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Radiative Cooling of the Thermally Isolated System in KAGRA Gravitational Wave Telescope

Akutsu, T. and Ando, M. and Arai, K. and Arai, Y. and Araki, S. and Araya, A. and Aritomi, N. and Aso, Y. and Bae, S.-W. and Bae, Y.-B. and Baiotti, L. and Bajpai, R. and Barton, M. A. and Cannon, K. and Capocasa, E. and Chan, M.-L. and Chen, C.-S. and Chen, K.-H. and Chen, Y.-R. and Chu, H.-Y. and Chu, Y.-K. and Eguchi, S. and Enomoto, Y. and Flaminio, R. and Fujii, Y. and Fukunaga, M. and Fukushima, M. and Ge, G.-G. and Hagiwara, A. and Haino, S. and Hasegawa, K. and Hayakawa, H. and Hayama, K. and Himemoto, Y. and Hiranuma, Y. and Hirata, N. and Hirose, E. and Hong, Z. and Hsieh, B.-H. and Huang, G.-Z. and Huang, P.-W. and Huang, Y.-J. and Ikenoue, B. and Imam, S. and Inayoshi, K. and Inoue, Y. and Ioka, K. and Itoh, Y. and Izumi, K. and Jung, K. and Jung, P. and Kajita, T. and Kamiizumi, M. and Kanda, N. and Kang, G.-W. and Kawaguchi, K. and Kawai, N. and Kawasaki, T. and Kim, C. and Kim, J. and Kim, W. and Kim, Y.-M. and Kimura, N. and Kita, N. and Kitazawa, H. and Kojima, Y. and Kokeyama, K. and Komori, K. and Kong, A. K. H. and Kotake, K. and Kozakai, C. and Kozu, R. and Kumar, R. and Kume, J. and Kuo, C.-M. and Kuo, H.-S. and Kuroyanagi, S. and Kusayanagi, K. and Kwak, K. and Lee, H.-K. and Lee, H.-W. and Lee, R.-K. and Leonardi, M. and Lin, C.-Y. and Lin, F.-L. and Lin, L. C.-C. and Liu, G.-C. and Luo, L.-W. and Marchio, M. and Michimura, Y. and Mio, N. and Miyakawa, O. and Miyamoto, A. and Miyazaki, Y. and Miyo, K. and Miyoki, S. and Morisaki, S. and Moriwaki, Y. and Nagano, K. and Nagano, S. and Nakamura, K. and Nakano, H. and Nakano, M. and Nakashima, R. and Narikawa, T. and Negishi, R. and Ni, W.-T. and Nishizawa, A. and Obuchi, Y. and Ogaki, W. and Oh, J. J. and Oh, S.-H. and Ohashi, M. and Ohishi, N. and Ohkawa, M. and Okutomi, K. and Oohara, K. and Ooi, C.-P. and Oshino, S. and Pan, K.-C. and Pang, H.-F. and Park, J. and Peiia Arellano, F. E. and Pinto, I. and Sago, N. and Saito, S. and Saito, Y. and Sakai, K. and Sakai, Y. and Sakuno, Y. and Sato, S. and Sato, T. and Sawada, T. and Sekiguchi, T. and Sekiguchi, Y. and Shibagaki, S. and Shimizu, R. and Shimoda, T. and Shimode, K. and Shinkai, H. and Shishido, T. and Shoda, A. and Somiya, K. and Son, E. J. and Sotani, H. and Sugimoto, R. and Suzuki, T. and Suzuki, T. and Tagoshi, H. and Takahashi, H. and Takahashi, R. and Takamori, A. and Takano, S. and Takeda, H. and Takeda, M. and Tanaka, H. and Tanaka, K. and Tanaka, K. and Tanaka, T. and Tanaka, T. and Tanioka, S. and Tapia San Martin, E. N. and Telada, S. and Tomaru, T. and Tomigami, Y. and Tomura, T. and Travasso, F. and Trozzo, L. and Tsang, T. T. L. and Tsubono, K. and Tsuchida, S. and Tsuzuki, T. and Tuyenbayev, D. and Uchikata, N. and Uchiyama, T. and Ueda, A. and Uehara, T. and Ueno, K. and Ueshima, G. and Uraguchi, F. and Ushiba, T. and van Putten, M. H. P. M. and Vocca, H. and Wang, J. and Wu, C.-M. and Wu, H.-C. and Wu, S.-R. and Xu, W.-R. and Yamada, T. and Yamamoto, K. and Yamamoto, K. and Yamamoto, T. and Yokogawa, K. and Yokoyama, J. and Yokozawa, T. and Yoshioka, T. and Yuzurihara, H. and Zeidler, S. and Zhao, Y. and Zhu, Z.-H. (2021) Radiative Cooling of the Thermally Isolated System in KAGRA Gravitational Wave Telescope. Journal of Physics Conference Series, 1857 (1). Art. No. 012002. ISSN 1742-6588. doi:10.1088/1742-6596/1857/1/012002.

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Radiative cooling of the thermally isolated system is investigated in KAGRA gravitational wave telescope. KAGRA is a laser interferometer-based detector and main mirrors constituting optical cavities are cool down to 20K to reduce noises caused by the thermal fluctuation. The mirror is suspended with the multi-stage pendulum to isolate any vibration. Therefore, this mirror suspension system has few heat links to reduce vibration injection. Thus, this system is mainly cooled down with thermal radiation. In order to understand the process of radiative cooling of the mirror, we analyzed cooling curve based on mass and specific heat. As a result, it was newly found that a cryogenic part called "cryogenic duct-shield" seems to have large contribution in the beginning of the mirror cooling. This finding will help to design new cooling system for the next generation cryogenic gravitational wave detector.

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Akutsu, T.0000-0003-0733-7530
Additional Information:© 2021 The Author(s). Published under licence by IOP Publishing Ltd. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. This work was supported by MEXT, JSPS Leading-edge Research Infrastructure Program, JSPS Grant-in-Aid for Specially Promoted Research 26000005, JSPS Grant-in-Aid for Scientific Research on Innovative Areas 2905: JP17H06358, JP17H06361 and JP17H06364, JSPS Core-to-Core Program A. Advanced Research Networks, JSPS Grant-in-Aid for Scientific Research (S) 17H06133, the joint research program of the Institute for Cosmic Ray Research, University of Tokyo, National Research Foundation (NRF) and Computing Infrastructure Project of KISTI-GSDC in Korea, Academia Sinica (AS), AS Grid Center (ASGC) and the Ministry of Science and Technology (MoST) in Taiwan under grants including AS-CDA-105-M06, the LIGO project, and the Virgo project.
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Ministry of Education, Culture, Sports, Science and Technology (MEXT)UNSPECIFIED
Japan Society for the Promotion of Science (JSPS)26000005
Japan Society for the Promotion of Science (JSPS)JP17H06358
Japan Society for the Promotion of Science (JSPS)JP17H06361
Japan Society for the Promotion of Science (JSPS)JP17H06364
Japan Society for the Promotion of Science (JSPS)17H06133
Ministry of Science and Technology (Taipei)AS-CDA-105-M06
Issue or Number:1
Record Number:CaltechAUTHORS:20210423-164856092
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Official Citation:T. Akutsu et al 2021 J. Phys.: Conf. Ser. 1857 012002
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108832
Deposited By: George Porter
Deposited On:28 Apr 2021 16:49
Last Modified:12 Jul 2022 19:41

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