A Low-Frequency Torsion Pendulum with Interferometric Readout

M. P. Ross; K. Venkateswara; C. A. Hagedorn; C. J. Leupold; P. W. F. Forsyth; J. D. Wegner; E. A. Shaw; J. G. Lee; J. H. Gundlach

doi:10.1063/5.0043098

A Low-Frequency Torsion Pendulum with Interferometric Readout

Instrumentation and Detectors 2021-06-02 v4 General Relativity and Quantum Cosmology Geophysics

Authors: M. P. Ross , K. Venkateswara , C. A. Hagedorn , C. J. Leupold , P. W. F. Forsyth , J. D. Wegner , E. A. Shaw , J. G. Lee , J. H. Gundlach

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Abstract

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 modified Michelson interferometer. The system achieved noise levels of $\sim200\ \text{prad}/\sqrt{\text{Hz}}$ between 0.2-30 Hz and $\sim10\ \text{prad}/\sqrt{\text{Hz}}$ 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.

Keywords

sensors and measurement frequency comb spectroscopy gravitational wave detectors

Cite

@article{arxiv.2101.01243,
  title  = {A Low-Frequency Torsion Pendulum with Interferometric Readout},
  author = {M. P. Ross and K. Venkateswara and C. A. Hagedorn and C. J. Leupold and P. W. F. Forsyth and J. D. Wegner and E. A. Shaw and J. G. Lee and J. H. Gundlach},
  journal= {arXiv preprint arXiv:2101.01243},
  year   = {2021}
}

A Low-Frequency Torsion Pendulum with Interferometric Readout

Abstract

Keywords

Cite

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