Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 29: Precision Measurements and Metrology III

Q 29.1: Talk

Wednesday, March 10, 2010, 14:00–14:15, A 310

Stabilising the distance of 10 m separated optical tables to 100 pm/sqrt(Hz) — •Katrin Dahl for the 10 m Prototype team — Max-Planck-Institut für Gravitationphysik (Albert-Einstein-Institut) und Institut für Gravitationsphysik, Leibniz Universität Hannover, Callinstr. 38, D-30167 Hannover

The AEI 10 m Prototype Interferometer will develop and test new techniques for the third generation of ground based interferometric gravitational-wave detectors. Furthermore, it provides an ultra-low displacement-noise environment which will be used for other experiments, e.g. related to GRACE follow-on or macroscopic quantum mechanics. To create such a quiet environment, seismically isolated optical tables separated by just above 10 m will be suspended in a large scale ultra-high vacuum system. The relative motion between these tables will be measured by a dedicated set of heterodyne Mach-Zehnder interferometers. With this setup the distance between the tables can then be stabilised via feedback to voice-coil actuators. In this talk we will present first measurements performed between two seismically non-isolated tables separated by about 10 m.