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1. Overview of KAGRA: Calibration, detector characterization, physical environmental monitors, and the geophysics interferometer

Author

R. Shimizu, Ettore Majorana, H. B. Jin, P. Jung, M. Fukunaga, G-Z. Huang, F. E. Peña Arellano, H. Pang, Kunihiro Nagano, John J. Oh, Atsushi Nishizawa, M. Nakano, C. Kozakai, Yasufumi Kojima, S. Saito, Takayuki Tomaru, T. Tomura, Y. Fujikawa, Kazuhiro Hayama, Hajime Sotani, Shigeo Nagano, Masatake Ohashi, S. Otabe, Naoki Aritomi, Chunglee Kim, Tatsuhiro Yamada, Kipp Cannon, Shuen De Wu, Yuhang Zhao, Fumihiro Uraguchi, Hideki Asada, Ryutaro Takahashi, Kei Kotake, Yutaro Enomoto, Naoko Ohishi, L. W. Luo, K. Inayoshi, S. Bae, S. Ha, Sadakazu Haino, T. Narikawa, Yoshiyuki Obuchi, Ryo Yamazaki, K. Hattori, Y. Tomigami, K. Ueno, Zhoujian Cao, Keiko Kokeyama, Kentaro Somiya, G. Ge, K. Yamashita, Wei-Tou Ni, Satoshi Tsuchida, Takashi Sato, M. Zhan, Akiteru Takamori, Masaki Ando, Y. Nakayama, F. K. Lin, W-R. Xu, T. Sawada, Seog Oh, Ray-Kuang Lee, C. P. Ooi, C. Chen, Takahiro Tanaka, S. Ide, H. Vocca, J. Wang, Albert K. H. Kong, T. Yoshioka, Lijing Shao, T. Shimoda, Y. Okutani, R. Flaminio, S. Eguchi, T. Sekiguchi, Y. Sakuno, R. Kozu, Hyang Woon Lee, Zong-Hong Zhu, Y. Hiranuma, Wen-Biao Han, Hideaki Hayakawa, K. Chen, Y. Mori, Yuki Fujii, H. Ohta, Y. Miyazaki, A. Shoda, B. H. Hsieh, Y. Sakai, K. Sakai, S. Oshino, T. Ushiba, Luca Baiotti, Simon Zeidler, Yousuke Itoh, Hiroyuki Nakano, Takaaki Kajita, Yuki Inoue, S. Shibagaki, Hiroyuki Takeda, Chau Ron Wu, Y-K. Chu, M. Kamiizumi, Guo-Chin Liu, Yoshiaki Himemoto, I. M. Pinto, S. Sato, Y. Kuromiya, Yuta Michimura, N. Hirata, A. Miyamoto, Y. Huang, K. L. Li, Yi Chen, Yuichiro Sekiguchi, Kimio Tsubono, Hideyuki Tagoshi, S. Imam, H. L. Lin, M. Chan, Rajesh Kumar, L. C.C. Lin, K. Kusayanagi, K. Okutomi, D. C. Y. Hui, Sachiko Kuroyanagi, K. Kaihotsu, J. Kim, Jinsook Kim, K. Ito, Takashi Uchiyama, Kunihito Ioka, L. Nguyen Quynh, K. Yokogawa, R. Bajpai, K. Shimode, Norikatsu Mio, Koya Arai, Toshihiro Tsuzuki, L. Naticchioni, T. Shishido, R. Nakashima, M. Takeda, Akito Araya, A. Parisi, T. Yokozawa, E. N. Tapia San Martin, Souichi Telada, M. H. P. M. van Putten, Jishnu Suresh, Y. Arai, K. Miyo, K. Oohara, N. Kawai, Soichiro Morisaki, C. Jeon, W. S. Kim, T. Uehara, Jun'ichi Yokoyama, Nobutada Kimura, K. Oh, D. Tuyenbayev, Kentaro Komori, N. Kita, T. Kawasaki, T. Tsang, Hong Wu, Yi Yang, Kuo-Chuan Pan, S. Tanioka, K. Jung, A. Hagiwara, D. Gao, R. Negishi, C-Y. Lin, E. Capocasa, Shinji Miyoki, H. Chu, G. Ueshima, Tomotada Akutsu, M. A. Barton, Y. M. Kim, C-Y. Chiang, Hisa-aki Shinkai, L. Trozzo, Norichika Sago, K. Kwak, J. Kume, Takahiro Yamamoto, Nobuyuki Kanda, S. Nozaki, H. K. Tanaka, H. Yuzurihara, Masako Kakizaki, Eiichi Hirose, Kouji Nakamura, F-L. Lin, M. Leonardi, Haruki Kitazawa, J-S. Tsao, Takuya Tsutsui, M. Marchio, Yoichi Aso, J. Park, K. Izumi, F. Travasso, Hirotaka Takahashi, Nami Uchikata, Mitsuhiro Fukushima, H. Y. Huang, G. Kang, H. Zhang, A. Ueda, Sakae Araki, Osamu Miyakawa, Chin Guo Kuo, Y. Moriwaki, K. Yamamoto, Toshio Suzuki, Hyun Lee, Y. Bae, Masashi Ohkawa, K. Hasegawa, T. Washimi, Kyohei Kawaguchi, B. Ikenoue, H-S. Kuo, P. W. Huang, Kazuyuki Tanaka, Y. Saito, S. Takano, E. J. Son, W. Ogaki, Z. Hong, R. Sugimoto, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and KAGRA

Subjects
[PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], data acquisition, interferometer, General Physics and Astronomy, FOS: Physical sciences, detector: noise, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, General Relativity and Quantum Cosmology, Optics, 0103 physical sciences, Calibration, detector: calibration, KAGRA, laser: interferometer, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics, 010308 nuclear & particles physics, business.industry, geophysics, Detector, gravitational radiation, KAGRA gravitational wave kamioka, gravitational radiation detector, Characterization (materials science), detector: sensitivity, Interferometry, F32 Calibration and operation of gravitational wave detector, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Astrophysics - Instrumentation and Methods for Astrophysics, business, detector: sensitivity, data acquisition, interferometer, geophysics, detector: noise, detector: calibration, KAGRA, gravitational radiation detector, gravitational radiation, laser: interferometer
Abstract

KAGRA is a newly built gravitational wave observatory, a laser interferometer with a 3 km arm length, located in Kamioka, Gifu, Japan. In this series of articles, we present an overview of the baseline KAGRA, for which we finished installing the designed configuration in 2019. This article describes the method of calibration (CAL) used for reconstructing gravitational wave signals from the detector outputs, as well as the characterization of the detector (DET). We also review the physical environmental monitors (PEM) system and the geophysics interferometer (GIF). Both are used for characterizing and evaluating the data quality of the gravitational wave channel. They play important roles in utilizing the detector output for gravitational wave searches. These characterization investigations will be even more important in the near future, once gravitational wave detection has been achieved, and in using KAGRA in the gravitational wave astronomy era., Comment: 2021/02/08 Accepted by PTEP

Published
2021
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2. Vibration isolation systems for the beam splitter and signal recycling mirrors of the KAGRA gravitational wave detector

