Speaker
Description
An absolute atomic gravimeter and gradiometer based on atom interferometry have emerged as powerful tools for measuring the mass distribution beneath the Earth's surface. The spatial and temporal variations in gravity can be measured precisely with quantum gravimeters and gradiometers. These precise gravity measurements provide valuable information for geosciences, including geophysics, hydrology, volcanology, and underground resource exploration.
We report on the development of a quantum gravimeter and gradiometer based on an atom interferometer for field applications. The uncertainty of the gravimeter, based on Rb atoms, is estimated to be below 30 nm/s², primarily limited by wavefront distortion effects. To improve the uncertainty to below 10 nm/s², we are developing a Cs gravimeter of the atomic fountain type. Furthermore, to enable precise gravity measurements, we are developing a gravity gradiometer that consists of two identical gravimeters installed in one system.
In the presentation, we will discuss the uncertainty evaluation of the Rb gravimeter and introduce recent progress in the development of the Cs atomic fountain gravimeter and the Rb gradiometer
