Magnetometer

Details Magnetometer Magnetometer

1976-09-24

1993-02-23

Blum, Theodore M.

Electricity: measuring and testing

Particle precession resonance

Using optical pumping or sensing device

324301, 102417, G01V 300

Patent

active

051893681

ABSTRACT:
A magnetometer is desclosed in which a gas cell containing atomic vapor is pulse pumped at one of the transitions of the gas in the cell. After the pulse has passed through the gas cell, thereby causing alignment of all the individual atomic moments along the propagation direction of the pulse, a probe beam reads out the Larmor precession frequency of the freely precessing atoms in terms of the frequency of the amplitude modulation of the probe beam caused by the free precession within the gas cell. The system is suitable for laboratory measurements of the absolute value of a magnetic field and for packaging in an expendable battery powered water-born buoy becuase of the low power consumption of the subject system.

REFERENCES:
patent: 3129410 (1964-04-01), Sorokin
patent: 3500176 (1970-03-01), Kastler et al.
patent: 3526002 (1970-08-01), Waddel
patent: 3750008 (1973-07-01), Asano
Monitor Developed for Nitric Oxide Pollution, Nat. Bur. of Stand. Tech. News Bull. (U.S.A.) vol. 56, No. 9, Sep. 1972, p. 221.

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