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

T. Akutsu; M. Ando; K. Arai; Y. Arai; S. Araki; A. Araya; N. Aritomi; Y. Aso; S. W. Bae; Y. B. Bae; L. Baiotti; R. Bajpai; M. A. Barton; K. Cannon; E. Capocasa; M. L. Chan; C. S. Chen; K. H. Chen; Y. R. Chen; H. Y. Chu; Y. K. Chu; S. Eguchi; Y. Enomoto; R. Flaminio; Y. Fujii; M. Fukunaga; M. Fukushima; G. G. Ge; A. Hagiwara; S. Haino; K. Hasegawa; H. Hayakawa; K. Hayama; Y. Himemoto; Y. Hiranuma; N. Hirata; E. Hirose; Z. Hong; B. H. Hsieh; G. Z. Huang; P. W. Huang; Y. J. Huang; B. Ikenoue; S. Imam; K. Inayoshi; Y. Inoue; K. Ioka; Y. Itoh; K. Izumi; K. Jung; P. Jung; T. Kajita; M. Kamiizumi; N. Kanda; G. W. Kang; K. Kawaguchi; N. Kawai; T. Kawasaki; C. Kim; J. Kim; W. Kim; Y. M. Kim; N. Kimura; N. Kita; H. Kitazawa; Y. Kojima; K. Kokeyama; K. Komori; A. K.H. Kong; K. Kotake; C. Kozakai; R. Kozu; R. Kumar; J. Kume; C. M. Kuo; H. S. Kuo; S. Kuroyanagi; K. Kusayanagi; K. Kwak; H. K. Lee; H. W. Lee; R. K. Lee; M. Leonardi; C. Y. Lin; F. L. Lin; L. C.C. Lin; G. C. Liu; L. W. Luo; M. Marchio; Y. Michimura; N. Mio; O. Miyakawa; A. Miyamoto; Y. Miyazaki; K. Miyo; S. Miyoki; S. Morisaki; Y. Moriwaki; K. Nagano; S. Nagano; K. Nakamura; H. Nakano; M. Nakano; R. Nakashima; T. Narikawa; R. Negishi; W. T. Ni; A. Nishizawa; Y. Obuchi; W. Ogaki; J. J. Oh; S. H. Oh; M. Ohashi; N. Ohishi; M. Ohkawa; K. Okutomi; K. Oohara; C. P. Ooi; S. Oshino; K. C. Pan; H. F. Pang; J. Park; F. E. Peiia Arellano; I. Pinto; N. Sago; S. Saito; Y. Saito; K. Sakai; Y. Sakai; Y. Sakuno; S. Sato; T. Sato; T. Sawada; T. Sekiguchi; Y. Sekiguchi; S. Shibagaki; R. Shimizu; T. Shimoda; K. Shimode; H. Shinkai; T. Shishido; A. Shoda; K. Somiya; E. J. Son; H. Sotani; R. Sugimoto; T. Suzuki; T. Suzuki; H. Tagoshi; H. Takahashi; R. Takahashi; A. Takamori; S. Takano; H. Takeda; M. Takeda; H. Tanaka; K. Tanaka; K. Tanaka; T. Tanaka; T. Tanaka; S. Tanioka; E. N. Tapia San Martin; S. Telada; T. Tomaru; Y. Tomigami; T. Tomura; F. Travasso; L. Trozzo; T. T.L. Tsang; K. Tsubono; S. Tsuchida; T. Tsuzuki; D. Tuyenbayev; N. Uchikata; T. Uchiyama; A. Ueda; T. Uehara; K. Ueno; G. Ueshima; F. Uraguchi; T. Ushiba; M. H.P.M.Van Putten; H. Vocca; J. Wang; C. M. Wu; H. C. Wu; S. R. Wu; W. R. Xu; T. Yamada; K. Yamamoto; K. Yamamoto; T. Yamamoto; K. Yokogawa; J. Yokoyama; T. Yokozawa; T. Yoshioka; H. Yuzurihara; S. Zeidler; Y. Zhao; Z. H. Zhu

