535 citations · 943 across the 25 of their papers we have counts for
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A Polarization-Decomposed Method for Simulating Inhomogeneous Birefringence in Laser-Interferometric Gravitational-Wave Detectors
Haoyu Wang, Yuta Michimura, Keiko Kokeyama +9
Birefringence in test mass substrates is an emerging limitation for current and future laser-interferometric gravitational-wave detectors, particularly as detectors move toward hig…
Optimizing Active Seismic Isolation Systems in Gravitational-Wave Detectors
Terrence Tsang, Fabián Erasmo Peña Arellano, Takafumi Ushiba +3
Gravitational wave detectors such as KAGRA, a 3-km long underground laser interferometer in Japan, require elaborate passive and active seismic isolation of their mirrors. With the…
Estimation of Newtonian noise from KAGRA cooling system
Rishabh Bajpai, Takayuki Tomaru, Toshikazu Suzuki +3
KAGRA is the first km-scale gravitational wave detector to be constructed underground and employ cryogenics to cool down its test masses. While the underground location provides a…
A laser interferometer accelerometer for vibration sensitive cryogenic experiments
Rishabh Bajpai, Takayuki Tomaru, Kazuhiro Yamamoto +5
Monitoring motion originating from ultra low-temperature cooling systems like cryocoolers is important for vibration sensitive cryogenic experiments like KAGRA. Since no commercial…
Vibration Analysis of KAGRA Cryostat at Cryogenic Temperature
Rishabh Bajpai, Takayuki Tomaru, Nobuhiro Kimura +4
KAGRA uses cryogenics to cool its sapphire test masses down to 20 K to reduce the thermal noise. However, cryocooler vibration and structural resonances of the cryostat couple to t…
Cryogenic suspension design for a kilometer-scale gravitational-wave detector
Takafumi Ushiba, Tomotada Akutsu, Yoichi Aso +43
We report the mirror suspension design for Large-scale Cryogenic Gravitational wave Telescope, KAGRA, during bKAGRA Phase 1. Mirror thermal noise is one of the fundamental noises f…
High Performance Heat Conductor with Small Spring Constant for Cryogenic Applications
Tomohiro Yamada, Takayuki Tomaru, Toshikazu Suzuki +5
We developed a soft and high thermal conductive heat link for cryogenic applications. The measured maximum thermal conductivity was approximately 18500 W/m/K at 10 K. This spring c…
An arm length stabilization system for KAGRA and future gravitational-wave detectors
T. Akutsu, M. Ando, K. Arai +198
Modern ground-based gravitational wave (GW) detectors require a complex interferometer configuration with multiple coupled optical cavities. Since achieving the resonances of the a…
Vibration isolation system with a compact damping system for power recycling mirrors of KAGRA
Y. Akiyama, T. Akutsu, M. Ando +169
A vibration isolation system called Type-Bp system used for power recycling mirrors has been developed for KAGRA, the interferometric gravitational-wave observatory in Japan. A sus…
Mirror actuation design for the interferometer control of the KAGRA gravitational wave telescope
Yuta Michimura, Tomofumi Shimoda, Takahiro Miyamoto +36
KAGRA is a 3-km cryogenic interferometric gravitational wave telescope located at an underground site in Japan. In order to achieve its target sensitivity, the relative positions o…