Akutsu, T. and Ando, M. and Arai, K. and Arai, Y. and Araki, S. and Araya, A. and Aritomi, N. and Asada, H. and Aso, Y. and Bae, S. and Bae, Y. and Baiotti, L. and Bajpai, R. and Barton, M. A. and Cannon, K. and Cao, Z. and Capocasa, E. and Chan, M. and Chen, C. and Chen, K. and Chen, Y. and Chiang, C-Y. and Chu, H. and Chu, Y-K. and Eguchi, S. and Enomoto, Y. and Flaminio, R. and Fujii, Y. and Fujikawa, Y. and Fukunaga, M. and Fukushima, M. and Gao, D. and Ge, G. and Ha, S. and Hagiwara, A. and Haino, S. and Han, W-B. and Hasegawa, K. and Hatoya, R. and Hattori, K. and Hayakawa, H. and Hayama, K. and Himemoto, Y. and Hiranuma, Y. and Hirata, N. and Hirose, E. and Hong, Z. and Hsieh, B. and Huang, G-Z. and Huang, H-Y. and Huang, P. and Huang, Y-C. and Huang, Y. and Hui, D. C. Y. and Ide, S. and Ikenoue, B. and Imam, S. and Inayoshi, K. and Inoue, Y. and Ioka, K. and Ito, K. and Itoh, Y. and Izumi, K. and Jeon, C. and Jin, H-B. and Jung, K. and Jung, P. and Kaihotsu, K. and Kajita, T. and Kakizaki, M. and Kamiizumi, M. and Kanda, N. and Kang, G and Kawaguchi, K. and Kawai, N. and Kawasaki, T. and Kim, C. and Kim, J. and Kim, J. C. and Kim, W. S. and Kim, Y-M. and Kimura, N. and Kita, N. and Kitazawa, H. and Kojima, Y. and Kokeyama, K. and Komori, K. and Kong, A. K. H. and Kotake, K. and Kozakai, C. and Kozu, R. and Kumar, R. and Kume, J. and Kuo, C. and Kuo, H-S. and Kuromiya, Y. and Kuroyanagi, S. and Kusayanagi, K. and Kwak, K. and Lee, H. K. and Lee, H. W. and Lee, R. and Leonardi, M. and Li, K. L. and Lin, L. C-C. and Lin, C-Y. and Lin, F-K. and Lin, F-L. and Lin, H. L. and Liu, G. C. and Luo, L-W. and Majorana, E. and Marchio, M. and Michimura, Y. and Mio, N. and Miyakawa, O. and Miyamoto, A. and Miyazaki, Y. and Miyo, K. and Miyoki, S. and Mori, Y. and Morisaki, S. and Moriwaki, Y. and Nagano, K. and Nagano, S. and Nakamura, K. and Nakano, H. and Nakano, M. and Nakashima, R. and Nakayama, Y. and Narikawa, T. and Naticchioni, L. and Negishi, R. and Nguyen Quynh, L. and Ni, W-T. and Nishizawa, A. and Nozaki, S. and Obuchi, Y. and Ogaki, W. and Oh, J. J. and Oh, K. and Oh, S. H. and Ohashi, M. and Ohishi, N. and Ohkawa, M. and Ohta, H. and Okutani, Y. and Okutomi, K. and Oohara, K. and Ooi, C. and Oshino, S. and Otabe, S. and Pan, K. and Pang, H. and Parisi, A. and Park, J. and Peña Arellano, F. E. and Pinto, I. and Sago, N. and Saito, S. and Saito, Y. and Sakai, K. and Sakai, Y. and Sakuno, Y. and Sato, S. and Sato, T. and Sawada, T. and Sekiguchi, T. and Sekiguchi, Y. and Shao, L. and Shibagaki, S. and Shimizu, R. and Shimoda, T. and Shimode, K. and Shinkai, H. and Shishido, T. and Shoda, A. and Somiya, K. and Son, E. J. and Sotani, H. and Sugimoto, R. and Suresh, J. and Suzuki, T. and Suzuki, T. and Tagoshi, H. and Takahashi, H. and Takahashi, R. and Takamori, A. and Takano, S. and Takeda, H. and Takeda, M. and Tanaka, H. and Tanaka, K. and Tanaka, K. and Tanaka, T. and Tanaka, T. and Tanioka, S. and Tapia San Martin, E. N. and Telada, S. and Tomaru, T. and Tomigami, Y. and Tomura, T. and Travasso, F. and Trozzo, L. and Tsang, T. and Tsao, J-S. and Tsubono, K. and Tsuchida, S. and Tsutsui, T. and Tsuzuki, T. and Tuyenbayev, D. and Uchikata, N. and Uchiyama, T. and Ueda, A. and Uehara, T. and Ueno, K. and Ueshima, G. and Uraguchi, F. and Ushiba, T. and van Putten, M. H. P. M. and Vocca, H. and Wang, J. and Washimi, T. and Wu, C. and Wu, H. and Wu, S. and Xu, W-R. and Yamada, T. and Yamamoto, K. and Yamamoto, K. and Yamamoto, T. and Yamashita, K. and Yamazaki, R. and Yang, Y. and Yokogawa, K. and Yokoyama, J. and Yokozawa, T. and Yoshioka, T. and Yuzurihara, H. and Zeidler, S. and Zhan, M. and Zhang, H. and Zhao, Y. and Zhu, Z-H. (2021) Vibration isolation systems for the beam splitter and signal recycling mirrors of the KAGRA gravitational wave detector. Classical and Quantum Gravity, 38 (6). Art. No. 065011. ISSN 0264-9381. doi:10.1088/1361-6382/abd922. https://resolver.caltech.edu/CaltechAUTHORS:20210309-072452422
