Development of a compact high-resolution absolute gravity gradiometer
based on atom interferometers
- URL: http://arxiv.org/abs/2202.12021v1
- Date: Thu, 24 Feb 2022 11:05:49 GMT
- Title: Development of a compact high-resolution absolute gravity gradiometer
based on atom interferometers
- Authors: Wei Lyu, Jia-Qi Zhong, Xiao-Wei Zhang, Wu Liu, Lei Zhu, Wei-Hao Xu, Xi
Chen, Biao Tang, Jin Wang, Ming-Sheng Zhan
- Abstract summary: We present a compact high-resolution gravity gradiometer based on dual Rb-85 atom interferometers.
A phase resolution of 104 murad is achieved, which corresponds to a gravity gradient resolution of 0.86 E.
- Score: 29.588678452286015
- License: http://creativecommons.org/licenses/by-nc-sa/4.0/
- Abstract: 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 {\mu}rad 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.
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