Seismic Cross-coupling Noise in Torsion Pendulums
arXiv:1802.06542 · doi:10.1103/PhysRevD.97.104003
Abstract
Detection of low frequency gravitational waves around 0.1 Hz is one of the important targets for future gravitational wave observation. One of the main sources of the expected signals is gravi- tational waves from binary intermediate-mass black hole coalescences which is proposed as one of the formation scenarios of supermassive black holes. By using a torsion pendulum, which can have a resonance frequency of a few millihertz, such signals can be measured on the ground since its rotational motion can act as a free mass down to 0.01 Hz. However, sensitivity of a realistic tor- sion pendulum will suffer from torsional displacement noise introduced from translational ground motion in the main frequency band of interest. Such noise is called seismic cross-coupling noise and there have been little research on it. In this paper, systematic investigation is performed to identify routes of cross-coupling transfer for standard torsion pendulums. Based on the results this paper also proposes reduction schemes of cross-coupling noise, and they were demonstrated experimen- tally in agreement with theory. This result establishes a basic way to reduce seismic noise in torsion pendulums for the most significant coupling routes.
arXiv comment10 pages, 12 figures
References in corpus (16)
- Observation of Gravitational Waves from a Binary Black Hole Merger
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Advanced Virgo: a 2nd generation interferometric gravitational wave detector
- Advanced LIGO
- GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
- GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2
- GW170814: A Three-Detector Observation of Gravitational Waves from a Binary Black Hole Coalescence
- Sub-millimeter Tests of the Gravitational Inverse-square Law
- Seismic gravity-gradient noise in interferometric gravitational-wave detectors
- Subtraction of Newtonian Noise Using Optimized Sensor Arrays
- Construction of KAGRA: an Underground Gravitational Wave Observatory
- A high-precision mechanical absolute-rotation sensor
- Impact of infrasound atmospheric noise on gravity detectors used for astrophysical and geophysical applications
- Upper Limit on Gravitational Wave Backgrounds at 0.2 Hz with Torsion-bar Antenna
- Ground Based Low-Frequency Gravitational-wave Detector With Multiple Outputs
- Suspension-thermal noise in spring-antispring systems for future gravitational-wave detectors
Cited by in corpus (5)
- A 6D interferometric inertial isolation system
- A Low-Frequency Torsion Pendulum with Interferometric Readout
- Nonlinear vibration transfer in torsion pendulums
- Mid-Frequency Gravitational Wave Detection and Sources
- TOrsion-Bar Antenna: A Ground-Based Detector for Low-Frequency Gravity Gradient Measurement