Sensitive absolute-gravity gradiometry using atom interferometry
Sensitive absolute-gravity gradiometry using atom interferometry
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DOI：
10.1103/physreva.65.033608
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发表时间：
2002-03-01
影响因子：
2.9
通讯作者：
Kasevich, MA
中科院分区：
文献类型：
--
作者：
McGuirk, JM;Foster, GT;Kasevich, MA
我们报告了一个基于光脉冲原子干涉技术的灵敏绝对重力梯度仪的演示。该梯度计由两个绝对加速度计组成，以差分模式工作。我们报告了4 × 10（-9）g/Hz（1/2）的差动加速度灵敏度和小于10（-9）g的推断差动加速度精度。这相当于重力梯度灵敏度为4 E/Hz（1/2）（1 E =10（-9）s（-2）），加速度计之间间隔10米时的精度优于1 E。我们证明，该仪器可用于检测附近的质量在振动噪声环境和表征仪器灵敏度虚假加速度和旋转噪声。
We report the demonstration of a sensitive absolute-gravity gradiometer based on light-pulse atom-interference techniques. The gradiometer consists of two absolute accelerometers operated in a differential mode. We report a differential acceleration sensitivity of 4x10(-9) g/Hz(1/2) and an inferred differential acceleration accuracy of less than 10(-9) g. This corresponds to a gravity-gradient sensitivity of 4E/Hz(1/2) (1E =10(-9) s(-2)) and an accuracy of better than 1E for a 10-m separation between accelerometers. We demonstrate that the instrument can be used to detect nearby masses in a vibrationally noisy environment and characterize instrument sensitivity to spurious acceleration and rotation noise.