SERF陀螺仪工作在无自旋交换弛豫(SERF)状态下,电子自旋和核子自旋强烈耦合。通过研究电子自旋与核子自旋的耦合方程,分析了泵浦激光的功率和气室温度对SERF陀螺仪磁场补偿的影响,并搭建了SERF陀螺仪实验平台系统进行验证。研究结果表明...SERF陀螺仪工作在无自旋交换弛豫(SERF)状态下,电子自旋和核子自旋强烈耦合。通过研究电子自旋与核子自旋的耦合方程,分析了泵浦激光的功率和气室温度对SERF陀螺仪磁场补偿的影响,并搭建了SERF陀螺仪实验平台系统进行验证。研究结果表明:原子核自旋补偿磁场正比于泵浦激光功率,泵浦激光功率在9.7 m W至105.6 m W的变化范围中,自旋补偿磁场的变化达到8.9 n T;气室温度在107.5℃至149.3℃变化范围中,自旋补偿磁场变化为4.5 n T,无明显的相关性,并且相对于气室温度的变化,补偿磁场对泵浦激光功率变化更加敏感。展开更多
Atomic spin gyroscope (ASG) based on comagnetometer is a high sensitive and compact gyroscope for future inertial navigation applications. The start-up time was several hours of the demonstrated ASGs based on 3He-K or...Atomic spin gyroscope (ASG) based on comagnetometer is a high sensitive and compact gyroscope for future inertial navigation applications. The start-up time was several hours of the demonstrated ASGs based on 3He-K or21 Ne-Rb-K comagnetometer, and only a few inertial navigation applications allow such a long time for preparation. We report the demonstration of an ASG based on 129Xe-Cs comagnetometer, which decreases the start-up time to 10 minutes and decreases the operation temperature by 40% as well. By operating this ASG in spin exchange relaxation free regime, a sensitivity of 7×10 -5 °/(s Hz1/2) was achieved.展开更多
文摘SERF陀螺仪工作在无自旋交换弛豫(SERF)状态下,电子自旋和核子自旋强烈耦合。通过研究电子自旋与核子自旋的耦合方程,分析了泵浦激光的功率和气室温度对SERF陀螺仪磁场补偿的影响,并搭建了SERF陀螺仪实验平台系统进行验证。研究结果表明:原子核自旋补偿磁场正比于泵浦激光功率,泵浦激光功率在9.7 m W至105.6 m W的变化范围中,自旋补偿磁场的变化达到8.9 n T;气室温度在107.5℃至149.3℃变化范围中,自旋补偿磁场变化为4.5 n T,无明显的相关性,并且相对于气室温度的变化,补偿磁场对泵浦激光功率变化更加敏感。
基金supported by the National Natural Science Foundation of China (60825305, 61121003)the National Basic Research Program of China (2009CB724002)the Defense Industrial Technology Development Program of China (B2120110002)
文摘Atomic spin gyroscope (ASG) based on comagnetometer is a high sensitive and compact gyroscope for future inertial navigation applications. The start-up time was several hours of the demonstrated ASGs based on 3He-K or21 Ne-Rb-K comagnetometer, and only a few inertial navigation applications allow such a long time for preparation. We report the demonstration of an ASG based on 129Xe-Cs comagnetometer, which decreases the start-up time to 10 minutes and decreases the operation temperature by 40% as well. By operating this ASG in spin exchange relaxation free regime, a sensitivity of 7×10 -5 °/(s Hz1/2) was achieved.
