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. Chu; K. 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

doi:10.1088/1361-6382/ab28a9

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

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 language	English
Article number	165008
Journal	Classical and Quantum Gravity
Volume	36
Issue number	16
DOIs	https://doi.org/10.1088/1361-6382/ab28a9
State	Published - 23 Jul 2019

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10.1088/1361-6382/ab28a9

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Akutsu, T., Ando, M., Arai, K., Arai, Y., Araki, S., Araya, A., Aritomi, N., Asada, H., Aso, Y., Atsuta, S., Awai, K., Bae, S., Baiotti, L., Barton, M. A., Cannon, K., Capocasa, E., Chen, C. S., Chiu, T. W., Cho, K., ... 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

@article{10968ef0178440a2944513e73cd37e85,

title = "First cryogenic test operation of underground km-scale gravitational-wave observatory KAGRA",

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.",

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

note = "Publisher Copyright: {\textcopyright} 2019 IOP Publishing Ltd.",

year = "2019",

month = jul,

day = "23",

doi = "10.1088/1361-6382/ab28a9",

language = "English",

volume = "36",

journal = "Classical and Quantum Gravity",

issn = "0264-9381",

publisher = "IOP Publishing Ltd.",

number = "16",

}

Akutsu, T, Ando, M, Arai, K, Arai, Y, Araki, S, Araya, A, Aritomi, N, Asada, H, Aso, Y, Atsuta, S, Awai, K, Bae, S, Baiotti, L, Barton, MA, Cannon, K, Capocasa, E, Chen, CS, Chiu, TW, Cho, K, Chu, YK, Craig, K, Creus, W, Doi, K, Eda, K, Enomoto, Y, Flaminio, R, Fujii, Y, Fujimoto, MK, Fukunaga, M, Fukushima, M, Furuhata, T, Hagiwara, A, Haino, S, Hasegawa, K, Hashino, K, Hayama, K, Hirobayashi, S, Hirose, E, Hsieh, BH, Huang, CZ, Ikenoue, B, Inoue, Y, Ioka, K, Itoh, Y, Izumi, K, Kaji, T, Kajita, T, Kakizaki, M, Kamiizumi, M, Kanbara, S, Kanda, N, Kanemura, S, Kaneyama, M, Kang, G, Kasuya, J, Kataoka, Y, Kawai, N, Kawamura, S, Kawasaki, T, Kim, C, Kim, J, Kim, JC, Kim, WS, Kim, YM, Kimura, N, Kinugawa, T, Kirii, S, Kitaoka, Y, Kitazawa, H, Kojima, Y, Kokeyama, K, Komori, K, Kong, AKH, Kotake, K, Kozu, R, Kumar, R, Kuo, HS, Kuroyanagi, S, Lee, HK, Lee, HM, Lee, HW, Leonardi, M, Lin, CY, Lin, FL, Liu, GC, Liu, Y, Majorana, E, Mano, S, Marchio, M, Matsui, T, Matsushima, F, Michimura, Y, Mio, N, Miyakawa, O, Miyamoto, A, Miyamoto, T, Miyo, K, Miyoki, S, Morii, W, Morisaki, S, Moriwaki, Y, Morozumi, T, Murakami, I, Musha, M, Nagano, K, Nagano, S, Nakamura, K, Nakamura, T, Nakano, H, Nakano, M, Nakao, K, Namai, Y, Narikawa, T, Naticchioni, L, Nguyen Quynh, L, Ni, WT, Nishizawa, A, Obuchi, Y, Ochi, T, Oh, JJ, Oh, SH, Ohashi, M, Ohishi, N, Ohkawa, M, Okutomi, K, Ono, K, Oohara, K, Ooi, CP, Pan, SS, Park, J, Pena Arellano, FE, Pinto, I, Sago, N, Saijo, M, Saito, Y, Saitou, S, Sakai, K, Sakai, Y, Sakai, Y, Sasai, M, Sasaki, M, Sasaki, Y, Sato, N, Sato, S, Sato, T, Sekiguchi, Y, Seto, N, Shibata, M, Shimoda, T, Shinkai, H, Shishido, T, Shoda, A, Somiya, K, Son, EJ, Suemasa, A, Suzuki, T, Suzuki, T, Tagoshi, H, Tahara, H, Takahashi, H, Takahashi, R, Takamori, A, Takeda, H, Tanaka, H, Tanaka, K, Tanaka, T, Tanioka, S, Tapia San Martin, EN, Tatsumi, D, Terashima, S, Tomaru, T, Tomura, T, Travasso, F, Tsubono, K, Tsuchida, S, Uchikata, N, Uchiyama, T, Ueda, A, Uehara, T, Ueki, S, Ueno, K, Uraguchi, F, Ushiba, T, Van Putten, MHPM, Vocca, H, Wada, S, Wakamatsu, T, Watanabe, Y, Xu, WR, Yamada, T, Yamamoto, A, Yamamoto, K, Yamamoto, K, Yamamoto, S, Yamamoto, T, Yokogawa, K, Yokoyama, J, Yokozawa, T, Yoon, TH, Yoshioka, T, Yuzurihara, H, Zeidler, S & Zhu, ZH 2019, 'First cryogenic test operation of underground km-scale gravitational-wave observatory KAGRA', Classical and Quantum Gravity, vol. 36, no. 16, 165008. https://doi.org/10.1088/1361-6382/ab28a9

