The influence of transverse motion within an atomic gravimeter
The influence of transverse motion within an atomic gravimeter
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DOI：
10.1088/1367-2630/13/6/065025
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发表时间：
2011-06-28
影响因子：
3.3
通讯作者：
Dos Santos, Franck Pereira
中科院分区：
文献类型：
--
作者：
Louchet-Chauvet, Anne;Farah, Tristan;Dos Santos, Franck Pereira
研究了第二代冷原子重力仪长期稳定性和精度的极限。我们展示了一种基于四种交错测量配置的测量协议，该协议允许拒绝大多数系统影响，但不包括与科里奥利加速度和波前失真相关的影响。两者都与原子云的横向运动有关。对地球自转矢量方向进行相反方向的测量，使我们能够分离影响并修正科里奥利位移。最后，给出了不同原子温度下的测量结果，并进行了分析。特别是，我们指出了将这些测量外推到零温度的困难，这是为了校正由于波前失真而引起的偏差所必需的。
Limits on the long-term stability and accuracy of a second generation cold atom gravimeter are investigated. We demonstrate a measurement protocol based on four interleaved measurement configurations, which allows rejection of most of the systematic effects, but not those related to Coriolis acceleration and wave-front distortions. Both are related to the transverse motion of the atomic cloud. Carrying out measurements with opposite orientations with respect to the Earth's rotation vector direction allows us to separate the effects and correct for the Coriolis shift. Finally, measurements at different atomic temperatures are presented and analyzed. In particular, we show the difficulty of extrapolating these measurements to zero temperature, which is required in order to correct for the bias due to wave-front distortions.