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Abstract
KAGRA is an underground interferometric gravitational wave detector which is currently being commissioned. This detector relies on high-performance vibration-isolation systems to suspend its key optical components. These suspensions come in four different configurations, of which the type-B is used for the beam splitter and signal recycling mirrors. The type-B suspension comprises the payload, three geometric anti-spring filters for vertical isolation and one inverted pendulum for horizontal isolation. The payload comprises the optic, its marionette and their recoil masses, which hold local displacement sensors and coil magnet actuators used for damping the resonant modes of oscillation of the suspension itself. The beam splitter version has a modified lower section to accommodate a wider optical component. The payload is also equipped with an optical lever, used to monitor and control the position of the suspended optics from the ground. All four suspensions have now been installed in vacuum chambers. We describe the mechanical, electrical and control design, and the measured performance compared to requirements.
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| Additional Information: | © 2021 IOP Publishing Ltd. Received 23 September 2020; Revised 29 November 2020; Accepted 6 January 2021; Published 5 March 2021. We appreciate the contributions from Takanori Sekiguchi, Riccardo DeSalvo, Gianni Gennaro and Joris van Heijningen during the prototype development. This work was supported by MEXT, JSPS Leading-edge Research Infrastructure Program, JSPS Grant-in-Aid for Specially Promoted Research 26000005, JSPS Grant-in-Aid for Scientific Research on Innovative Areas 2905: JP17H06358, JP17H06361 and JP17H06364, JSPS Core-to-Core Program A. Advanced Research Networks, JSPS Grant-in-Aid for Scientific Research (S) 17H06133, the joint research program of the Institute for Cosmic Ray Research, University of Tokyo, National Research Foundation (NRF) and Computing Infrastructure Project of KISTI-GSDC in Korea, Academia Sinica (AS), AS Grid Center (ASGC) and the Ministry of Science and Technology (MoST) in Taiwan under grants including AS-CDA-105-M06, Advanced Technology Center (ATC) of NAOJ, Mechanical Engineering Center of KEK, the LIGO project, and the Virgo project. | ||||||||||||||||||||||||||||||||||
| Group: | LIGO | ||||||||||||||||||||||||||||||||||
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| Issue or Number: | 6 | ||||||||||||||||||||||||||||||||||
| DOI: | 10.1088/1361-6382/abd922 | ||||||||||||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20210309-072452422 | ||||||||||||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20210309-072452422 | ||||||||||||||||||||||||||||||||||
| Official Citation: | T Akutsu et al 2021 Class. Quantum Grav. 38 065011 | ||||||||||||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||||||||||||
| ID Code: | 108354 | ||||||||||||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||||||||||
| Deposited By: | Tony Diaz | ||||||||||||||||||||||||||||||||||
| Deposited On: | 10 Mar 2021 18:54 | ||||||||||||||||||||||||||||||||||
| Last Modified: | 12 Jul 2022 19:46 |
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