Year: 2019
Type: article
Abstract: Torsion pendulums have been widely used in physical experiments, because their small restoring forces are suitable for tiny force measurement. Recently, some applications such as low-frequency gravity gradiometers have been proposed by focusing on their low resonant frequencies. Torsion pendulums with low resonant frequencies enable the suspended masses to be isolated from the ground, allowing for good response to the fluctuation of local gravity field at low frequencies. However, translational ground vibration can be transferred to the horizontal rotation of the torsion pendulum nonlinearly. This effect can have a non-negligible contribution to the sensitivity of torsion pendulums as gravity gradiometers. This paper evaluates the amount of nonlinear vibration noise, and discusses how to reduce it.
Source: Classical and Quantum Gravity
Authors: Tomofumi Shimoda, Masaki Ando
Institution: The University of Tokyo
Language: English
Subfield: Oceanography
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: green
Awards: Search for low frequency gravitational waves, Development of low-frequency gravitational-wave detector using superconductor, Torsion-type gravitational wave antenna for low-frequency observation, 重力場変動観測による地震速報へ向けたねじれ振り子型重力偏差計の開発, Experimental test of the quantum theory of macroscopic objects using wire oscillations, Construction of bread board model of space gravitational wave interferometer DECIGO
OpenAlex ID: W2906649732