Study of the Effect of an External Magnetic Field on the Accuracy of NMRG

Abstract

A theoretical model of nuclear magnetic resonance gyroscope (NMRG) has been established in this paper by the double noble gases in closed loop. The effect on the accuracy of NMRG by the external static magnetic field was analyzed. The fluctuation of the static magnetic field causes measurement error in the Earth’s rotary rate experiment. The atoms sense a constant magnetic field, when the fluctuation of the static magnetic field is compensated by the closed loop system. The results show that the Earth’s rotary rate measurement error decreases from 13.58 to 0.22°/h, which means 62 times, when the static magnetic field is compensated in closed loop. The fluctuation of the static magnetic field in the magnetic shield decreases 571 times. A higher accuracy of the NMRG is achieved when the fluctuation of the static magnetic field is effectively suppressed by the closed loop.