Author

Hirotaka Takahashi, T. Sekiguchi, Nami Uchikata, Zong-Hong Zhu, Mitsuhiro Fukushima, H. Y. Huang, Ping Huang, Kimio Tsubono, M. Kamiizumi, R. Kozu, Shuji Saito, K. L. Li, Y. Moriwaki, Y. Mori, Atsushi Nishizawa, Souichi Telada, A. Miyamoto, T. Sawada, Kazuhiro Hayama, D. C. Y. Hui, W. S. Kim, Hiroyuki Nakano, S. Imam, Shigeo Nagano, H. L. Lin, S. Otabe, Takuya Tsutsui, Kei Kotake, Masashi Ohkawa, Jinsook Kim, K. Ito, Soichiro Morisaki, Takashi Sato, Yasufumi Kojima, C. Jeon, M. Marchio, Toshihiro Tsuzuki, T. Yamamoto, Yoichi Aso, Kohei Inayoshi, Nobuyuki Kanda, Hideaki Hayakawa, M. Takeda, Y. Tomigami, Hajime Sotani, Nobutada Kimura, Chunglee Kim, Yuka Fujii, Toshio Suzuki, M. Zhan, F. E. Peña Arellano, Fumihiro Uraguchi, T. Yokozawa, H. K. Tanaka, Hyun Lee, Eiichi Hirose, Kouji Nakamura, K. Yamashita, H. Vocca, Takahiro Tanaka, Satoshi Tsuchida, C. C. Kuo, D. Tuyenbayev, T. Yamada, Sadakazu Haino, H. Pang, C. Wu, K. Ueno, B. Ikenoue, F-L. Lin, Lijing Shao, T. Shimoda, Y. Okutani, K. Kaihotsu, Zhoujian Cao, Yoshiaki Himemoto, I. M. Pinto, S. Tanioka, K. Jung, Y. Sakuno, M. A. Barton, K. Izumi, Albert K. H. Kong, H-S. Kuo, M. Nakano, Wen-Biao Han, G. Ueshima, Y. Huang, Kyujin Kwak, K. Yamamoto, B. H. Hsieh, M. Leonardi, Y. Bae, Yuki Inoue, T. Ushiba, Yuichiro Sekiguchi, K. Shimode, J-S. Tsao, Shuen De Wu, S. Shibagaki, W. Ogaki, Simon Zeidler, Luca Baiotti, Yousuke Itoh, Z. Hong, Yuhang Zhao, E. Capocasa, Kyohei Kawaguchi, Hong Wu, Y. Kuromiya, L. Nguyen Quynh, Hiroyuki Takeda, Haruki Kitazawa, Y. Hiranuma, T. Narikawa, R. Bajpai, J. Park, Ryo Yamazaki, Y. M. Kim, H. Chu, A. Hagiwara, Hisa-aki Shinkai, C-Y. Lin, S. Sato, N. Hirata, Jun'ichi Yokoyama, Keiko Kokeyama, L. Naticchioni, T. Shishido, C-Y. Chiang, Yi Chen, R. Sugimoto, Y. Nakayama, Takashi Uchiyama, Kunihito Ioka, Yutaro Enomoto, K. Hattori, R. Nakashima, L. Trozzo, K. Oh, Yoshiyuki Obuchi, E. N. Tapia San Martin, Y. Sakai, K. Sakai, D. Gao, T. Yoshioka, N. Kawai, Norichika Sago, Akiteru Takamori, Kazuyuki Tanaka, S. Eguchi, F. K. Lin, R. Flaminio, H. B. Jin, T. Kawasaki, Akito Araya, Shinji Miyoki, G. Kang, H. Ohta, S. Takano, Kentaro Somiya, R. Hatoya, T. Kajita, A. Parisi, T. Washimi, S. Bae, A. Shoda, S. Oshino, S. Ide, H. Zhang, Masaki Ando, K. Hasegawa, E. J. Son, J. Kume, M. H. P. M. van Putten, Jishnu Suresh, Yi Yang, Yoshio Arai, C. Chen, A. Ueda, T. Tomura, K. Miyo, K. Oohara, Sakae Araki, Osamu Miyakawa, K. Okutomi, Sachiko Kuroyanagi, Tomotada Akutsu, Hideki Asada, R. Shimizu, L. C.-C. Lin, Naoki Aritomi, N. Kita, T. Tsang, Ryutaro Takahashi, Kuo-Chuan Pan, M. Chan, R. Negishi, Seog Oh, Takayuki Tomaru, Jung-Hoon Kim, Ettore Majorana, P. Jung, M. Fukunaga, G-Z. Huang, Yoshihiko Saito, Kunihiro Nagano, John J. Oh, G. Ge, C. Kozakai, Y. Fujikawa, Wei-Tou Ni, Kentaro Komori, Hideyuki Tagoshi, S. Nozaki, Norikatsu Mio, Kai-Feng Chen, S. Ha, T. Uehara, H. Yuzurihara, Masako Kakizaki, Kipp Cannon, L. W. Luo, Yuta Michimura, Rajesh Kumar, K. Kusayanagi, Ray-Kuang Lee, Hyang Woon Lee, Y. Miyazaki, Guo-Chin Liu, J. Z. Wang, Y-K. Chu, K. Yokogawa, Koji Arai, Masatake Ohashi, Naoko Ohishi, W-R. Xu, C. P. Ooi, F. Travasso, Laboratoire d'Annecy de Physique des Particules (LAPP), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)

Subjects
Gravitational-wave observatory, Physics and Astronomy (miscellaneous), 7. Clean energy, 01 natural sciences, Signal, law.invention, gravitational wave detectors, Optics, law, gravitational waves, vibration isolation, underground experiments, gravitational wave detectors, 0103 physical sciences, KAGRA, Interferometric gravitational wave detector, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, mirror, Physics, 010308 nuclear & particles physics, Payload, business.industry, Detector, oscillation, optics, vibration isolation, Vibration isolation, underground experiments, gravitational waves, mechanical engineering, gravitational radiation detector: interferometer, business, Beam splitter, mechanics, performance
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.

Published
2021
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3. Overview of KAGRA: Detector design and construction history

Author

Yuta Michimura, Kyujin Kwak, Yoshiaki Himemoto, I. M. Pinto, Rajesh Kumar, K. Kusayanagi, G. Ge, R. Kozu, Soichiro Morisaki, Yuichiro Sekiguchi, Kai-Feng Chen, M. A. Barton, H. Chu, Shuji Saito, N. Kita, T. Tsang, S. Oshino, C. Z. Huang, T. Ushiba, Luca Baiotti, Simon Zeidler, Yousuke Itoh, F. Travasso, C. C. Kuo, D. Tuyenbayev, Hirotaka Takahashi, Nami Uchikata, Takashi Uchiyama, Kunihito Ioka, Kuo-Chuan Pan, M. Kamiizumi, A. Miyamoto, B. H. Hsieh, Toshio Suzuki, Hyun Lee, H. Yuzurihara, Ray-Kuang Lee, Hisa-aki Shinkai, Se-Hong Oh, J. Z. Wang, Y-K. Chu, K. Yokogawa, R. Negishi, Nobuyuki Kanda, T. Kawasaki, F. L. Lin, Shuen De Wu, Albert K. H. Kong, Yuhang Zhao, Yuki Inoue, S. Shibagaki, B. Ikenoue, Y. Tomigami, Hong Wu, Yutaro Enomoto, H. K. Tanaka, H-S. Kuo, Atsushi Nishizawa, Takahiro Tanaka, Eiichi Hirose, Kouji Nakamura, Hyang Woon Lee, Mitsuhiro Fukushima, Ping Huang, T. Sekiguchi, L. Trozzo, Norichika Sago, S. Sato, Kentaro Somiya, A. Hagiwara, Shinji Miyoki, Y. Sakuno, C-Y. Lin, Y. Miyazaki, K. Hasegawa, Yoshiyuki Obuchi, N. Hirata, Yi Chen, Koji Arai, Masaki Ando, S. Tanioka, K. Jung, M. Leonardi, R. Bajpai, Y. Hiranuma, Hideyuki Tagoshi, R. Sugimoto, Kipp Cannon, G. Ueshima, Kazuyuki Tanaka, Y. Saito, S. Takano, S. Bae, R. Shimizu, M. Marchio, T. Shishido, Zong-Hong Zhu, L. C.-C. Lin, M. Chan, Yoichi Aso, L. W. Luo, Haruki Kitazawa, J. Park, Jun'ichi Yokoyama, Y. Sakai, R. Nakashima, Satoshi Tsuchida, C. Chen, Takashi Sato, P. Jung, S. Eguchi, E. Capocasa, Yasufumi Kojima, Hiroyuki Nakano, T. Yoshioka, R. Flaminio, K. Sakai, T. Shimoda, E. J. Son, J. Kume, M. Fukunaga, K. Izumi, Hajime Sotani, Chunglee Kim, A. Shoda, K. Okutomi, Tomotada Akutsu, Sachiko Kuroyanagi, Akito Araya, T. Kajita, G. Kang, W. Ogaki, Masatake Ohashi, Z. Hong, Fumihiro Uraguchi, Kunihiro Nagano, O. Miyakawa, Kazuhiro Hayama, Tatsuhiro Yamada, Sadakazu Haino, C. Wu, M. H. P. M. van Putten, K. Ueno, S. Imam, Takayuki Tomaru, K. Miyo, K. Oohara, Naoko Ohishi, Y. M. Kim, Jinsook Kim, John J. Oh, Kentaro Komori, A. Ueda, Sakae Araki, Toshihiro Tsuzuki, T. Narikawa, E. N. Tapia San Martin, Kohei Inayoshi, M. Takeda, Keiko Kokeyama, Masashi Ohkawa, T. Yokozawa, N. Kawai, C. Kozakai, W-R. Xu, Yasunori Fujii, Y. Moriwaki, K. Shimode, C. P. Ooi, K. Yamamoto, Y. Huang, Y. Bae, Kyohei Kawaguchi, Shigeo Nagano, Kei Kotake, Wei-Tou Ni, Akiteru Takamori, H. Vocca, Norikatsu Mio, Yoshio Arai, T. Uehara, Naoki Aritomi, Ryutaro Takahashi, Guo-Chin Liu, T. Tomura, F. E. Peña Arellano, H. Pang, M. Nakano, T. Yamamoto, Hideaki Hayakawa, Kimio Tsubono, Hiroki Takeda, Souichi Telada, T. Sawada, W. S. Kim, Nobutada Kimura, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and KAGRA

