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A low-frequency torsion pendulum with interferometric readout

Ross, M P; Venkateswara, Krishna Yethadka; Hagedorn, C. A.; Leupold, C. J.; Forsyth, Perry; Wegner, J. D.; Shaw, E. A.; Lee, J. G.; Gundlach, J. H.


We describe a torsion pendulum with a large mass-quadrupole moment and a resonant frequency of 2.8 mHz, whose angle is measured using a Michelson interferometer. The system achieved noise levels of ∼200prad/Hz⎯⎯⎯⎯⎯√ between 0.2 and 30 Hz and ∼10prad/Hz⎯⎯⎯⎯⎯√ above 100 Hz. Such a system can be applied to a broad range of fields from the study of rotational seismic motion and elastogravity signals to gravitational wave observation and tests of gravity.

CollectionsANU Research Publications
Date published: 2021
Type: Journal article
Source: Review of Scientific Instruments
DOI: 10.1063/5.0043098
Access Rights: Open Access


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