TY - JOUR

T1 - First cryogenic test operation of underground km-scale gravitational-wave observatory KAGRA

AU - Akutsu, T.

AU - Ando, M.

AU - Arai, K.

AU - Arai, Y.

AU - Araki, S.

AU - Araya, A.

AU - Aritomi, N.

AU - Asada, H.

AU - Aso, Y.

AU - Atsuta, S.

AU - Awai, K.

AU - Bae, S.

AU - Baiotti, L.

AU - Barton, M. A.

AU - Cannon, K.

AU - Capocasa, E.

AU - Chen, C. S.

AU - Chiu, T. W.

AU - Cho, K.

AU - Chu, Y. K.

AU - Craig, K.

AU - Creus, W.

AU - Doi, K.

AU - Eda, K.

AU - Enomoto, Y.

AU - Flaminio, R.

AU - Fujii, Y.

AU - Fujimoto, M. K.

AU - Fukunaga, M.

AU - Fukushima, M.

AU - Furuhata, T.

AU - Hagiwara, A.

AU - Haino, S.

AU - Hasegawa, K.

AU - Hashino, K.

AU - Hayama, K.

AU - Hirobayashi, S.

AU - Hirose, E.

AU - Hsieh, B. H.

AU - Huang, C. Z.

AU - Ikenoue, B.

AU - Inoue, Y.

AU - Ioka, K.

AU - Itoh, Y.

AU - Izumi, K.

AU - Kaji, T.

AU - Kajita, T.

AU - Kakizaki, M.

AU - Kamiizumi, M.

AU - Kanbara, S.

AU - Kanda, N.

AU - Kanemura, S.

AU - Kaneyama, M.

AU - Kang, G.

AU - Kasuya, J.

AU - Kataoka, Y.

AU - Kawai, N.

AU - Kawamura, S.

AU - Kawasaki, T.

AU - Kim, C.

AU - Kim, J.

AU - Kim, J. C.

AU - Kim, W. S.

AU - Kim, Y. M.

AU - Kimura, N.

AU - Kinugawa, T.

AU - Kirii, S.

AU - Kitaoka, Y.

AU - Kitazawa, H.

AU - Kojima, Y.

AU - Kokeyama, K.

AU - Komori, K.

AU - Kong, A. K.H.

AU - Kotake, K.

AU - Kozu, R.

AU - Kumar, R.

AU - Kuo, H. S.

AU - Kuroyanagi, S.

AU - Lee, H. K.

AU - Lee, H. M.

AU - Lee, H. W.

AU - Leonardi, M.