Subjects
[PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Physics - Instrumentation and Detectors, activity report, detector: design, laser: interferometer, noise: thermal, KAGRA, gravitational radiation detector, background, cryogenics, history, mirror, fabrication, FOS: Physical sciences, General Physics and Astronomy, General Relativity and Quantum Cosmology (gr-qc), Cryogenics, fabrication, 01 natural sciences, General Relativity and Quantum Cosmology, law.invention, Telescope, Optics, law, 0103 physical sciences, noise: thermal, KAGRA, laser: interferometer, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, mirror, Instrumentation and Methods for Astrophysics (astro-ph.IM), activity report, detector: design, Physics, 010308 nuclear & particles physics, business.industry, background, Detector, Instrumentation and Detectors (physics.ins-det), gravitational radiation detector, Interferometry, cryogenics, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], history, business, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

KAGRA is a newly built gravitational-wave telescope, a laser interferometer comprising arms with a length of 3\,km, located in Kamioka, Gifu, Japan. KAGRA was constructed under the ground and it is operated using cryogenic mirrors that help in reducing the seismic and thermal noise. Both technologies are expected to provide directions for the future of gravitational-wave telescopes. In 2019, KAGRA finished all installations with the designed configuration, which we call the baseline KAGRA. In this occasion, we present an overview of the baseline KAGRA from various viewpoints in a series of of articles. In this article, we introduce the design configurations of KAGRA with its historical background., 33 pages, 10 figures

Published
2020
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4. An arm length stabilization system for KAGRA and future gravitational-wave detectors

Author

Norikatsu Mio, M. A. Barton, Masashi Ohkawa, Kai-Feng Chen, Soichiro Morisaki, K. Doi, D. Tuyenbayev, Wei-Tou Ni, Hong Wu, Kazuhiro Hayama, Jong-Dae Park, Hisa-aki Shinkai, Y. Hiranuma, N. Kimura, Zhaohuan Zhu, S. Miyoki, Chau Ron Wu, Se-Hong Oh, M. Marchio, M. Kamiizumi, M. Chan, B. H. Hsieh, Atsushi Nishizawa, Ryoji Takahashi, Yoichi Aso, C. Y. Lin, G. Ueshima, L. C.C. Lin, Koji Nagano, Takahiro Yamada, Takaaki Kajita, Yuki Inoue, Shuen De Wu, Kipp Cannon, Kentaro Komori, H. K. Lee, M. Ohashi, T. Shimoda, H Hayakawa, K. Izumi, Y. Tomigami, P. Jung, M. Fukunaga, Y. Huang, R. Shimizu, H. Chu, Y. M. Kim, T. Uehara, G-Z. Huang, A. Hagiwara, Hiroyuki Nakano, Y. Moriwaki, R. Bajpai, Jun'ichi Yokoyama, G. Ge, Takahiro Tanaka, Takaaki Yokozawa, Kei Kotake, Yoshiaki Himemoto, Keiko Kokeyama, F. E. Peña Arellano, Tetsuro Shishido, H. Pang, Y. Sakuno, M. Takeda, N. Kita, R. Nakashima, Yasufumi Kojima, Y. Sakai, Satoshi Tsuchida, Hideyuki Tagoshi, Y. Saito, Takayuki Tomaru, T. Tsang, Kentaro Somiya, Yoshio Arai, K. Sakai, Yuichiro Sekiguchi, Jianfang Wang, J. Kume, Hajime Sotani, Chunglee Kim, M. Nakano, L. W. Luo, Feng Li Lin, Yongheng Zhao, H. Vocca, Bungo Ikenoue, T. Yoshioka, Takahiro Yamamoto, Kuo-Chuan Pan, Hirotaka Takahashi, R. Flaminio, Nami Uchikata, R. Negishi, S. Oshino, S. Takano, K. Shimode, Masaki Ando, Tomotada Akutsu, T. Sekiguchi, C. Chen, Noriaki Ohmae, S. Sato, L. Baiotti, E. N. Tapia San Martin, E. Hirose, Tatsuya Narikawa, Akito Araya, K. Yamamoto, Nobuyuki Kanda, Sadakazu Haino, T. Ushiba, Y. Bae, K. Ueno, Mitsuhiro Fukushima, D. Tatsumi, S. Kanbara, Ping Huang, S. Eguchi, Takashi Uchiyama, Kunihito Ioka, Innocenzo M. Pinto, R. Kozu, Kyohei Kawaguchi, J. J. Oh, E. J. Son, L. Trozzo, Shuji Saito, Naoki Aritomi, Kenta Tanaka, Yi Chen, Akiteru Takamori, Kouji Nakamura, W. Ogaki, Naru Hirata, Chihiro Kozakai, H. Yuzurihara, T. Sato, M. H. P. M. van Putten, Z. Hong, Ayaka Shoda, T. Tomura, K. Tsubono, G. Kang, S. Bae, K. Miyo, H. Tanaka, Albert K. H. Kong, Yoshinori Fujii, Yutaro Enomoto, Ray-Kuang Lee, K. Kwak, Hyang Woon Lee, Simon Zeidler, F. Uraguchi, Yousuke Itoh, Yuta Michimura, A. Miyamoto, Rajesh Kumar, K. Kusayanagi, C. Ooi, Y. Obuchi, Y. Miyazaki, Sachiko Kuroyanagi, Nobuyuki Kawai, M. Leonardi, Guo-Chin Liu, R. Sugimoto, Hiroki Takeda, Haruki Kitazawa, Souichi Telada, T. Sawada, W. S. Kim, W-R. Xu, K. Hasegawa, H-S. Kuo, Naoko Ohishi, S. Shibagaki, Mitsuru Musha, Y-K. Chu, K. Yokogawa, Shigeo Nagano, Chin Guo Kuo, Koji Arai, Ken-ichi Oohara, A. Ueda, Sakae Araki, Osamu Miyakawa, S. Tanioka, K. Jung, Takamasa Suzuki, E. Capocasa, Koki Okutomi, S. Imam, Jinsook Kim, Toshihiro Tsuzuki, Kohei Inayoshi, N. Sago, T. Kawasaki, F. Travasso, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), KAGRA, and Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules)

Subjects
Physics - Instrumentation and Detectors, Optical fiber, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, fibre: optical, Physics::Optics, cavity: optical, 01 natural sciences, General Relativity and Quantum Cosmology, law.invention, gravitational-wave detector, law, noise: spectrum, Astronomical interferometer, 95.75.Kk, Multi-colour, Physics, Detector, Instrumentation and Detectors (physics.ins-det), 07.60.Ly, Interferometry, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], noise: suppression, Astrophysics - Instrumentation and Methods for Astrophysics, performance, interferometer, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Noise (electronics), Laser linewidth, Optics, 0103 physical sciences, KAGRA, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, numerical calculations, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics::Galaxy Astrophysics, 010308 nuclear & particles physics, business.industry, Gravitational wave, stability, 04.80.Nn, optics, gravitational radiation detector, laser, interferometer: design, Physics::Accelerator Physics, 95.55.Ym, business, Gravitational-wave detector, Interferometer
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 and residual noise was measured to be $8.2\,\mathrm{Hz}$ 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., Comment: 21 pages, 8figures

Published
2020
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5. Construction of KAGRA: an underground gravitational-wave observatory

