Cryogenic nuclear gyroscope

Details Cryogenic nuclear gyroscope Cryogenic nuclear gyroscope

1978-11-07

1980-09-30

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a magnetometer

G01R 3308

Patent

active

042258189

ABSTRACT:
A cryogenic nuclear gyroscope comprises a cylinder of niobium cooled within a helium cryostat so as to be superconducting and to provide a trapped, substantially homogeneous magnetic field, a helium-3 sample contained within a spherical pyrex cell having nuclei possessing a net magnetic moment, coils provided to polarize the sample to provide that net magnetic moment, a SQUID magnetometer coupled to the sample by a pick-up coil of a transformer and frequency sensitive means coupled to the SQUID to detect changes in the precession of the nuclear moments of the sample caused by rotation of the gyroscope about an axis parallel to the direction of the homogeneous magnetic field. A superconducting lead shield isolates the helium-3 sample from external magnetic fields.

REFERENCES:
L. A. Noberly et al., Application of Squid Magnetometer to Nuclear Magnetic Thermometry, IEEE Transactions on Magnetics, vol. MAG-13, No. 1, Jan. 1977, pp. 358-360.
P. Hensel and D. T. Smith, A Pulsed Nuclear Magnetic Resonance Thermometer for use Below 100 mK, Cryogenics, Mar. 1974, vol. 14, No. 3, pp. 121-131.

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