摘要
核磁共振陀螺通过处于磁共振态的原子核进动频率在惯性系下的不变性实现载体角速度的敏感测量。为实现高灵敏度的核自旋磁矩测量,通常基于核磁共振陀螺气室构建原位参量调制磁强计,因此内嵌碱金属参量调制磁强计性能直接影响陀螺仪指标。开展核磁共振陀螺内嵌参量调制磁强计特性研究,分析了原子磁矩测量误差及其对陀螺性能的影响,并建立理论模型,仿真结果表明,泵浦光频率波动控制在1 GHz以内,探测光频率波动控制在0.1 GHz以内,可有效提高磁强计信噪比。研究结果对于提高碱金属磁强计灵敏度和信噪比、抑制核自旋磁矩测量误差具有理论指导意义。
The nuclear magnetic resonance gyro realizes the sensitive measurement of the angular velocity of the carrier through the invariance of the precession frequency of the nuclear nucleus in the magnetic resonance state in the inertial frame.In order to measure the magnetic moment of nuclear spin with high sensitivity,the in-situ parametric modulation magnetometer is usually constructed based on the vapor cell of the nuclear magnetic resonance gyro.Therefore,the performance of the parametric modulation magnetometer directly affects the parameters of the gyroscope.The performance of in-situ parametric modulated magnetometer in nuclear magnetic resonance gyro is studied.The measurement errors of atomic magnetic moment and their effects on gyro performance are analyzed and a theoretical model is established.The simulation results show that the signal to noise ratio of magnetometer can be effectively improved if the frequency fluctuation of pump light is controlled within 1 GHz and the frequency fluctuation of probe light is controlled within 0.1 GHz.The results can be used for improving the sensitivity and signal-to-noise ratio of alkali metal magnetometer and suppressing the measurement error of nuclear magnetic moment.
作者
黄伟
范晓婷
刘运全
刘院省
HUANG Wei;FAN Xiaoting;LIU Yunquan;LIU Yuanxing(Quantum Engineering Research Center,China Aerospace Science and Technology Corporation,Beijing 100094,China;Beijing Institute of Aerospace Control Devices,Beijing 100854,China;School of Physics,Peking University,Beijing 100871,China)
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2023年第1期72-79,共8页
Journal of Chinese Inertial Technology
基金
科工局稳定支持项目(969994304)。
关键词
核磁共振陀螺
原位参量调制磁强计
核自旋磁矩
误差抑制
nuclear magnetic resonance gyroscope
in-situ parametric modulation magnetometer
magnetic moment of nuclear spin
error suppression
作者简介
黄伟(1989—),男,高级工程师,从事核磁共振陀螺仪研究。E-mail:davy_h@yeah.net。
