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Title: Towards precision gravimetry using light-pulse atom interferometry
Author: Heffer, J. S.
ISNI:       0000 0004 7428 4376
Awarding Body: University of Liverpool
Current Institution: University of Liverpool
Date of Award: 2017
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A light-pulse atom interferometer for inertial sensing applications such as gravimetry is being commissioned, where the prototype has a target relative precision (σ g /g) of one part per million to enable geophysics applications, which is three orders of magnitude less sensitive than commercial optical gravimeters, but with the potential to exceed these. As part of this, a rubidium-85 magneto-optical trap was upgraded using optical amplification and fibre optics to capture an atom population number of O(10 8 ) and sub-Doppler cooling techniques have been used to reach ultracold temperatures of 20 μK. Several interferometer subsystems have been developed, including extensive optical systems featuring a high-specification optical modulator and laser-induced fluorescence detection. Preliminary investigations into the coherent manipulation of atomic states have been implemented and the resonance peak of a stimulated Raman transition has been observed.
Supervisor: Coleman, Jon ; Bowcock, Themis Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral