TOrsion-Bar Antenna: A Ground-Based Detector for Low-Frequency Gravity Gradient Measurement

TL;DR

The paper introduces the Torsion-Bar Antenna (TOBA), a ground-based gravitational wave detector designed to observe low-frequency gravitational waves between 1 mHz and 10 Hz, expanding current observational capabilities.

Contribution

It provides an overview of TOBA's design, prototype experiments, and ongoing development, highlighting its potential to detect low-frequency gravitational waves.

Findings

Prototype experiments demonstrate feasibility

Current development aims to improve sensitivity

Potential to observe gravitational waves in new frequency band

Abstract

The Torsion-Bar Antenna (TOBA) is a torsion pendulum-based gravitational detector developed to observe gravitational waves in frequencies between 1 mHz and 10 Hz. The low resonant frequency of the torsion pendulum enables observation in this frequency band on the ground. The final target of TOBA is to observe gravitational waves with a 10 m detector and expand the observation band of gravitational waves. In this paper, an overview of TOBA, including the previous prototype experiments and the current ongoing development, is presented.