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、^(129)Xe、^(131)Xe以及N_2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。
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,129 Xe,131 Xe and N 2,895nm 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.
作者
徐正一
彭欣欣
李连花
周尹敏
裘栩炀
周敏
徐信业
XU Zheng-yi;PENG Xin-xin;LI Lian-hua;ZHOU Yin-min;QIU Xu-yang;ZHOU Min;XUXin-ye(State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China)
出处
《导航定位与授时》
2019年第3期113-118,共6页
Navigation Positioning and Timing
基金
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)
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
Nuclear magnetic resonance gyroscope
Three dimensional atomicmagnetometer
Three dimensional magnetic field stabilization
Allan deviation
