Nuclear magnetic resonance magnetometer

Details Nuclear magnetic resonance magnetometer Nuclear magnetic resonance magnetometer

1988-06-10

1990-01-02

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a magnetometer

G01R 3324

Patent

active

048915920

ABSTRACT:
A nuclear magnetic resonance magnetometer is provided comprising two semi-coils which pick up precessional signals of the nuclear spins of two samples. A capacitor of a battery of capacitors forms a resonating circuit with the two semi-coils. The signal at the terminals of the capacitor is amplified in a differential amplifier, phase-shifted in a phase-shifter introducing a constant phase-shift of 90.degree., and reinjected into the semi-coils through a potentiometer. The frequency of the oscillations is measured by a frequency meter. A circuit controls the connection of the capacitors of the battery is response to the valve of the frequency measured so as to maintain the parasite phase-shifts between signals picked up and reinjected signals less than a threshold.

REFERENCES:
patent: 3145336 (1964-08-01), Bonnet
patent: 3239752 (1966-03-01), Greenwood, Jr.
patent: 3735246 (1973-05-01), Glenat et al.
patent: 4734645 (1988-03-01), Glenat et al.
Kurashov, Sadydov and Tarasov, "A Follow-Up Magnetometer Based on An E11-2 Magnetic Field Meter", 8164 Instruments and Experimental Techniques, vol. 18, No. 4, part 2 (Jul. 8, 1973): 1306, 1308.

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