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 in 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 brings small seismic motion at low frequencies and high 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 have operated a 3-km Michelson interferometer with a cryogenic test mass for 10 days, 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.
Keywords
Cite
@article{arxiv.1901.03569,
title = {First cryogenic test operation of underground km-scale gravitational-wave observatory KAGRA},
author = {KAGRA Collaboration and 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 M. A. Barton and K. Cannon and E. Capocasa and C-S. Chen and T-W. Chiu and K. Cho and Y-K. Chu and K. Craig and W. Creus and K. Doi and K. Eda and Y. Enomoto and R. Flaminio and Y. Fujii and M. -K. Fujimoto 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 B. H. Hsieh and C-Z. Huang 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 J. C. Kim and W. S. Kim and Y. -M. Kim 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 A. K. H. Kong and K. Kotake and R. Kozu and R. Kumar and H-S. Kuo and S. Kuroyanagi and H. K. Lee and H. M. Lee and H. W. Lee and M. Leonardi and C-Y. Lin and F-L. Lin and G. C. Liu 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 L. Nguyen Quynh and W. -T. Ni and A. Nishizawa and Y. Obuchi and T. Ochi and J. J. Oh and S. H. Oh and M. Ohashi and N. Ohishi and M. Ohkawa and K. Okutomi and K. Ono and K. Oohara and C. P. Ooi and S-S. Pan and J. Park and F. E. Peña Arellano 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 E. J. Son 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 E. N. Tapia San Martin 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 M. H. P. M. van Putten and H. Vocca and S. Wada and T. Wakamatsu and Y. Watanabe and W-R. Xu 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 T. H. Yoon and T. Yoshioka and H. Yuzurihara and S. Zeidler and Z. -H. Zhu},
journal= {arXiv preprint arXiv:1901.03569},
year = {2019}
}
Comments
23 pages, 11 figures