SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 59: Poster IV
Q 59.10: Poster
Thursday, March 9, 2023, 16:30–19:00, Empore Lichthof
The Very Long Baseline Atom Interferometry facility for high precision gravity measurement — •Ali Lezeik1, Mario Montero1, Constantin Stojkovic1, Klaus H. Zipfel1, Dorothee Tell1, Vishu Gupta1, Henning Albers1, Sebastian Bode1, Jonas Klussmeyer1, Ernst M. Rasel1, Christian Schubert1,2, and Dennis Schlippert1 — 1Leibniz Universität Hannover, Institut für Quantenoptik — 2Deutsches Zentrum für Luft und Raumfahrt, Institut für Satellitengeodäsie und Inertialsensorik
The 15m high Very Long Baseline Atom Interferometry (VLBAI) facility aims for sub nm/s2 gravity measurement sensitivities. Using light-pulse atom interferometry, the VLBAI facility enables to perform accurate measurements of inertial effects thus making it a useful device for metrology and tests of fundamental physics. The sensitivity of light-pulse atom interferometers depends on several factors one of which being the freefall time. A second-long free fall of the atoms allows to reach acceleration sensitivities of 1nm/s2, comparable to the best classical superconducting gravimeters. At the VLBAI facility, a freefall time of 2.8s can be reached. In addition, excellent control over the environment and a large atomic flux is necessary to reduce systematic effects and achieve shot-noise limited sensitivities.
We present the current status of the VLBAI facility and outline its distinguishing aspects that will include sources of ultracold ytterbium and rubidium, a 10m long UHV baseline magnetically shielded to below 1.5nT/m, and a inertial reference seismic attentuation system.