doi:10.1088/1742-6596/1857/1/012002

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

T. Akutsu^*, M. Ando, K. Arai, Y. Arai, S. Araki, A. Araya, N. Aritomi, Y. Aso, S. W. Bae, Y. B. Bae, L. Baiotti, R. Bajpai, M. A. Barton, K. Cannon, E. Capocasa, M. L. Chan, C. S. Chen, K. H. Chen, Y. R. Chen, H. Y. ChuY. K. Chu, S. Eguchi, Y. Enomoto, R. Flaminio, Y. Fujii, M. Fukunaga, M. Fukushima, G. G. Ge, A. Hagiwara, S. Haino, K. Hasegawa, H. Hayakawa, K. Hayama, Y. Himemoto, Y. Hiranuma, N. Hirata, E. Hirose, Z. Hong, B. H. Hsieh, G. Z. Huang, P. W. Huang, Y. J. Huang, B. Ikenoue, S. Imam, K. Inayoshi, Y. Inoue, K. Ioka, Y. Itoh, K. Izumi, K. Jung, P. Jung, T. Kajita, M. Kamiizumi, N. Kanda, G. W. Kang, K. Kawaguchi, N. Kawai, T. Kawasaki, C. Kim, J. Kim, W. Kim, Y. M. Kim, N. Kimura, N. Kita, H. Kitazawa, Y. Kojima, K. Kokeyama, K. Komori, A. K.H. Kong, K. Kotake, C. Kozakai, R. Kozu, R. Kumar, J. Kume, C. M. Kuo, H. S. Kuo, S. Kuroyanagi, K. Kusayanagi, K. Kwak, H. K. Lee, H. W. Lee, R. K. Lee, M. Leonardi, C. Y. Lin, F. L. Lin, L. C.C. Lin, G. C. Liu, L. W. Luo, M. Marchio, Y. Michimura, N. Mio, O. Miyakawa, A. Miyamoto, Y. Miyazaki, K. Miyo, S. Miyoki, S. Morisaki, Y. Moriwaki, K. Nagano, S. Nagano, K. Nakamura, H. Nakano, M. Nakano, R. Nakashima, T. Narikawa, R. Negishi, W. T. Ni, A. Nishizawa, Y. Obuchi, W. Ogaki, J. J. Oh, S. H. Oh, M. Ohashi, N. Ohishi, M. Ohkawa, K. Okutomi, K. Oohara, C. P. Ooi, S. Oshino, K. C. Pan, H. F. Pang, J. Park, F. E. Peiia Arellano, I. Pinto, N. Sago, S. Saito, Y. Saito, K. Sakai, Y. Sakai, Y. Sakuno, S. Sato, T. Sato, T. Sawada, T. Sekiguchi, Y. Sekiguchi, S. Shibagaki, R. Shimizu, T. Shimoda, K. Shimode, H. Shinkai, T. Shishido, A. Shoda, K. Somiya, E. J. Son, H. Sotani, R. Sugimoto, T. Suzuki, T. Suzuki, H. Tagoshi, H. Takahashi, R. Takahashi, A. Takamori, S. Takano, H. Takeda, M. Takeda, H. Tanaka, K. Tanaka, K. Tanaka, T. Tanaka, T. Tanaka, S. Tanioka, E. N. Tapia San Martin, S. Telada, T. Tomaru, Y. Tomigami, T. Tomura, F. Travasso, L. Trozzo, T. T.L. Tsang, K. Tsubono, S. Tsuchida, T. Tsuzuki, D. Tuyenbayev, N. Uchikata, T. Uchiyama, A. Ueda, T. Uehara, K. Ueno, G. Ueshima, F. Uraguchi, T. Ushiba, M. H.P.M.Van Putten, H. Vocca, J. Wang, C. M. Wu, H. C. Wu, S. R. Wu, W. R. Xu, T. Yamada, K. Yamamoto, K. Yamamoto, T. Yamamoto, K. Yokogawa, J. Yokoyama, T. Yokozawa, T. Yoshioka, H. Yuzurihara, S. Zeidler, Y. Zhao, Z. H. Zhu

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

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.