Author

S. Ota, M. Marchio, T. Furuhata, Yoichi Aso, J. Park, Shinji Miyoki, Y. Sasaki, Masashi Ohkawa, T. Kagawa, D. Jia, Kieran Craig, Y. Sugimoto, T. Uehara, Takaaki Yokozawa, M. Asano, Y. Liu, Akito Araya, Koki Okutomi, K. Kawaguchi, S. Yamaguchi, Nobuyuki Kanda, T. Miyamoto, Kazuyuki Tanaka, Takahiro Tanaka, H. K. Tanaka, Y. Saito, E. J. Son, Jinsook Kim, Yuichiro Sekiguchi, Hirotaka Takahashi, Eiichi Hirose, Kouji Nakamura, Toshihiro Tsuzuki, K. Awai, K. Miyake, Sho Fujibayashi, N. Uchikata, Akiteru Takamori, T. Miener, Kentaro Komori, F. Matsushima, Kazuhiro Yamamoto, Y. Kitaoka, Satoshi Tsuchida, M. Morioka, T. Wakamatsu, Mitsuhiro Fukushima, Tomotada Akutsu, Nobuyuki Matsumoto, K. Miyo, K. Oohara, N. Mio, Eric Hennes, Kazuhiro Agatsuma, Takashi Uchiyama, K. Shiga, A. Hagiwara, T. Ushiba, Tatsuya Kume, Innocenzo M. Pinto, Tomasz Starecki, Yoshinori Fujii, Y. Tachibana, C-Y. Lin, Kunihito Ioka, S. Harita, A. Shoda, Ken-ichi Nakao, R. Flaminio, Norichika Sago, H. Suwabe, Masatake Ohashi, Masako Kakizaki, J. Kato, Motoyuki Saijo, Simon Zeidler, T. Matsui, Yousuke Itoh, H. Kakuhata, Suguru Takada, Ken Ono, T. Shimoda, Ryoji Takahashi, J. V. van Heijningen, Y. Sato, Ayaka Kumeta, Takaaki Kajita, Yuki Susa, Yutaka Shikano, S. Ueki, S. Kanbara, T. Saito, K. Hashino, S. Yamamoto, M. Murakoshi, Hiroyuki Nakano, Yuki Inoue, Shinya Kanemura, Hyang Woon Lee, Tatsuya Narikawa, M. A. Barton, M. Fujisawa, Sakae Araki, T. Utsuki, T. Hirayama, F. E. Peña Arellano, Keiko Kokeyama, J. F. J. van den Brand, Osamu Miyakawa, Jun'ichi Yokoyama, L. Zheng, Mitsuru Musha, T. Arima, Yuta Michimura, Toshikazu Suzuki, Alessandro Bertolini, T. Ogawa, Y. Ono, Hideharu Ishizaki, Seiji Kawamura, Y. Muraki, M. Toritani, T. Kaji, A. Yanagida, Hideyuki Tagoshi, K. Sakai, A. Miyamoto, R. Goetz, S. Sato, D. Chen, C. L. Mueller, Makoto Uyeshima, Rajesh Kumar, Y. Hayashida, N. Hirata, Koji Nagano, M. Kamiizumi, L. Baiotti, Hirotaka Yuzurihara, W. Morii, Masa-Katsu Fujimoto, T. Yamamoto, T. Nonomura, Leo Tsukada, Hisa-aki Shinkai, M. Nakano, C. Tokoku, David B. Tanner, N. Arai, Daisuke Tatsumi, Yuya Kuwahara, K. Kobayashi, J. Kasuya, Yoshiyuki Obuchi, Kentaro Somiya, Soichiro Morisaki, Kyung-Suk Cho, Y. Zhao, N. Someya, A. Khalaidovski, K. Yano, K. Doi, Masaki Ando, Hironori Nakao, S. Atsuta, Maria Ilaria Del Principe, T. Narita, N. Ohishi, H. Tamura, Hyun Lee, Kyoko Okino, K. Hasegawa, B. Ikenoue, Kazunari Eda, Kazuhiro Hayama, Yasufumi Kojima, Masashi Hasegawa, Chunglee Kim, Fumihiro Uraguchi, Y. Sakakibara, Sadakazu Haino, K. Ueno, Ettore Majorana, John J. Oh, Koji Kubo, Kimio Tsubono, Nobuyuki Kawai, Hiroki Takeda, Souichi Telada, Tai Hyun Yoon, Y. Hashimoto, W. S. Kim, Wei-Tou Ni, S. Koike, T. Sekiguchi, Shuhei Mano, Y. Moriwaki, T. Sato, N. Kimura, Shigeo Nagano, Kei Kotake, Takayuki Tomaru, S. Saitou, Y. Oda, Takashi Nakamura, J. Guscott, Hideki Ishitsuka, Hideki Asada, Masaru Shibata, T. Yaginuma, Seog Oh, K. Hirai, S. Wada, M. H.P.M. Van Putten, M. Kaneyama, Yutaro Enomoto, Fumiko Kawazoe, J. Kim, Y. Akiyama, A. Suemasa, Y. Kataoka, Naoki Aritomi, Kazuaki Kuroda, R. DeSalvo, Noriaki Ohmae, (Astro)-Particles Physics, and KAGRA Collaboration

Subjects
Physics - Instrumentation and Detectors, Gravitational-wave observatory, Design, Physics::Instrumentation and Detectors, FOS: Physical sciences, General Physics and Astronomy, Laser, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, General Relativity and Quantum Cosmology, gravitational-wave detector, 11. Sustainability, 0103 physical sciences, ddc:530, KAGRA, Interferometer, Kamioka, Aerospace engineering, 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics, 010308 nuclear & particles physics, Gravitational wave, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Vibration, Interferometry, seismic motion, High Energy Physics::Experiment, Astrophysics - Instrumentation and Methods for Astrophysics, business
Abstract

著者人数: 227名 (所属. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS): 東谷, 千比呂), Number of authors: 227 (Affiliation. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS): Tokoku, Chihiro), Accepted: 2017-11-21, 資料番号: SA1170370000

Published
2018
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6. Length Standard: Effects of Air Refractivity and Vacuum for a Laser Interferometer

Author

Souichi Telada

Subjects
Physics, Atom interferometer, Gravitational wave, business.industry, Detector, Surfaces and Interfaces, Laser, law.invention, Interferometry, Optics, law, Astronomical interferometer, Speed of light, Metre, General Materials Science, business, Instrumentation, Spectroscopy
Abstract

The current definition of the meter has been based on ‘the speed of light’ since 1983. Length standard measurements are performed using laser interferometers and are generally conducted in air. Specifically, a long length (referred to as “distance”) is measured in air. The accuracy of distance measurements in air is limited by the refractivity of air, which can be determined with an accuracy of only approximately 10-8. For smaller uncertainties, we must measure distances in vacuum. For example, both laser strain meters, which are used for tectonic measurements, and laser interferometer gravitational wave detectors employ long-baseline interferometers in vacuum. Since the sensitivity of gravitational wave detectors become worse by residual gases in vacuum, a pressure of less than 10-5 Pa is required for laser beam paths in the interferometer.

Published
2009
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7. Current status of Japanese detectors

Author

D. Tatsumi, Virginio Sannibale, Masa Katsu Fujimoto, T. Haruyama, Nobuaki Sato, Alessandro Bertolini, Ryutaro Takahashi, Akito Araya, Kazuhiro Agatsuma, Kazuhiro Yamamoto, Akira Yamamoto, Koji Arai, Souichi Telada, K. Tsubono, Hideki Ishitsuka, Toshitaka Yamazaki, Shinji Miyoki, Takashi Uchiyama, Nobuyuki Kanda, N. Nakagawa, Masatake Ohashi, Norichika Awaya, T. Akutsu, Akiteru Takamori, Takayuki Tomaru, Szabolcs Marka, Mitsuhiro Fukushima, Kazuaki Kuroda, Riccardo DeSalvo, T. Suzuki, T. Shintomi, and Masaki Ando

Subjects
Physics, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Gravitational wave, Attenuation, Detector, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Seismic noise, 01 natural sciences, 7. Clean energy, Noise (electronics), General Relativity and Quantum Cosmology, law.invention, Telescope, Interferometry, Optics, 13. Climate action, law, 0103 physical sciences, 010306 general physics, business, Sensitivity (electronics)
Abstract

Current status of TAMA and CLIO detectors in Japan is reported in this article. These two interferometric gravitational-wave detectors are being developed for the large cryogenic gravitational wave telescope (LCGT) which is a future plan for detecting gravitational wave signals at least once per year. TAMA300 is being upgraded to improve the sensitivity in low frequency region after the last observation experiment in 2004. To reduce the seismic noises, we are installing new seismic isolation system, which is called TAMA Seismic Attenuation System, for the four test masses. We confirmed stable mass locks of a cavity and improvements of length and angular fluctuations by using two SASs. We are currently optimizing the performance of the third and fourth SASs. We continue TAMA300 operation and R&D studies for LCGT. Next data taking in the summer of 2007 is planned. CLIO is a 100-m baseline length prototype detector for LCGT to investigate interferometer performance in cryogenic condition. The key features of CLIO are that it locates Kamioka underground site for low seismic noise level, and adopts cryogenic Sapphire mirrors for low thermal noise level. The first operation of the cryogenic interferometer was successfully demonstrated in February of 2006. Current sensitivity at room temperature is close to the target sensitivity within a factor of 4. Several observation experiments at room temperature have been done. Once the displacement noise reaches at thermal noise level of room temperature, its improvement by cooling test mass mirrors should be demonstrated., 6 pages, 5 figures, Proceedings of GWDAW-11

