), Brosch
patent: 4494100 (1985-01-01), Stengel et al.
Wynn et al, "Advanced Superconducting Gradiometers/Magnetometer Arrays . . . ", IEEE Trans. on Magnetics, vol. Mag-11, No. 2, Mar. 1975, pp. 701-707.
Zimmerman et al, "Ultrasensitive Superconducting Magnetic Gradiometer", NBS Report, Mar. 31, 1972, pp. 31-36.
Barbanera et al, "A Gradiometer for the Study . . . ", The Institute of Physics, Apr. 1978, pp. 297-298.
Postnikov et al, "An Apparatus for Measuring the Process . . . ", Cryogenics, vol. 19, No. 2, Feb. 1979, pp. 116-118.
Ishizuka et al, "A SQUID Magnetometer for Simultaneous Measurements . . . ", Jap. Jorunal of Applied. Phys., vol. 19, No. 4, Apr. 1980, pp. 639-646.
Pelizzone et al, "A SQUID Susceptometer . . . ", Appl. Physic., vol. 24, No. 4, Apr. 1981, pp. 375-379.

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