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New Design of Electrostatic Mirror Actuators for Application in High-Precision Interferometry

MPG-Autoren
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Wittel,  H.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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

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

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

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Strain,  K. A.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Zitation

Wittel, H., Hild, S., Bergmann, G., Danzmann, K., & Strain, K. A. (2015). New Design of Electrostatic Mirror Actuators for Application in High-Precision Interferometry. Classical and quantum gravity, 32(17): 175021. doi:10.1088/0264-9381/32/17/175021.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0028-9F1A-2
Zusammenfassung
We describe a new geometry for electrostatic actuators to be used in sensitive laser interferometers. The arrangement consists of two plates at the sides of the mirror (test mass), and therefore does not reduce its clear aperture as a conventional electrostatic drive (ESD) would do. Using the sample case of the AEI-10m prototype interferometer, we investigate the actuation range and influences of relative misalignment of the ESD plates in respect to the test mass. We find that in the case of the AEI-10 m prototype interferometer, this new kind of ESD could provide a range of 0.28 micrometer when operated at a voltage of 1 kV. In addition, the geometry presented is shown to provide a reduction factor of about 100 in the magnitude of actuator motion coupling to test mass displacement. We show that therefore in the specific case of the AEI-10m interferometer it is possible to mount the ESD actuators directly on the optical table, without spoiling the seismic isolation performance of the triple stage suspension of the main test masses.