München 2019 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 14: Poster Session (posters are permanently on display)

GR 14.14: Poster

Thursday, March 21, 2019, 16:30–18:30, HS 6

Mirror suspensions to reduce seismic noise of the AEI 10m prototype interferometer — •Johannes Lehmann — Albert Einstein Institute for Gravitational Physics, Hannover

The coupling of unwanted ground motion to interferometer test masses is reduced by suspending them. In order to control the suspended mirrors without feeding back ground motion in the process, special actuators are needed.

A new design for an electrostatic drive has been tested on the triple cascaded-pendulum suspensions used as part of the AEI 10m prototype interferometer. This interferometer is planned to reach and surpass the standard quantum limit, which limits the sensitivity of gravitational wave interferometers employing classical laser light.

This poster will present a preliminary experiment where one interferometer arm was set up to act as a testbed for suspensions, control schemes and actuators, and to measure the performance of the pre-isolation system and laser stabilisation.