论文标题
基于原子干涉仪的紧凑高分辨率绝对重力梯度计的开发
Development of a compact high-resolution absolute gravity gradiometer based on atom interferometers
论文作者
论文摘要
我们使用刺激的拉曼过渡基于双RB-85原子干涉仪，提出一个紧凑的高分辨率重力疗法仪。基线L = 44.5 cm和询问时间t = 130 ms的传感器头部的体积小于100升。实验参数被优化以提高短期敏感性，而依靠拉曼波矢量反转的排斥算法则可以提高长期稳定性。平均时间为17000 s后，达到了104μRAD的相位分辨率，对应于重力梯度分辨率为0.86 E.据我们所知，这是截至迄今为止紧凑的最高水平。在评估和纠正光转移，残留的zeeman偏移，科里奥利效应和自动效应的系统误差之后，该仪器用作绝对重力梯度计，因此，将局部重力梯度测量为3114（53）E。
We present a compact high-resolution gravity gradiometer based on dual Rb-85 atom interferometers using stimulated Raman transitions. A baseline L=44.5 cm and an interrogation time T=130 ms are realized in a sensor head with volume of less than 100 liters. Experimental parameters are optimized to improve the short-term sensitivity while a rejection algorithm relying on inversion of the Raman wave vector is implemented to improve the long-term stability. After an averaging time of 17000 s, a phase resolution of 104 μrad is achieved, which corresponds to a gravity gradient resolution of 0.86 E. As far as we know, this is the sub-E atom gravity gradiometer with the highest level of compactness to date. After the evaluation and correction of system errors induced by light shift, residual Zeeman shift, Coriolis effect and self-attraction effect, the instrument serves as an absolute gravity gradiometer and with it the local gravity gradient is measured to be 3114 (53) E.
