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An arm length stabilization system for KAGRA and future gravitational-wave detectors

Akutsu, T, Ando, M, Arai, K, Arai, K, Arai, Y, Araki, S, Araya, A, Aritomi, N, Aso, Y, Bae, S, Bae, Y, Baiotti, L, Bajpai, R, Barton, M A, Cannon, K, Capocasa, E, Chan, M, Chen, C S, Chen, K, Chen, Y, Chu, H, Chu, Y-K, Doi, K, Eguchi, S, Enomoto, Y, Flaminio, R, Fujii, Y, Fukunaga, M, Fukushima, M, Ge, G-G, Hagiwara, A, Haino, S, Hasegawa, K, Hayakawa, H, Hayama, K, Himemoto, Y, Hiranuma, Y, Hirata, N, Hirose, E, Hong, Z, Hsieh, B H, Huang, G-Z, Huang, P-W, Huang, Y, Ikenoue, B, Imam, S, Inayoshi, K, Inoue, Y, Ioka, K, Itoh, Y, Izumi, K, Jung, K, Jung, P, Kajita, T, Kamiizumi, M, Kanbara, S, Kanda, N, Kang, G, Kawaguchi, K, Kawai, N, Kawasaki, T, Kim, C, Kim, J C, Kim, W S, Kim, Y-M, Kimura, N, Kita, N, Kitazawa, H, Kojima, Y, Kokeyama, K, Komori, K, Kong, A K H, Kotake, K, Kozakai, C, Kozu, R, Kumar, R, Kume, J, Kuo, C, Kuo, H-S, Kuroyanagi, S, Kusayanagi, K, Kwak, K, Lee, H K, Lee, H W, Lee, R, Leonardi, M, C-C Lin, L, Lin, C-Y, Lin, F-L, Liu, G C, Luo, L-W, Marchio, M, Michimura, Y, Mio, N, Miyakawa, O, Miyamoto, A, Miyazaki, Y, Miyo, K, Miyoki, S, Morisaki, S, Moriwaki, Y, Musha, M, Nagano, K, Nagano, S, Nakamura, K, Nakano, H, Nakano, M, Nakashima, R, Narikawa, T, Negishi, R, Ni, W-T, Nishizawa, A, Obuchi, Y, Ogaki, W, Oh, J J, Oh, S H, Ohashi, M, Ohishi, N, Ohkawa, M, Ohmae, N, Okutomi, K, Oohara, K, Ooi, C P, Oshino, S, Pan, K-C, Pang, H, Park, J, Arellano, F E Peña, Pinto, I, Sago, N, Saito, S, Saito, Y, Sakai, K, Sakai, Y, Sakuno, Y, Sato, S, Sato, T, Sawada, T, Sekiguchi, T, Sekiguchi, Y, Shibagaki, S, Shimizu, R, Shimoda, T, Shimode, K, Shinkai, H, Shishido, T, Shoda, A, Somiya, K, Son, E J, Sotani, H, Sugimoto, R, Suzuki, T, Suzuki, T, Tagoshi, H, Takahashi, H, Takahashi, R, Takamori, A, Takano, S, Takeda, H, Takeda, M, Tanaka, H, Tanaka, K, Tanaka, K, Tanaka, T, Tanaka, T, Tanioka, S, Tapia San Martin, E N, Tatsumi, D, Telada, S, Tomaru, T, Tomigami, Y, Tomura, T, Travasso, F, Trozzo, L, Tsang, T, Tsubono, K, Tsuchida, S, Tsuzuki, T, Tuyenbayev, D, Uchikata, N, Uchiyama, T, Ueda, A, Uehara, T, Ueno, K, Ueshima, G, Uraguchi, F, Ushiba, T, van Putten, M H P M, Vocca, H, Wang, J, Wu, C, Wu, H, Wu, S, Xu, W-R, Yamada, T, Yamamoto, K, Yamamoto, K, Yamamoto, T, Yokogawa, K, Yokoyama, J, Yokozawa, T, Yoshioka, T, Yuzurihara, H, Zeidler, S, Zhao, Y and Zhu, Z-H 2020. An arm length stabilization system for KAGRA and future gravitational-wave detectors. Classical and Quantum Gravity 37 (3) , 035004. 10.1088/1361-6382/ab5c95

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Abstract

Modern ground-based gravitational wave (GW) detectors require a complex interferometer configuration with multiple coupled optical cavities. Since achieving the resonances of the arm cavities is the most challenging among the lock acquisition processes, the scheme called arm length stabilization (ALS) had been employed for lock acquisition of the arm cavities. We designed a new type of the ALS, which is compatible with the interferometers having long arms like the next generation GW detectors. The features of the new ALS are that the control configuration is simpler than those of previous ones and that it is not necessary to lay optical fibers for the ALS along the kilometer-long arms of the detector. Along with simulations of its noise performance, an experimental test of the new ALS was performed utilizing a single arm cavity of KAGRA. This paper presents the first results of the test where we demonstrated that lock acquisition of the arm cavity was achieved using the new ALS. We also demonstrated that the root mean square of residual noise was measured to be 8.2 Hz in units of frequency, which is smaller than the linewidth of the arm cavity and thus low enough to lock the full interferometer of KAGRA in a repeatable and reliable manner.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: IOP Publishing
ISSN: 0264-9381
Date of First Compliant Deposit: 19 March 2021
Date of Acceptance: 28 November 2019
Last Modified: 22 Mar 2021 14:43
URI: http://orca.cf.ac.uk/id/eprint/139925

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