First cryogenic test operation of underground km-scale gravitational-wave observatory KAGRA

T. Akutsu, M. Ando, K. Arai, Y. Arai, S. Araki, A. Araya, N. Aritomi, H. Asada, Y. Aso, S. Atsuta, K. Awai, S. Bae, L. Baiotti, M. A. Barton, K. Cannon, E. Capocasa, C. S. Chen, T. W. Chiu, K. Cho, Y. K. ChuK. Craig, W. Creus, K. Doi, K. Eda, Y. Enomoto, R. Flaminio, Y. Fujii, M. K. Fujimoto, M. Fukunaga, M. Fukushima, T. Furuhata, A. Hagiwara, S. Haino, K. Hasegawa, K. Hashino, K. Hayama, S. Hirobayashi, E. Hirose, B. H. Hsieh, C. Z. Huang, B. Ikenoue, Y. Inoue, K. Ioka, Y. Itoh, K. Izumi, T. Kaji, T. Kajita, M. Kakizaki, M. Kamiizumi, S. Kanbara, N. Kanda, S. Kanemura, M. Kaneyama, G. Kang, J. Kasuya, Y. Kataoka, N. Kawai, S. Kawamura, T. Kawasaki, C. Kim, J. Kim, J. C. Kim, W. S. Kim, Y. M. Kim, N. Kimura, T. Kinugawa, S. Kirii, Y. Kitaoka, H. Kitazawa, Y. Kojima, K. Kokeyama, K. Komori, A. K.H. Kong, K. Kotake, R. Kozu, R. Kumar, H. S. Kuo, S. Kuroyanagi, H. K. Lee, H. M. Lee, H. W. Lee, M. Leonardi, C. Y. Lin, F. L. Lin, G. C. Liu, Y. Liu, E. Majorana, S. Mano, M. Marchio, T. Matsui, F. Matsushima, Y. Michimura, N. Mio, O. Miyakawa, A. Miyamoto, T. Miyamoto, K. Miyo, S. Miyoki, W. Morii, S. Morisaki, Y. Moriwaki, T. Morozumi, I. Murakami, M. Musha, K. Nagano, S. Nagano, K. Nakamura, T. Nakamura, H. Nakano, M. Nakano, K. Nakao, Y. Namai, T. Narikawa, L. Naticchioni, L. Nguyen Quynh, W. T. Ni, A. Nishizawa, Y. Obuchi, T. Ochi, J. J. Oh, S. H. Oh, M. Ohashi, N. Ohishi, M. Ohkawa, K. Okutomi, K. Ono, K. Oohara, C. P. Ooi, S. S. Pan, J. Park, F. E. Pena Arellano, I. Pinto, N. Sago, M. Saijo, Y. Saito, S. Saitou, K. Sakai, Y. Sakai, Y. Sakai, M. Sasai, M. Sasaki, Y. Sasaki, N. Sato, S. Sato, T. Sato, Y. Sekiguchi, N. Seto, M. Shibata, T. Shimoda, H. Shinkai, T. Shishido, A. Shoda, K. Somiya, E. J. Son, A. Suemasa, T. Suzuki, T. Suzuki, H. Tagoshi, H. Tahara, H. Takahashi, R. Takahashi, A. Takamori, H. Takeda, H. Tanaka, K. Tanaka, T. Tanaka, S. Tanioka, E. N. Tapia San Martin, D. Tatsumi, S. Terashima, T. Tomaru, T. Tomura, F. Travasso, K. Tsubono, S. Tsuchida, N. Uchikata, T. Uchiyama, A. Ueda, T. Uehara, S. Ueki, K. Ueno, F. Uraguchi, T. Ushiba, M. H.P.M. Van Putten, H. Vocca, S. Wada, T. Wakamatsu, Y. Watanabe, W. R. Xu, T. Yamada, A. Yamamoto, K. Yamamoto, K. Yamamoto, S. Yamamoto, T. Yamamoto, K. Yokogawa, J. Yokoyama, T. Yokozawa, T. H. Yoon, T. Yoshioka, H. Yuzurihara, S. Zeidler, Z. H. Zhu

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Abstract

KAGRA is a second-generation interferometric gravitational-wave detector with 3 km arms constructed at Kamioka, Gifu, Japan. It is now in its final installation phase, which we call bKAGRA (baseline KAGRA), with scientific observations expected to begin in late 2019. One of the advantages of KAGRA is its underground location of at least 200 m below the ground surface, which reduces seismic motion at low frequencies and increases the stability of the detector. Another advantage is that it cools down the sapphire test mass mirrors to cryogenic temperatures to reduce thermal noise. In April-May 2018, we operated a 3 km Michelson interferometer with a cryogenic test mass for 10 d, which was the first time that km-scale interferometer was operated at cryogenic temperatures. In this article, we report the results of this 'bKAGRA Phase 1' operation. We have demonstrated the feasibility of 3 km interferometer alignment and control with cryogenic mirrors.

Original languageEnglish
Article number165008
JournalClassical and Quantum Gravity
Volume36
Issue number16
DOIs
Publication statusPublished - Jul 23 2019

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Akutsu, T., Ando, M., Arai, K., Arai, Y., Araki, S., Araya, A., ... Zhu, Z. H. (2019). First cryogenic test operation of underground km-scale gravitational-wave observatory KAGRA. Classical and Quantum Gravity, 36(16), [165008]. https://doi.org/10.1088/1361-6382/ab28a9