Published
2007
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8. Status of the CLIO project

Author

Shinji Miyoki, Takayuki Tomaru, W. Morii, Shuzo Takemoto, Hideki Ishitsuka, Yoshio Saito, Takakazu Shintomi, Yasuo Higashi, Junpei Akamatsu, Daisuke Tatsumi, Tomiyoshi Haruyama, Hideaki Hayakawa, Masaki Ando, Akito Araya, Nobuaki Sato, Akira Yamamoto, Kazuhiko Yamamoto, Toshihiro Higashi, Souichi Telada, Toshikazu Suzuki, Kazuaki Kuroda, Masatake Ohashi, H Momose, Kunihiko Kasahara, and Takashi Uchiyama

Subjects
Physics, Physics and Astronomy (miscellaneous), business.industry, Gravitational wave, Detector, Strainmeter, Seismic noise, law.invention, Telescope, Interferometry, Optics, Observatory, law, Astronomical interferometer, business
Abstract

The CLIO project involves the Cryogenic Laser Interferometer Observatory (CLIO) detector complex for gravitational wave detection and the Kamioka Laser Interferometric Strainmeter for the acquisition of geophysical data. CLIO has been constructed to demonstrate the feasibility of a future project, the Large-scale Cryogenic Gravitational wave Telescope (LCGT). It will utilize the low seismic and stable environment of the Kamioka mine as well as sapphire mirrors and suspension fibres at low temperature to reduce thermal noise. We designed CLIO to have a noise level limited by the thermal noise of sapphire mirrors and sapphire suspension fibres, which vary from 3 × 10−19 m Hz−1/2 at 300 K to 2 × 10−20 m Hz−1/2 at 20 K around 100 Hz. The strainmeter has already succeeded in monitoring the Earth's tidal motion with a strain sensitivity of 2 × 10−12. The seismic noise veto between these same-scale interferometers is expected to provide an effective means of data selection for the gravitational wave signal analysis, and the ground motion data obtained by the strainmeter will help to maintain the stable operation of CLIO.

Published
2004
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9. Development of a multistage laser frequency stabilization for an interferometric gravitational-wave detector

Author

Akitoshi Ueda, Takashi Nakamura, Nobuki Kawashima, Masaki Ando, Shigeo Nagano, Ken'ichi Nakagawa, Koji Arai, Kozo Ueda, Norihiko Kamikubota, Masatake Ohashi, Akito Araya, Daisuke Tatsumi, Eiichi Mizuno, Nobuyuki Kanda, Atsushi Sekiya, Shigenori Moriwaki, Shinji Miyoki, Kuniharu Tochikubo, Mitsuru Musha, Ryutaro Takahashi, Takahiro Tanaka, Ken-ichi Ueda, Norikatsu Mio, Sumihiro Matsumura, Kazuaki Kuroda, N. Ohishi, Shuichi Sato, Misao Sasaki, Shoken M. Miyama, M. A. Barton, Nobuhiro Tsuda, Toshitaka Yamazaki, Hideki Ishizuka, Koichi Waseda, Takayuki Tomaru, Hideki Asada, Ken-ichi Oohara, Masaru Shibata, Osamu Miyakawa, Gen'ichi Horikoshi, Yujiro Ogawa, Akiteru Takamori, Kazuhiro Yamamoto, Yoshihide Kozai, Hideyuki Tagoshi, Shigemi Otsuka, Mitsuhiro Fukushima, Toshikazu Suzuki, Yasufumi Kojima, Keita Kawabe, Toshifumi Futamase, Ken-ichi Nakao, Shinsuke Taniguchi, Namio Matsuda, Seiji Kawamura, Takashi Uchiyama, Masa-Katsu Fujimoto, Kimio Tsubono, Yoshio Saito, and Souichi Telada

Subjects
Physics, Coupling, Interferometry, Optics, business.industry, Detector, Astronomical interferometer, Topology (electrical circuits), Interferometric gravitational wave detector, business, Instrumentation, Sensitivity (electronics), TAMA 300
Abstract

Laser frequency stabilization is essential for interferometric gravitational-wave detectors to attain their target sensitivity. We have designed a multistage laser frequency stabilization system which has been applied in the development of the TAMA 300 gravitational-wave detector in Japan. The control topology consisting of two cascaded loops were employed to secure high feedback gain and reliable detector operation and thus allow the best frequency stability and uninterrupted long-term observation. We achieved simultaneously a frequency stability of 5 × 10^(−5) Hz/√HZ , and a common-mode rejection ratio (which reduces the coupling of frequency noise to spurious signals in the detector) of 37 dB. The developed system enabled us to operate TAMA 300 with sufficient sensitivity and stability that it had the potential to register gravitational-wave events. The system was confirmed to be suitable for a gravitational-wave detector from the observation run of TAMA 300.

Published
2003
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10. Development of a light source with an injection-locked Nd:YAG laser and a ring-mode cleaner for the TAMA 300 gravitational-wave detector

Author

Akito Araya, Hideki Ishizuka, Mitsuru Musha, Takahiro Tanaka, Akitoshi Ueda, Namio Matsuda, Mitsuhiro Fukushima, K. Oohara, Nobuki Kawashima, Daisuke Tatsumi, Shigeo Nagano, Shinji Miyoki, Koji Arai, Seiji Kawamura, Takashi Nakamura, Gen'ichi Horikoshi, Kuniharu Tochikubo, Masaki Ando, Nobuhiro Tsuda, Kazuaki Kuroda, Masa Katsu Fujimoto, Nobuyuki Kanda, Misao Sasaki, Norihiko Kamikubota, M. A. Barton, Takayuki Tomaru, Toshikazu Suzuki, Masatake Ohashi, Takashi Uchiyama, Kimio Tsubono, Yoshio Saito, Shigenori Moriwaki, Yasufumi Kojima, Yujiro Ogawa, Akiteru Takamori, Kazuhiro Yamamoto, N. Ohishi, Ken-ichi Ueda, Souichi Telada, Ken'ichi Nakagawa, Ryutaro Takahashi, Sumihiro Matsumura, Osamu Miyakawa, Keita Kawabe, Yoshihide Kozai, Hideyuki Tagoshi, Toshitaka Yamazaki, Toshifumi Futamase, Eiichi Mizuno, Norikatsu Mio, Shinsuke Taniguchi, Shuichi Sato, and Shoken M. Miyama

Subjects
Physics, Gravitational-wave observatory, business.industry, Linear polarization, Detector, Laser, TAMA 300, law.invention, Interferometry, Optics, law, Nd:YAG laser, Optoelectronics, business, Instrumentation, Noise (radio)
Abstract

We have developed a light source suitable for laser interferometric gravitational-wave detectors. The developed light source has high power, TEM00 mode, linear polarization, high frequency stability, and low intensity noise. The light source with the quality is essential for attaining the goal sensitivity in the TAMA 300 and was found to be available for a observation run of a gravitational-wave detector.

