Study on differential magnetic fields of nuclear magnetic resonance gyroscope

Abstract During the operation of NMRG, polarized alkali atoms will produce a magnetic field. Different noble gases feel different magnetic fields produced by polarized alkali atoms magnetic field, which will lead to extra bias drift of gyroscope output. Countering this phenomenon, the influence of differential magnetic field on gyroscope output is analyzed theoretically, and the method of calculating differential magnetic field is optimized. The effects of static magnetic field, working temperature, and different cell insufflation parameters on differential magnetic field are studied experimentally. The result shows that the static magnetic field intensity has no obvious effect on the differential magnetic field. There is a working temperature point that makes the differential magnetic field zero when the relaxation time of the two noble gases is the same, and the cell insufflation parameters influence the differential field by influencing the difference in relaxation time.