nuclear-precession magnetometer

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A magnetometer based on the ability of protons to precess about the geomagnetic field with a frequency dependent on the strength of the ambient magnetic field. A strong field is applied which aligns the protons, and they then precess about the geomagnetic field after the applied field is removed. The instrument has a sensitivity of the order of 1 nT, and is capable of rapid repetition to produce an almost continuous signal.

Subjects: Earth Sciences and Geography.

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