Description
Title: High-precision atom interferometer GAIN
Authors: B. Leykauf, H.Thaivalappil Sunilkumar, V. Schkolnik, and A. Peters
The atom interferometer GAIN uses interfering ensembles of laser-cooled Rb-87 atoms in a fountain setup to precisely and accurately measure local gravity. Our instrument’s performance was compared to falling corner-cube and superconducting gravimeters during several measurement campaigns at geodetic observatories, demonstrating sensitivities better than 100 nm/s²/√Hz, long-term stability better than 1 nm/s² and an accuracy comparable with the best classical instruments.
Beyond its capabilities as a gravimeter, we will present the results of a test of the Continuous Spontaneous Localization (CSL) collapse model we recently performed. Furthermore, we will report on improvements implemented into the apparatus, including a new modularized laser system and FPGA-based laser stabilization.
