New design of electrostatic mirror actuators for application in high-precision interferometry

Wittel, H., Hild, S. , Bergmann, G., Danzmann, K. and Strain, K. (2015) New design of electrostatic mirror actuators for application in high-precision interferometry. Classical and Quantum Gravity, 32(17), (doi: 10.1088/0264-9381/32/17/175021)

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We describe a new geometry for electrostatic actuators to be used in sensitive laser interferometers, suited for prototype and table top experiments related to gravitational wave detection with mirrors of 100 g or less. 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-10 m prototype interferometer, we investigate the actuation range and the influence of the relative misalignment of the ESD plates with 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 μm 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 the actuator motion coupling to the test mass displacement. We show that therefore in the specific case of the AEI-10 m 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.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Strain, Professor Kenneth and Hild, Professor Stefan
Authors: Wittel, H., Hild, S., Bergmann, G., Danzmann, K., and Strain, K.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Classical and Quantum Gravity
Publisher:Institute of Physics
ISSN (Online):1361-6382
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Classical and Quantum Gravity 32(17):175021
Publisher Policy:Reproduced under a Creative Commons License
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
624341Investigations in Gravitational Radiation / Particle Astrophysics Capital equipmentSheila RowanScience & Technologies Facilities Council (STFC)ST/L000946/1S&E P&A - PHYSICS & ASTRONOMY