非共鳴高周波磁場による光ポンピング磁力計の誤差

概要

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Behavior of the optically pumped atoms in a static magnetic field and a nonresonant rf field is analized in terms of the macroscopic magnetization. Theory predicts that the atomic g-factor is modified by the nonresonant rf field, and hence the output frequency of the optically pumped magnetometer shifts by this field. Theoretical predictions are verified by the experiment with a self-oscillating magnetometer with cesium vapor. It is found that this kind of error can be neglected for the measurement of the geomagnetic field on the earth with a magnetometer whose precision is about 1 gamma, but it becomes important when the precision is improved to be less than 10^<-2> gamma. Moreover this kind of error should be taken into account when the magnetic field is measured at the altitude higher than 104 km, or when the magnetometer and a high power rf transmitter are on board the same space vehicle
宇宙航空研究開発機構の論文