Speaker
Tomofumi Shimoda
(University of Tokyo)
Description
TOBA(TOrsion-Bar Antenna) is a gravitational wave detector using a torsion pendulum. The resonant frequency of torsional motion is ~1mHz, therefore it is sensitive to gravitational waves at lower frequency band (0.1-10Hz) even on the ground. Two prototype TOBAs were developed and they achieved strain sensitivity h ~ 1e-8/rtHz @0.1Hz - 1e-10/rtHz @5Hz. One of the dominant noise sources for them was seismic noise, especially coupling noise from translational seismic motion to test mass rotation. In order to improve the sensitivity and detect gravitational waves, it is indispensable to reduce this coupling noise. Here we show the specified five coupling routes and reduction methods for them.
Primary author
Tomofumi Shimoda
(University of Tokyo)
Co-authors
Ayaka Shoda
(National Astronomical Observatory of Japan)
Kazuhiro Yamamoto
(Institute for Cosmic Ray Research)
Masaki Ando
(University of Tokyo)
Naoki Aritomi
(University of Tokyo)
Ryutaro Takahashi
(National Astronomical Observatory of Japan)
Yoichi Aso
(National Astronomical Observatory of Japan)
Yuta Michimura
(University of Tokyo)
Yuya Kuwahara
(University of Tokyo)