Published
2002
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11. Stable Operation of a 300-m Laser Interferometer with Sufficient Sensitivity to Detect Gravitational-Wave Events within Our Galaxy

Author

Kimio Tsubono, Yoshio Saito, Akito Araya, Toshitaka Yamazaki, Souichi Telada, Osamu Miyakawa, Yasufumi Kojima, Hiromi Yakura, Kazuaki Kuroda, Akitoshi Ueda, Seiji Kawamura, Takashi Uchiyama, K. Oohara, Youich Aso, Shigemi Otsuka, Koichi Waseda, Kazuhiro Kondo, Ken-ichi Nakao, Nobuhiro Tsuda, Toshikazu Suzuki, Namio Matsuda, Yuko Watanabe, Yoshinori Kobayashi, Kuniharu Tochikubo, Satoshi Okutomi, Ken'ichi Nakagawa, Hideki Ishizuka, Yujiro Ogawa, Akiteru Takamori, Takahiro Tanaka, Norihiko Kamikubota, Kazuhiro Yamamoto, Ryutaro Takahashi, Daisuke Tatsumi, Naoko Ohishi, Hideki Asada, Yoshihide Kozai, Hideyuki Tagoshi, Masaki Ando, Mitsuru Musha, Takashi Nakamura, Norikatsu Mio, Shigeo Nagano, Keita Kawabe, Kazuyuki Miura, Masaru Shibata, Masa Katsu Fujimoto, Shuichi Sato, Mitsuhiro Fukushima, Shoken M. Miyama, Gen'ichi Horikoshi, Takayuki Tomaru, M. Ohashi, Nobuki Kawashima, Kentaro Somiya, Kenji Numata, Kazuhiro Hayama, Shigenori Moriwaki, Ken-ichi Ueda, Nobuyuki Kanda, Toshifumi Futamase, Atsushi Sekiya, Shinji Miyoki, Misao Sasaki, Koji Arai, M. A. Barton, Shinsuke Taniguchi, and Gerhard Heinzel

Subjects
Physics, Gravitational wave, Astronomy, Lasers, Astrophysics (astro-ph), Detector, FOS: Physical sciences, General Physics and Astronomy, Binary number, General Relativity and Quantum Cosmology (gr-qc), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Laser, Sensitivity and Specificity, General Relativity and Quantum Cosmology, Galaxy, law.invention, Interferometry, Neutron star, law, Interferometric gravitational wave detector, Astrophysics::Galaxy Astrophysics, Gravitation
Abstract

TAMA300, an interferometric gravitational-wave detector with 300-m baseline length, has been developed and operated with sufficient sensitivity to detect gravitational-wave events within our galaxy and sufficient stability for observations; the interferometer was operated for over 10 hours stably and continuously. With a strain-equivalent noise level of $h\sim 5 \times 10^{-21} /\sqrt{\rm Hz}$, a signal-to-noise ratio (SNR) of 30 is expected for gravitational waves generated by a coalescence of 1.4 $M_\odot$-1.4 $M_\odot$ binary neutron stars at 10 kpc distance. %In addition, almost all noise sources which limit the sensitivity and which %disturb the stable operation have been identified. We evaluated the stability of the detector sensitivity with a 2-week data-taking run, collecting 160 hours of data to be analyzed in the search for gravitational waves., 5 pages, 4 figures

Published
2001
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12. Reduction of thermal fluctuations in a cryogenic laser interferometric gravitational wave detector

Author

Kazuhiro Agatsuma, Seiji Kawamura, Masa-Katsu Fujimoto, Toshikazu Suzuki, Kazuhiro Yamamoto, Souichi Telada, Shinji Miyoki, Takanori Saito, Daisuke Tatsumi, Tomiyoshi Haruyama, N. Ohishi, Takakazu Shintomi, Ryutaro Takahashi, Takashi Uchiyama, Osamu Miyakawa, Koji Arai, and Masatake Ohashi

Subjects
Physics, Physics - Instrumentation and Detectors, business.industry, Gravitational wave, Physics::Instrumentation and Detectors, Detector, FOS: Physical sciences, General Physics and Astronomy, Thermal fluctuations, General Relativity and Quantum Cosmology (gr-qc), Instrumentation and Detectors (physics.ins-det), Cryogenics, Laser, General Relativity and Quantum Cosmology, law.invention, Interferometry, Optics, law, Thermal, Interferometric gravitational wave detector, business
Abstract

The thermal fluctuation of mirror surfaces is the fundamental limitation for interferometric gravitational wave (GW) detectors. Here, we experimentally demonstrate for the first time a reduction in a mirror's thermal fluctuation in a GW detector with sapphire mirrors from the Cryogenic Laser Interferometer Observatory at 17\,K and 18\,K. The detector sensitivity, which was limited by the mirror's thermal fluctuation at room temperature, was improved in the frequency range of 90\,Hz to 240\,Hz by cooling the mirrors. The improved sensitivity reached a maximum of $2.2 \times 10^{-19}\,\textrm{m}/\sqrt{\textrm{Hz}}$ at 165\,Hz., Accepted for publication in Physical Review Letters, 5 pages, 2 figures

Published
2012

13. Direct Measurement of Thermal Fluctuation of High-QPendulum

Author

Kazuhiro Agatsuma, Shinji Miyoki, Seiji Kawamura, Kazuhiro Yamamoto, Souichi Telada, Masatake Ohashi, Osamu Miyakawa, Takashi Uchiyama, and Kazuaki Kuroda

Subjects
Physics, Detector, Pendulum, FOS: Physical sciences, General Physics and Astronomy, General Relativity and Quantum Cosmology (gr-qc), Laser, Noise (electronics), General Relativity and Quantum Cosmology, Computational physics, law.invention, Interferometry, Quality (physics), Classical mechanics, law, Thermal, Actuator
Abstract

We achieved for the first time a direct measurement of the thermal fluctuation of a pendulum in an off-resonant region using a laser interferometric gravitational wave detector. These measurements have been well identified for over one decade by an agreement with a theoretical prediction, which was derived by a fluctuation-dissipation theorem. Thermal fluctuation is dominated by the contribution of resistances in coil-magnet actuator circuits. When we tuned these resistances, the noise spectrum also changed according to a theoretical prediction. The measured thermal noise level corresponds to a high quality factor on the order of 10^5 of the pendulum., 10 pages, 4 figures

Published
2010
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14. Status of Japanese gravitational wave detectors

Author

Takanori Saito, Takashi Uchiyama, Akiteru Takamori, Kazuhiro Yamamoto, Alessandro Bertolini, D. Tatsumi, Kazuhiro Agatsuma, Tomiyoshi Haruyama, Ryutaro Takahashi, T. Yamazaki, Takayuki Tomaru, Osamu Miyakawa, Shinji Miyoki, Kimio Tsubono, Souichi Telada, Yaka Wakabayashi, Kazuaki Kuroda, M. Fukushima, Virginio Sannibale, Keisuke Izumi, Toshikazu Suzuki, Nodoka Sato, Hideharu Ishizaki, Akira Yamamoto, Masatake Ohashi, S. Márka, Takakazu Shintomi, R. DeSalvo, Koji Arai, I. Nakatani, and M. K. Fujimoto

Subjects
Physics, Gravitational-wave observatory, Physics and Astronomy (miscellaneous), business.industry, Gravitational wave, Physics::Instrumentation and Detectors, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Particle detector, law.invention, Telescope, Interferometry, Optics, law, Astronomical interferometer, business
Abstract

The Large-scale Cryogenic Gravitational wave Telescope (LCGT) is planned as a future Japanese project for gravitational wave detection. A 3 km interferometer will be built in an underground mine at Kamioka. Cryogenic sapphire mirrors are going to be employed for the test masses. For the demonstration of LCGT technologies, two prototype interferometers, TAMA300 and CLIO, are being developed. This paper describes the current status of the LCGT project and the two prototype interferometers.

