| 摘要: |
| 核磁共振陀螺仪内部空间的三维磁场锁定作为关键技术之一，对于核磁共振陀螺仪的角度随机游走及零偏稳定性具有较大的优化作用。实验装置选用充有CS、129Xe、131Xe以及N2的方形原子气室，选择895nm圆偏振光作为泵浦光，852nm线偏振光作为探测光，通过对纵向磁场进行调制，实现了三维原子磁力计。通过提升气室温度对纵向磁场的锁定效果进行优化后，在3个方向的磁场起伏范围均稳定至7nT(5000 s)以下，锁定后磁场的千秒稳定性比锁定前提升至少1个量级。 |
| 关键词: 核磁共振陀螺仪 三维原子磁力计 三维磁场锁定 阿伦方差 |
| DOI： |
|
| 基金项目:国家重点研究发展规划（973计划）（2016YFA0302103，2017YFF0212003，2016YFB0501601）；国家高技术研究发展计划（863计划）（2014AA123401）；国家自然科学基金重点项目（11134003）；上海市优秀带头人计划（12XD1402400） |
|
| Preliminary Stabilization of Three Dimensional Magnetic Fields in a Nuclear Magnetic Resonance Gyroscope |
| XU Zheng-yi,PENG Xin-xin,LI Lian-hua,ZHOU Yin-min,QIU Xu-yang,ZHOU Min,XU Xin-ye |
| (State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China) |
| Abstract: |
| The stabilization of three-dimensional magnetic field of nuclear magnetic resonance gyroscope (NMRG), as one of the key technologies of NMRG, plays an important role in optimizing angle random walk and bias instability. The experimental device utilizes a cube-shaped cell filled with CS, 129Xe, 131Xe and N2, 895nm circularly polarized pump beam and 852nm linearly polarized probe beam for the three-axis atomic magnetometer, employing longitudinal magnetic field modulation. The magnetic fluctuation in three axes of less than 7nT (5000s) is achieved after the optimization of the cell temperature, which shows an improvement of about one order in long-term instability than the unlocked condition. |
| Key words: Nuclear magnetic resonance gyroscope Three dimensional atomic magnetometer Three dimensional magnetic field stabilization Allan deviation |