Original language	English
Article number	012002
Journal	Journal of Physics: Conference Series
Volume	1857
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/1857/1/012002
Publication status	Published - 2021 Apr 19
Event	10th Asian Conference on Applied Superconductivity and Cryogenics, ACASC 2020, 2nd International Cryogenic Materials Conference in Asia, Asian-ICMC 2020 and CSSJ Joint Conference - Okinawa, Japan Duration: 2020 Jan 6 → 2020 Jan 9

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1088/1742-6596/1857/1/012002

Cite this

Akutsu, T., Ando, M., Arai, K., Arai, Y., Araki, S., Araya, A., Aritomi, N., Aso, Y., Bae, S. W., Bae, Y. B., Baiotti, L., Bajpai, R., Barton, M. A., Cannon, K., Capocasa, E., Chan, M. L., Chen, C. S., Chen, K. H., Chen, Y. R., ... Zhu, Z. H. (2021). Radiative Cooling of the Thermally Isolated System in KAGRA Gravitational Wave Telescope. Journal of Physics: Conference Series, 1857(1), Article 012002. https://doi.org/10.1088/1742-6596/1857/1/012002

Akutsu, T, Ando, M, Arai, K, Arai, Y, Araki, S, Araya, A, Aritomi, N, Aso, Y, Bae, SW, Bae, YB, Baiotti, L, Bajpai, R, Barton, MA, Cannon, K, Capocasa, E, Chan, ML, Chen, CS, Chen, KH, Chen, YR, Chu, HY, Chu, YK, Eguchi, S, Enomoto, Y, Flaminio, R, Fujii, Y, Fukunaga, M, Fukushima, M, Ge, GG, Hagiwara, A, Haino, S, Hasegawa, K, Hayakawa, H, Hayama, K, Himemoto, Y, Hiranuma, Y, Hirata, N, Hirose, E, Hong, Z, Hsieh, BH, Huang, GZ, Huang, PW, Huang, YJ, Ikenoue, B, Imam, S, Inayoshi, K, Inoue, Y, Ioka, K, Itoh, Y, Izumi, K, Jung, K, Jung, P, Kajita, T, Kamiizumi, M, Kanda, N, Kang, GW, Kawaguchi, K, Kawai, N, Kawasaki, T, Kim, C, Kim, J, Kim, W, Kim, YM, Kimura, N, Kita, N, Kitazawa, H, Kojima, Y, Kokeyama, K, Komori, K, Kong, AKH, Kotake, K, Kozakai, C, Kozu, R, Kumar, R, Kume, J, Kuo, CM, Kuo, HS, Kuroyanagi, S, Kusayanagi, K, Kwak, K, Lee, HK, Lee, HW, Lee, RK, Leonardi, M, Lin, CY, Lin, FL, Lin, LCC, Liu, GC, Luo, LW, Marchio, M, Michimura, Y, Mio, N, Miyakawa, O, Miyamoto, A, Miyazaki, Y, Miyo, K, Miyoki, S, Morisaki, S, Moriwaki, Y, Nagano, K, Nagano, S, Nakamura, K, Nakano, H, Nakano, M, Nakashima, R, Narikawa, T, Negishi, R, Ni, WT, Nishizawa, A, Obuchi, Y, Ogaki, W, Oh, JJ, Oh, SH, Ohashi, M, Ohishi, N, Ohkawa, M, Okutomi, K, Oohara, K, Ooi, CP, Oshino, S, Pan, KC, Pang, HF, Park, J, Peiia Arellano, FE, Pinto, I, Sago, N, Saito, S, Saito, Y, Sakai, K, Sakai, Y, Sakuno, Y, Sato, S, Sato, T, Sawada, T, Sekiguchi, T, Sekiguchi, Y, Shibagaki, S, Shimizu, R, Shimoda, T, Shimode, K, Shinkai, H, Shishido, T, Shoda, A, Somiya, K, Son, EJ, Sotani, H, Sugimoto, R, Suzuki, T, Suzuki, T, Tagoshi, H, Takahashi, H, Takahashi, R, Takamori, A, Takano, S, Takeda, H, Takeda, M, Tanaka, H, Tanaka, K, Tanaka, K, Tanaka, T, Tanaka, T, Tanioka, S, Tapia San Martin, EN, Telada, S, Tomaru, T, Tomigami, Y, Tomura, T, Travasso, F, Trozzo, L, Tsang, TTL, Tsubono, K, Tsuchida, S, Tsuzuki, T, Tuyenbayev, D, Uchikata, N, Uchiyama, T, Ueda, A, Uehara, T, Ueno, K, Ueshima, G, Uraguchi, F, Ushiba, T, Putten, MHPMV, Vocca, H, Wang, J, Wu, CM, Wu, HC, Wu, SR, Xu, WR, Yamada, T, Yamamoto, K, Yamamoto, K, Yamamoto, T, Yokogawa, K, Yokoyama, J, Yokozawa, T, Yoshioka, T, Yuzurihara, H, Zeidler, S, Zhao, Y & Zhu, ZH 2021, 'Radiative Cooling of the Thermally Isolated System in KAGRA Gravitational Wave Telescope', Journal of Physics: Conference Series, vol. 1857, no. 1, 012002. https://doi.org/10.1088/1742-6596/1857/1/012002

