Wu Bin, Zhu Dong, Cheng Bing, Wu Liming, Wang Kainan, Wang Zhaoying, Shu Qing, Li Rui, Wang Helin, Wang Xiaolong, Lin Qiang
Opt Express. 2019 Apr 15;27(8):11252-11263. doi: 10.1364/OE.27.011252.
The cold atom absolute gravimeters are intrinsically sensitive to its orientation due to the Coriolis effect, which should be understood clearly and compensated for field applications. The sensitivity on the orientation for a free-fall atom gravimeter is investigated in this paper. The apparatus is simplified and improved a lot such that fast adjustment and measurement could be carried out within 20 minutes. From the experimental results, it is found that the orientation angle has a dominant influence on the absolute gravity measurement, especially when the horizontal velocity of atoms is non-negligible. Besides, the magnitude and direction of average horizontal velocity of the detected atoms are obtained in this experiment. In particular, the direction of East-West has been measured by the atom gravimeter itself, such that gravity bias arising from Coriolis effect is estimated precisely.
由于科里奥利效应，冷原子绝对重力仪对其取向具有内在敏感性，在实际应用中需要清楚理解并进行补偿。本文研究了自由落体原子重力仪对取向的敏感性。对实验装置进行了大幅简化和改进，以便能在20分钟内完成快速调整和测量。从实验结果发现，取向角对绝对重力测量有显著影响，特别是当原子的水平速度不可忽略时。此外，本实验还获得了被检测原子平均水平速度的大小和方向。特别地，利用原子重力仪自身测量了东西方向，从而精确估计了科里奥利效应引起的重力偏差。
