Demonstration of a switchable damping system to allow low-noise operation of high-Q low-mass suspension systems

Hennig, J.-S. et al. (2017) Demonstration of a switchable damping system to allow low-noise operation of high-Q low-mass suspension systems. Physical Review D, 96(12), 122005. (doi:10.1103/PhysRevD.96.122005)

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Abstract

Low-mass suspension systems with high- Q pendulum stages are used to enable quantum radiation pressure noise limited experiments. Utilizing multiple pendulum stages with vertical blade springs and materials with high-quality factors provides attenuation of seismic and thermal noise; however, damping of these high- Q pendulum systems in multiple degrees of freedom is essential for practical implementation. Viscous damping such as eddy-current damping can be employed, but it introduces displacement noise from force noise due to thermal fluctuations in the damping system. In this paper we demonstrate a passive damping system with adjustable damping strength as a solution for this problem that can be used for low-mass suspension systems without adding additional displacement noise in science mode. We show a reduction of the damping factor by a factor of 8 on a test suspension and provide a general optimization for this system.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Spencer, Mr Andrew and Pascucci, Daniela and Bell, Dr Angus and Hild, Professor Stefan and Barr, Dr Bryan and Sorazu Lucio, Dr Borja and Sinclair, Mr Martin and Leavey, Mr Sean and Wright, Ms Jennifer and Zhang, Mr Teng and Danilishin, Dr Stefan and Dupej, Mr Peter and Hennig, Mr Jan-Simon and Cunningham, Dr Liam and Steinlechner, Dr Sebastian and Hough, Professor James and Huttner, Dr Sabina and Strain, Professor Kenneth and Jones, Mr Russell
Authors: Hennig, J.-S., Barr, B. W., Bell, A. S., Cunningham, W., Danilishin, S. L., Dupej, P., Gräf, C., Hough, J., Huttner, S. H., Jones, R., Leavey, S. S., Pascucci, D., Sinclair, M., Sorazu, B., Spencer, A., Steinlechner, S., Strain, K. A., Wright, J., Zhang, T., and Hild, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN:1550-7998
ISSN (Online):1550-2368
Published Online:26 December 2017
Copyright Holders:Copyright © 2017 American Physical Society
First Published:First published in Physical Review D 96(12):122005
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
624341Investigations in Gravitational Radiation / Particle Astrophysics Capital equipmentSheila RowanScience & Technology Facilities Council (STFC)ST/L000946/1S&E P&A - PHYSICS & ASTRONOMY