Published
2009

15. Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts

Author

H. Ward, A. Chandler, Kevin M. Ryan, T. Regimbau, Ken'ichi Nakagawa, C. I. Torrie, John Veitch, A. Heptonstall, M. Malec, Jordan Camp, J. Dalrymple, M. Ashley, A. S. Sengupta, Norikatsu Mio, Shinji Miyoki, Jun'ichi Yokoyama, J. Allen, N. Hepler, Akira Okutomi, Phil Willems, D. M. Strom, A. Yamamoto, Jolien D. E. Creighton, Lindy Blackburn, Matthew Evans, L. Cardenas, Yi Pan, Takashi Kuwabara, Richard J. K. Taylor, Gianpietro Cagnoli, Shihori Sakata, C. Aulbert, M. MacInnis, Keita Kawabe, R. S. Amin, Chunglee Kim, Seiji Kawamura, Hiroyuki Nakano, Reinhard Prix, Juri Agresti, A. Rizzi, V. Sandberg, K. Rawlins, A. Bunkowski, Shuzo Takemoto, S. Klimenko, Ryutaro Takahashi, W. R. Johnston, Masa-Katsu Fujimoto, Osamu Miyakawa, David H. Reitze, Christian J. Killow, G. Mendell, J. Myers, Shourov Chatterji, Lindon J. Robison, Helena Armandula, E. J. Elliffe, Suvadeep Bose, A. Ageev, Daisuke Tatsumi, A. Wilson, Kazuyuki Miura, Roy Williams, Kenji Soida, K. S. Ganezer, J. S. Noel, Hiromi Mizusawa, Namio Matsuda, J. Castiglione, Lisa M. Goggin, D. Rose, Hideki Asada, Jan Harms, K. Watts, T. Summerscales, Michael Landry, Roman Schnabel, C. A. Shapiro, Masaru Shibata, Stefan Goßler, K. T. Reilly, Toru Tanji, T. Nakamura, B. F. Whiting, David H. Shoemaker, V. Re, Y. Ogawa, Norihiko Kamikubota, Y. Hefetz, Gerhard Heinzel, C. Hardham, M. R. Smith, Masatake Ohashi, H. Overmier, Robert J. McCarthy, Linqing Wen, Shuichi Sato, Joseph D. Romano, C. King, Shoken M. Miyama, Kasem Mossavi, P. Charlton, A. Di Credico, I. A. Bilenko, V. Dergachev, Ian Taylor, David J. Ottaway, Laura Cadonati, G. Billingsley, D. Sellers, Amber Stuver, Sanichiro Yoshida, A. Ivanov, Y. Saito, J. E. Brau, Subhasish Mitra, D. Churches, P. G. Murray, J. H. Hough, C. Parameswariah, J. Langdale, G. P. Newton, M. Fyffe, Sandra E. Wiley, Gabriela Gonzalez, M. Hrynevych, Peter H. Sneddon, Graham Woan, Zong Hong Zhu, Robert L. Byer, Stuart Reid, Kevin C. Schlaufman, Scott Koranda, Akitoshi Ueda, A. Gillespie, Susan M. Scott, Teviet Creighton, Herbert Welling, F. Mann, Rainer Weiss, Kiminori Kondo, Herbert Walther, Benno Willke, R. W. P. Drever, Nergis Mavalvala, H. Radkins, R. L. Savage, L. Ruet, S. P. Vyachanin, M. Coles, L. Matone, M. Guenther, Yasufumi Kojima, E. Rotthoff, Misao Sasaki, Naoko Ohishi, B. C. Barish, Takaharu Kaneyama, M. Rakhmanov, Michael D. Smith, Bernard F. Schutz, Chad Hanna, G. Stapfer, J. Hanson, C. Torres, A. Rodriguez, S. Meshkov, C. Barker, X. Siemens, K. Kötter, Douglas R. Cook, Michael E Zucker, W. Tyler, Michele Zanolin, S. Seel, C. Wilkinson, G. H. Sanders, R. Lawrence, Mitsuru Musha, W. W. Johnson, B. Johnson, S. Nagano, R. L. Ward, K. D. Zaleski, D. Redding, J. Garofoli, Alessandra Buonanno, R. DeSalvo, Patrick Brady, C. A. Cantley, A. Sibley, Raymond G. Beausoleil, R. Balasubramanian, Ryuichi Fujita, I. Leonor, John K. Cannizzo, C. Robinson, Benjamin William Allen, Alberto Vecchio, M. A. Barton, Rana X. Adhikari, Yoshitaka Nagayama, Guido Mueller, Gareth Jones, B. Machenschalk, R. Rahkola, Pankaj Sarin, Karsten Danzmann, M. C. Sumner, B. Lantz, J. Chapsky, H. Yamamoto, Hideo Iguchi, Tatsuru Yoshida, P. Hoang, Manuel Luna, J. H. Romie, K. Bayer, F. Nocera, F. J. Raab, D.B. DeBra, T. Etzel, K. Y. Franzen, Keisuke Goda, Gavin Davies, Marco G. Tarallo, I. Salzman, D. Farnham, D. Steussy, B. Sears, Akito Araya, V. Schmidt, R. M. S. Schofield, David Jones, Hideaki Kudoh, Benjamin J. Owen, A. M. Gretarsson, Tomiyoshi Haruyama, W. O. Hamilton, R. Gustafson, Erik Katsavounidis, Eugeniy E. Mikhailov, B. J. Cusack, M. Hammond, Kimio Tsubono, Vicky Kalogera, J. Kern, Jeffrey A. Edlund, E. J. Daw, M. J. Lubinski, William E. Butler, D. B. Kozak, E. Myers, K. V. Tokmakov, Takayuki Tomaru, E. Messaritaki, S. Killbourn, Martin Hewitson, Koji Arai, R. Burgess, Daniel C. Woods, B. Rivera, D. Webber, Peter R. Saulson, Hisa-aki Shinkai, L. Jones, M. Lormand, H. Ding, R. Abbott, M. Fine, V. Quetschke, Sheila Rowan, James Whelan, P. Ajith, C. Vorvick, Takashi Uchiyama, Kunihito Ioka, M. Mageswaran, Peter Fritschel, S. Penn, Masao Tokunari, Vladimir B. Braginsky, K. Reithmaier, Andreas Freise, S. R. Rao, Robert Bennett, A. Libson, Marco Aurelio Diaz, D. I. Robertson, Erika D'Ambrosio, Pamela J. Russell, Souichi Telada, Junwei Cao, K. Riles, Martin P McHugh, M. H. P. M. van Putten, S. Tilav, Matthew Pitkin, J. Heefner, Toshitaka Yamazaki, Mayu Katsuki, P. Schwinberg, Yoshihide Kozai, Bangalore Suryanarayana Sathyaprakash, E. Black, Martin M. Fejer, Hideyuki Tagoshi, J. R. Smith, R. Bork, T. Nash, K. C. Cannon, J. Zweizig, R. Wooley, Kazuhiro Hayama, A. Sazonov, J. Mason, Ken-ichi Nakao, W. G. Anderson, K. Oohara, E. Maros, Peter Shawhan, S. Richman, M. Tibbits, B. P. Abbott, Yousuke Itoh, Oliver Jennrich, K. A. Thorne, J. Betzwieser, Kazuaki Kuroda, Koichi Waseda, N. Sato, M. Kawamura, S. Wen, A. Bullington, Michele Vallisneri, I. Zawischa, Robert Spero, Soumya D. Mohanty, Fumiko Kawazoe, D. Ugolini, Carsten Fallnich, Stefan Hild, S. Vass, L. Bogue, A. J. Weinstein, Ik Siong Heng, Shantanu Desai, J. W C McNabb, W. Wu, P. T. Beyersdorf, N. Zotov, W. Kells, Soma Mukherjee, Taketoshi Kasai, K. Mason, Sanjeev Dhurandhar, Kip S. Thorne, Badri Krishnan, Shigemi Otsuka, S. Ray-Majumder, D. Busby, Curt Cutler, T. Findley, C. Gray, Kentaro Somiya, Naoki Seto, D. Ouimette, M. C. Araya, Antony C. Searle, V. V. Frolov, Kevin M. Carter, Frank Seifert, C. N. Colacino, S. B. Anderson, A. Grant, S. Liu, V. Parameshwaraiah, L. Zhang, V. P. Mitrofanov, G. Traylor, Kenji Numata, Masaki Ando, Thomas Corbitt, Akiteru Takamori, Yusaku Hamuro, Joseph M. Kovalik, D. Chin, Stanislav Babak, Walid A. Majid, Yi Chen, M. Hennessy, Q. Z. Shu, David B. Tanner, M. W. Regehr, M. Sung, Duncan A. Brown, S. Wise, S. Grunewald, Brent Ware, Kouichi Sato, M. Pedraza, Maria Alessandra Papa, T. Akutsu, Kenneth G. Libbrecht, Kent Blackburn, N. A. Robertson, Carlo Ungarelli, Walter Winkler, Morag M. Casey, Harald Lück, P. R. Williams, M. Heurs, Toshikazu Suzuki, B. J. Winjum, A. Marin, Yoshio Nishi, A. C. Melissinos, B. Bochner, Massimo Tinto, David Crooks, Philippe Grandclément, P. J. Sutton, Haisheng Rong, Kazuhiro Yamamoto, N. Hindman, Toshifumi Futamase, P. Ehrens, K. Wette, Timothy Evans, R. Coldwell, D. Sigg, S. W. Ballmer, Y. Tsunesada, G. Moreno, J. Logan, R. K. Nayak, Yoshikazu Karasawa, R. J. Dupuis, Youhei Sato, H. Tariq, Shigenori Moriwaki, Vuk Mandic, Ken-ichi Ueda, J. A. Giaime, Katsuaki Kasahara, Eric K. Gustafson, T. T. Lyons, Albert Lazzarini, J. G. Rollins, T. Delker, F. Asiri, S. E. Whitcomb, Adrian C. Ottewill, K. Mailand, Krzysztof Belczynski, R. Mittleman, Kohei Takeno, B. Bland, Nelson Christensen, U. Weiland, Takahiro Tanaka, S. E. Seader, A. Hartunian, Stephen Fairhurst, O. Matherny, B. Barr, J. Worden, A. Rüdiger, Youhei Fujiki, R. Riesen, Roland Schilling, Nobuhiro Tsuda, Gregory M. Harry, M. Lei, I. Yakushin, Hirotaka Takahashi, T. Olson, Keisuke Taniguchi, Guenakh Mitselmakher, A. Khan, Virginio Sannibale, David E. McClelland, O. Spjeld, R. Zhu, Mitsuhiro Fukushima, C. Messenger, W. Hua, L. Sievers, Thomas Cokelaer, Yuriko Yanagi, Aya Sekido, Hideki Ishizuka, D. Barker, S. Chelkowski, S. Roddy, A. M. Sintes, Lee Samuel Finn, M. Barnes, Julien Sylvestre, Yoichi Aso, L. Wallace, R. Frey, S. Márka, Takakazu Shintomi, P. J. King, D. Grimmett, Philip Nutzman, Kenneth A. Strain, A. G. Wiseman, D. C. Coyne, A. Weidner, R. A. Mercer, B. O'Reilly, P. Csatorday, M. V. Plissi, Nobuyuki Kanda, Hartmut Grote, Yukiyoshi Iida, D. Jungwirth, P. E. Lindquist, Peter Aufmuth, V. Chickarmane, B. Bhawal, S. J. Berukoff, Keiko Kokeyama, M. Ito, The LIGO Scientific Collaboration, and TAMA Collaboration

