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Towards measuring the off-resonant thermal noise of a pendulum mirror

MPS-Authors

Ribichini,  Luciano
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

Kloevekorn,  P.
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Willke,  Benno
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Lück,  Harald
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Danzmann,  Karsten
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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(Publisher version), 91KB

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Citation

Leonhardt, V., Ribichini, L., Kloevekorn, P., Willke, B., Lück, H., & Danzmann, K. (2002). Towards measuring the off-resonant thermal noise of a pendulum mirror. Classical and Quantum Gravity, 19(7), 1717-1721. doi:10.1088/0264-9381/19/7/366.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-53B0-A
Abstract
Thermal noise is one of the dominant noise sources in interferometric length measurements and can limit the sensitivity of gravitational wave detectors. Our goal is to analyse the off-resonant thermal noise of a high Q pendulum. Therefore we interferometrically detect the length changes of a 2.3 cm long optical resonator, which for good seismic isolation consists of two multiple stage pendulums. We are able to lock the length of this optical resonator to a frequency-stabilized laser beam and as a result get the spectral density of the differential mirror movement.