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Q: Quantenoptik
Q 21: Poster: Optical Applications
Q 21.3: Poster
Thursday, April 5, 2001, 12:30–15:00, AT2
Vibration isolation of optical components in the British-German gravitational wave detector GEO 600 — •Karsten Kötter1, Stefan Gossler1, Karsten Danzmann1,2, and the GEO600 team1,2 — 1Institut für Atom- und Molekülphysik, Abteilung Spektroskopie, Callinstr. 38, 30167 Hannover — 2Max-Planck-Institut für Quantenoptik, Außenstelle Hannover, Callinstr. 38, 30167 Hannover
A substantial challenge in operating an interferometric gravitational wave detector is the vibration isolation of the optical components. The British-German gravitational wave detector GEO 600, the construction of which is almost complete, is using a system of passive and active vibration isolation.
The passive isolation stage consists of cascaded low-dissipation pendulum stages which are electronically damped on their resonance frequencies.
The active isolation stage uses motion sensors and 3-dimensional-piezo-actuators to detect and reduce vibrations with low Fourier frequencies (<20 Hz) by applying feedback and feedforward control.
We will show the setup and the overall performance of the vibration isolation system.