An optically pumped magnetic sensor with submilligamma resolution

A free-precession magnetic detector (FPMD) has been developed using the atomic spin resonance of potassium vapor. In order to maximize sensitivity and minimize motion effects, this sensor separates the observation and spin-alignment functions in the spin resonance experiment. The FPMD exhibits a noi...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1989-09, Vol.25 (5), p.3408-3410
Main Authors: Avrin, W.F., Sager, R.E.
Format: Article
Language:English
Subjects:
Atom optics
Detectors
Magnetic resonance
Magnetic sensors
Magnetic separation
Noise level
Noise reduction
Optical noise
Optical pumping
Optical sensors
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Summary:A free-precession magnetic detector (FPMD) has been developed using the atomic spin resonance of potassium vapor. In order to maximize sensitivity and minimize motion effects, this sensor separates the observation and spin-alignment functions in the spin resonance experiment. The FPMD exhibits a noise level of 6*10/sup -13/ T with one second of data averaging. The initial experiments suggest ways of reducing this noise to approximately 10/sup -14/ T.< >
ISSN:0018-9464
1941-0069
DOI:10.1109/20.42317