AU - Lin, C. Y.

AU - Lin, F. L.

AU - Liu, G. C.

AU - Liu, Y.

AU - Majorana, E.

AU - Mano, S.

AU - Marchio, M.

AU - Matsui, T.

AU - Matsushima, F.

AU - Michimura, Y.

AU - Mio, N.

AU - Miyakawa, O.

AU - Miyamoto, A.

AU - Miyamoto, T.

AU - Miyo, K.

AU - Miyoki, S.

AU - Morii, W.

AU - Morisaki, S.

AU - Moriwaki, Y.

AU - Morozumi, T.

AU - Murakami, I.

AU - Musha, M.

AU - Nagano, K.

AU - Nagano, S.

AU - Nakamura, K.

AU - Nakamura, T.

AU - Nakano, H.

AU - Nakano, M.

AU - Nakao, K.

AU - Namai, Y.

AU - Narikawa, T.

AU - Naticchioni, L.

AU - Nguyen Quynh, L.

AU - Ni, W. T.

AU - Nishizawa, A.

AU - Obuchi, Y.

AU - Ochi, T.

AU - Oh, J. J.

AU - Oh, S. H.

AU - Ohashi, M.

AU - Ohishi, N.

AU - Ohkawa, M.

AU - Okutomi, K.

AU - Ono, K.

AU - Oohara, K.

AU - Ooi, C. P.

AU - Pan, S. S.

AU - Park, J.

AU - Pena Arellano, F. E.

AU - Pinto, I.

AU - Sago, N.

AU - Saijo, M.

AU - Saito, Y.

AU - Saitou, S.

AU - Sakai, K.

AU - Sakai, Y.

AU - Sasai, M.

AU - Sasaki, M.

AU - Sasaki, Y.

AU - Sato, N.

AU - Sato, S.

AU - Sato, T.

AU - Sekiguchi, Y.

AU - Seto, N.

AU - Shibata, M.

AU - Shimoda, T.

AU - Shinkai, H.

AU - Shishido, T.

AU - Shoda, A.

AU - Somiya, K.

AU - Son, E. J.

AU - Suemasa, A.

AU - Suzuki, T.

AU - Tagoshi, H.

AU - Tahara, H.

AU - Takahashi, H.

AU - Takahashi, R.

AU - Takamori, A.

AU - Takeda, H.

AU - Tanaka, H.

AU - Tanaka, K.

AU - Tanaka, T.

AU - Tanioka, S.

AU - Tapia San Martin, E. N.

AU - Tatsumi, D.

AU - Terashima, S.

AU - Tomaru, T.

AU - Tomura, T.

AU - Travasso, F.

AU - Tsubono, K.

AU - Tsuchida, S.

AU - Uchikata, N.

AU - Uchiyama, T.

AU - Ueda, A.

AU - Uehara, T.

AU - Ueki, S.

AU - Ueno, K.

AU - Uraguchi, F.

AU - Ushiba, T.

AU - Van Putten, M. H.P.M.

AU - Vocca, H.

AU - Wada, S.

AU - Wakamatsu, T.

AU - Watanabe, Y.

AU - Xu, W. R.

AU - Yamada, T.

AU - Yamamoto, A.

AU - Yamamoto, K.

AU - Yamamoto, S.

AU - Yamamoto, T.

AU - Yokogawa, K.

AU - Yokoyama, J.

AU - Yokozawa, T.

AU - Yoon, T. H.

AU - Yoshioka, T.

AU - Yuzurihara, H.

AU - Zeidler, S.

AU - Zhu, Z. H.

PY - 2019/7/23

Y1 - 2019/7/23

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85072220386&partnerID=8YFLogxK

U2 - 10.1088/1361-6382/ab28a9

DO - 10.1088/1361-6382/ab28a9

M3 - Article

AN - SCOPUS:85072220386

VL - 36

JO - Classical and Quantum Gravity

JF - Classical and Quantum Gravity

SN - 0264-9381

IS - 16

M1 - 165008

ER -

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

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