Title :
An optically pumped magnetic sensor with submilligamma resolution
Author :
Avrin, William F. ; Sager, Ronald E.
Author_Institution :
Quantum Magnetics Inc., San Diego, CA, USA
fDate :
9/1/1989 12:00:00 AM
Abstract :
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 6×10-13 T with one second of data averaging. The initial experiments suggest ways of reducing this noise to approximately 10-14 T
Keywords :
atomic beam magnetic resonance; magnetic field measurement; nonelectric sensing devices; optical pumping; potassium; FPMD; K vapour; atomic spin resonance; free-precession magnetic detector; noise level; optically pumped magnetic sensor; sensitivity; spin-alignment functions; submilligamma resolution; Atom optics; Detectors; Magnetic resonance; Magnetic sensors; Magnetic separation; Noise level; Noise reduction; Optical noise; Optical pumping; Optical sensors;
Journal_Title :
Magnetics, IEEE Transactions on
