Vibration isolation system with a compact damping system for power recycling mirrors of KAGRA

A vibration isolation system called the Type-Bp system used for power recycling mirrors has been developed for KAGRA, the interferometric gravitational-wave observatory in Japan. A suspension of the Type-Bp system passively isolates an optic from seismic vibration using three main pendulum stages equipped with two vertical vibration isolation systems. A compact reaction mass around each of the main stages allows for achieving sufficient damping performance with a simple feedback as well as vibration isolation ratio. Three Type-Bp systems were installed in KAGRA, and were proved to satisfy the requirements on the damping performance, and also on estimated residual displacement of the optics.

C. Kim | K. Kokeyama | H. Lee | M. Leonardi | F. Paoletti | R. Passaquieti | E. Son | F. Travasso | S. Bae | E. Capocasa | V. Dattilo | R. Flaminio | K. Izumi | G. Kang | J. Kim | W. Kim | R. Kumar | F. Lin | S. Morisaki | H. Vocca | L. Baiotti | K. Craig | T. Narikawa | N. Uchikata | H. Nakano | T. Akutsu | A. Araya | M. Barton | Y. Fujii | M. Fujimoto | K. Hayama | E. Hirose | K. Ioka | M. Kamiizumi | M. Marchiò | Y. Michimura | O. Miyakawa | A. Miyamoto | W. Morii | M. Ohashi | N. Ohishi | K. Okutomi | K. Sakai | T. Sekiguchi | Y. Sekiguchi | T. Shimoda | A. Shoda | K. Somiya | T. Suzuki | H. Tagoshi | R. Takahashi | T. Tomaru | K. Tsubono | T. Uchiyama | T. Ushiba | M. V. van Putten | H. Yuzurihara | S. Zeidler | T. Tomura | F. E. Peña Arellano | N. Aritomi | H. Takeda | E. N. Tapia San Martin | R. Kozu | B. Ikenoue | Y. Obuchi | M. Fukunaga | K. Ueno | T. Yokozawa | Y. Chu | S. Araki | Y. Aso | Y. Enomoto | M. Fukushima | S. Haino | B. Hsieh | T. Kajita | M. Kakizaki | T. Kawasaki | N. Kimura | H. Kitazawa | Y. Kojima | K. Komori | A. Kong | K. Kotake | H. Kuo | S. Kuroyanagi | C.Y. Lin | N. Mio | S. Miyoki | Y. Moriwaki | K. Nagano | S. Nagano | W. Ni | M. Ohkawa | K. Oohara | C. Ooi | N. Sago | Y. Sakai | H. Shinkai | T. Shishido | S. Tanioka | S. Tsuchida | T. Uehara | F. Uraguchi | W-R. Xu | K. Yokogawa | J. Yokoyama | T. Yoshioka | J. Oh | Y. Kitaoka | K. Cannon | C-S. Chen | M. Musha | T. Yamamoto | M. Shibata | S. Kuroki | Y. Inoue | H. Tanaka | T. Furuhata | K. Hashino | T. Kaji | S. Kanbara | J. Kasuya | S. Kirii | T. Matsui | A. Suemasa | C-Z. Huang | H. W. Lee | Y. Saito | H. Takahashi | K. Arai | T. Chiu | K. Nakamura | N. Kanda | N. Kawai | L. Nguyen Quynh | G. Liu | H. Asada | Y. Itoh | J. Kim | M. Nakano | A. Nishizawa | Zhaxisang Zhu | T. Nakamura | K. Doi | K. Tanaka | N. Someya | K. Yamamoto | J. Park | Y. Arai | T. Wakamatsu | S. Yamamoto | Y. Hashimoto | Shanshan Pan | T. Tanaka | H. Lee | M. Sasai | T. Yamada | S. Oh | K. Cho | K. Hasegawa | S. Kanemura | S. Sato | K. Ono | H. Tahara | S. Saito | T. Sato | Y. Akiyama | M. Ando | T. Hirayama | Y. Watanabe | S. -. Oh | Z. Zhu | E. N. Tapia San Martín

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