Subjects
Nuclear and High Energy Physics, noise, Frequency band, FOS: Physical sciences, Astrophysics, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, General Relativity and Quantum Cosmology, Coincidence, gravitational wave detectors, Coincident, 0103 physical sciences, black-hole coalescences, ddc:530, 010303 astronomy & astrophysics, QC, Physics, 010308 nuclear & particles physics, Gravitational wave, Bandwidth (signal processing), Detector, LIGO, Amplitude, gravitational waves, light interferometry, network, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik
Abstract

We report on the first joint search for gravitational waves by the TAMA and LIGO collaborations. We looked for millisecond-duration unmodelled gravitational-wave bursts in 473 hr of coincident data collected during early 2003. No candidate signals were found. We set an upper limit of 0.12 events per day on the rate of detectable gravitational-wave bursts, at 90% confidence level. From simulations, we estimate that our detector network was sensitive to bursts with root-sum-square strain amplitude above approximately 1-3x10^{-19} Hz^{-1/2} in the frequency band 700-2000 Hz. We describe the details of this collaborative search, with particular emphasis on its advantages and disadvantages compared to searches by LIGO and TAMA separately using the same data. Benefits include a lower background and longer observation time, at some cost in sensitivity and bandwidth. We also demonstrate techniques for performing coincidence searches with a heterogeneous network of detectors with different noise spectra and orientations. These techniques include using coordinated signal injections to estimate the network sensitivity, and tuning the analysis to maximize the sensitivity and the livetime, subject to constraints on the background., Comment: 15 pages, 11 figures, to be submitted to Phys Rev D. Updated author list

Published
2005

16. Experimental investigation on focusing characteristics of a He-Ne laser using circular Fresnel zone plate for high-precision alignment of linear accelerators

Author

Masanori Satoh, Kaoru Minoshima, Souichi Telada, and Tsuyoshi Suwada

Subjects
Physics, Focal point, Fresnel zone, business.industry, Fresnel zone antenna, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Physics::Optics, Zone plate, Laser, Displacement (vector), law.invention, Optics, law, Focal length, Physics::Atomic Physics, business, Instrumentation
Abstract

We experimentally investigate the focusing characteristics of a He-Ne laser at the focal region for the high-precision alignment of long-distance linear accelerators using a circular Fresnel zone plate. The laser wave passing through the Fresnel zone plate having a focal length of 66.7 m propagates for a 268-m-long distance at atmospheric pressure. A new laser-based alignment system using Fresnel zone plates as the alignment targets is discussed. The transverse displacement of the focused spot of the laser is measured as a function of the displacement of the target by a detector installed at the focal point. Systematic studies on the focusing characteristics and alignment precision have been successfully conducted in this experiment. The experimental results are in good agreement with theoretical calculations, and the alignment precision of the target is determined to be less than ±30 μm. In this study, we perform a detailed experimental investigation on the laser propagation and focusing characteristics using the circular Fresnel zone plate at the focal region along with theoretical calculations.

Published
2012
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17. First search for gravitational waves from inspiraling compact binaries using TAMA300 data

Author

Ryutaro Takahashi, Daisuke Tatsumi, Yoshio Saito, Souichi Telada, Mitsuru Musha, Akitoshi Ueda, Shigeo Nagano, Seiji Kawamura, Shoken M. Miyama, Yuko Watanabe, Shigemi Otsuka, M. A. Barton, Osamu Miyakawa, Koji Arai, Nobuki Kawashima, Shuichi Sato, Takashi Nakamura, Yujiro Ogawa, A. Araya, Gerhard Heinzel, Ken-ichi Nakao, Kentaro Somiya, Masa Katsu Fujimoto, Koichi Waseda, Takayuki Tomaru, Akira Okutomi, Namio Matsuda, Kenji Numata, Masaki Ando, Hideki Asada, Yoshihide Kozai, Hideyuki Tagoshi, Ke N.Ichi Nakagawa, Kimio Tsubono, Atsushi Sekiya, Takashi Uchiyama, Eiichi Mizuno, Shigenori Moriwaki, K. Oohara, Shinji Miyoki, Takahiro Tanaka, Keita Kawabe, Hiromi Yakura, M. Fukushima, Ken-ichi Ueda, N. Ohishi, Ge N.Ichi Horikoshi, A. Takamori, Sumihiro Matsumura, Norihiko Kamikubota, Masaru Shibata, Toshikazu Suzuki, Kozo Ueda, Misao Sasaki, Kazuhiro Yamamoto, Kazuaki Kuroda, Nobuhiro Tsuda, Nobuyuki Kanda, Norikatsu Mio, Kuniharu Tochikubo, Yasufumi Kojima, M. Ohashi, Satoshi Miki, Hideki Ishizuka, Toshifumi Futamase, T. Yamazaki, Shinsuke Taniguchi, and Kazumichi Shirakata

Subjects
Physics, Nuclear and High Energy Physics, Gravitational-wave observatory, Gravitational wave, media_common.quotation_subject, Detector, Astrophysics (astro-ph), Astronomy, Binary number, FOS: Physical sciences, Astrophysics, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology, Position (vector), Sky, Event (particle physics), Gravitational redshift, media_common
Abstract

We analyzed 6 hours of data from the TAMA300 detector by matched filtering, searching for gravitational waves from inspiraling compact binaries. We incorporated a two-step hierarchical search strategy in matched filtering. We obtained an upper limit of 0.59/hour (C.L.=90%) on the event rate of inspirals of compact binaries with mass between 0.3M_solar and 10M_solar and with signal-to-noise ratio greater than 7.2. The distance of 1.4M_solar (0.5M_solar) binaries which produce the signal-to-noise ratio 7.2 was estimated to be 6.2kpc (2.9kpc) when the position of the source on the sky and the inclination angle of the binaries were optimal., Comment: 5 pages, 4 figures. To appear Phsical Review D

Published
2001

18. Optical mode cleaner with suspended mirrors

Author

Akito Araya, Koya Suehiro, Kimio Tsubono, Masatake Ohashi, Souichi Telada, Masa-Katsu Fujimoto, and Norikatsu Mio

Subjects
Physics, Physics::Instrumentation and Detectors, business.industry, Materials Science (miscellaneous), Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Mode (statistics), Physics::Optics, Laser, Industrial and Manufacturing Engineering, law.invention, Interferometry, Optics, Observatory, law, Phase noise, Physics::Accelerator Physics, Business and International Management, business, Noise (radio), Beam (structure)
Abstract

We report on the development of a new type of mode cleaner that reduces any geometric noise of the laser beam in an interferometric gravitational-wave detector. The mode cleaner is a Fabry-Perot cavity that comprises independently suspended mirrors and works as a frequency-stabilization reference as well as a mode selector; the length of the cavity is 1 m. Stand-alone tests have shown at least a 30-dB reduction in the geometric fluctuation of the beam and a 60-dB reduction of the frequency noise of the laser. We have also succeeded in operating a 20-m Fabry-Perot prototype detector (at the National Astronomical Observatory, Tokyo, Japan) by using this mode cleaner.

Published
1997
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