MAGNETOMETER
A magnetometer ls described, partlcularly to a device which accurately indicates the polarity and intensity of a magnetlc field. The main feature of the invention is a unique probe construction in combinatlon wlth a magnetic fleld detector system. The probe comprises two coils connected in series opposition for energization with an a-c voltage. The voltage lnduced in a third coll on the probe, a pick-up coil, is distorted by the presence of an external field to produce even harmonic voltages. A controlled d-c current is passed through the energized coils to counter the dlstortlon and reduce tbe even harmonic content to a null. When the null point is reached, the d-c current is a measure of the external magnetic field strength, and the phase of the pickup coil voltage indicates tbe field polarlty.
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-13-008410
- Assignee:
- U.S. Atomic Energy Commission
- Patent Number(s):
- US 2861242
- OSTI ID:
- 4282090
- Country of Publication:
- United States
- Language:
- English
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