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19 April 2024

» arxiv » 0911.3090

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Thermal-noise-limited underground interferometer CLIO
Kazuhiro Agatsuma ; Koji Arai ; Masa-Katsu Fujimoto ; Seiji Kawamura ; Kazuaki Kuroda ; Osamu Miyakawa ; Shinji Miyoki ; Masatake Ohashi ; Toshikazu Suzuki ; Ryutaro Takahashi ; Daisuke Tatsumi ; Souichi Telada ; Takashi Uchiyama ; Kazuhiro Yamamoto ; CLIO collaborators ;
Date:	16 Nov 2009
Abstract:	We report on the current status of CLIO (Cryogenic Laser Interferometer Observatory), which is a prototype interferometer for LCGT (Large scale Cryogenic Gravitational-wave Telescope). LCGT is a Japanese next-generation interferometric gravitational wave detector featuring the use of cryogenic mirrors and a quiet underground site. The main purpose of CLIO is to demonstrate a reduction of the mirror thermal noise by cooling the sapphire mirrors. CLIO is located in an underground site of the Kamioka mine, 1000 m deep from the mountain top, to verify its advantages. After a few years of commissioning work, we have achieved a thermal-noise-limited sensitivity at room temperature. One of the main results of noise hunting was the elimination of thermal noise caused by a conductive coil-holder coupled with a pendulum through magnets.
Source:	arXiv, 0911.3090
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