Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2001-10-02
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
Amaldi 4 (Perth 2001) conference proceedings, 10 pages, 8 figures
Scientific paper
10.1088/0264-9381/19/7/322
Using one arm of the Michelson interferometer and the power recycling mirror of the interferometric gravitational wave detector GEO600, we created a Fabry-Perot cavity with a length of 1200 m. The main purpose of this experiment was to gather first experience with the main optics, its suspensions and the corresponding control systems. The residual displacement of a main mirror is about 150 nm rms. By stabilising the length of the 1200 m long cavity to the pre-stabilised laser beam we achieved an error point frequency noise of 0.1 mHz/sqrt(Hz) at 100 Hz Fourier frequency. In addition we demonstrated the reliable performance of all included subsystems by several 10-hour-periods of continuous stable operation. Thus the full frequency stabilisation scheme for GEO600 was successfully tested.
Casey Martin
Danzmann Karsten
Freise Andreas
Gossler Stefan
Grote Hartmut
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