Dead-zone free optically pumped M.sub.Z magnetometer

Details Dead-zone free optically pumped M.sub.Z magnetometer Dead-zone free optically pumped M.sub.Z magnetometer

1991-04-08

1993-07-13

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using optical pumping or sensing device

G01R 3326

Patent

active

052277224

ABSTRACT:
A gas cell, preferably in the shape of a hemi-sphere, forms a transparent enclosure for helium or an alkali metal vapour. A coil forms an A.C. magnetic field H.sub.1 in the enclosure, the magnetic field having multi-directional field lines. A lamp or lamps, comprising either helium or alkali metal vapour, direct circularly polarized resonance radiation at the enclosure such that the radiation rays travelling through the enclosure are multi-directional. A photodetector or photodetectors detect the radiation rays after they have passed through the gas cell. The multi-directionality of the radiation rays and the A.C. magnetic field H.sub.1 ensures that the magnetometer will not possess dead-zones.

REFERENCES:
patent: 3206671 (1962-04-01), Colegrove, Jr. et al.
patent: 3350632 (1967-10-01), Robinson
patent: 4327327 (1982-04-01), Greendwood et al.
patent: 4509014 (1985-04-01), Karwacki et al.
patent: 4544891 (1985-10-01), Karwacki
patent: 4567439 (1986-01-01), McGregor
patent: 4600886 (1986-07-01), Jensen
Rubidium Vapour Magnetometer, L. W. Parsons and Z. M. Wiatr, Journal of Scientific Instruments, vol. 39, pp. 292-300, Jun. 1962.
Principles of Operation of the Rubidium Vapor Magnetometer, A. L. Bloom, Applied Optics, vol. 1, p. 61, Jan. 1962.

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