Abstract:Nuclear magnetic resonance gyroscope with small size, high precision, low power consumption and other significant advantages, is one of the main development directions of high-precision micro-miniature gyroscopes in the future. The polarization of the Xe nuclear spin in the atomic gas chamber is an important parameter to measure the performance of the atomic vapor cell, which directly affects the angular random travel of the gyroscope, and the accurate and rapid measurement of polarization is conducive to the development of better performance atomic vapor cell. In order to realize the rapid and in situ measurement of the polarization field of Xe in the nuclear magnetic resonance gyroscope (NMRG) of the Rb-Xe system, a method for measuring the polarization field of Xe by using the paramagnetic resonance frequency shift of Rb electrons is proposed. A simple formula for estimating the Xe polarization field is derived by exciting the magnetic field of Xe and flipping the Xe polarization field. The Xe polarization field on the order of 10nT is measured experimentally, and the results are consistent with the theoretical calculations. This method enables fast and efficient measurement of the polarization field of Xe in situ in NMRG.