@article{a8d41e06c0d04a9d8f96359e3f1bcb5d,

title = "Radiative Cooling of the Thermally Isolated System in KAGRA Gravitational Wave Telescope",

abstract = "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.",

author = "T. Akutsu and M. Ando and K. Arai and Y. Arai and S. Araki and A. Araya and N. Aritomi and Y. Aso and Bae, {S. W.} and Bae, {Y. B.} and L. Baiotti and R. Bajpai and Barton, {M. A.} and K. Cannon and E. Capocasa 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 S. Eguchi and Y. Enomoto and R. Flaminio and Y. Fujii and M. Fukunaga and M. Fukushima and Ge, {G. G.} and A. Hagiwara and S. Haino and K. Hasegawa and H. Hayakawa and K. Hayama and Y. Himemoto and Y. Hiranuma and N. Hirata and E. Hirose and Z. Hong and Hsieh, {B. H.} and Huang, {G. Z.} and Huang, {P. W.} and Huang, {Y. J.} and B. Ikenoue and S. Imam and K. Inayoshi and Y. Inoue and K. Ioka and Y. Itoh and K. Izumi and K. Jung and P. Jung and T. Kajita and M. Kamiizumi and N. Kanda and Kang, {G. W.} and K. Kawaguchi and N. Kawai and T. Kawasaki and C. Kim and J. Kim and W. Kim and Kim, {Y. M.} and N. Kimura and N. Kita and H. Kitazawa and Y. Kojima and K. Kokeyama and K. Komori and Kong, {A. K.H.} and K. Kotake and C. Kozakai and R. Kozu and R. Kumar and J. Kume and Kuo, {C. M.} and Kuo, {H. S.} and S. Kuroyanagi and K. Kusayanagi and K. Kwak and Lee, {H. K.} and Lee, {H. W.} and Lee, {R. K.} and M. Leonardi and Lin, {C. Y.} and Lin, {F. L.} and Lin, {L. C.C.} and Liu, {G. C.} and Luo, {L. W.} and M. Marchio and Y. Michimura and N. Mio and O. Miyakawa and A. Miyamoto and Y. Miyazaki and K. Miyo and S. Miyoki and S. Morisaki and Y. Moriwaki and K. Nagano and S. Nagano and K. Nakamura and H. Nakano and M. Nakano and R. Nakashima and T. Narikawa and R. Negishi and Ni, {W. T.} and A. Nishizawa and Y. Obuchi and W. Ogaki and Oh, {J. J.} and Oh, {S. H.} and M. Ohashi and N. Ohishi and M. Ohkawa and K. Okutomi and K. Oohara and Ooi, {C. P.} and S. Oshino and Pan, {K. C.} and Pang, {H. F.} and J. Park and {Peiia Arellano}, {F. E.} and I. Pinto and N. Sago and S. Saito and Y. Saito and K. Sakai and Y. Sakai and Y. Sakuno and S. Sato and T. Sato and T. Sawada and T. Sekiguchi and Y. Sekiguchi and S. Shibagaki and R. Shimizu and T. Shimoda and K. Shimode and H. Shinkai and T. Shishido and A. Shoda and K. Somiya and Son, {E. J.} and H. Sotani and R. Sugimoto and T. Suzuki and T. Suzuki and H. Tagoshi and H. Takahashi and R. Takahashi and A. Takamori and S. Takano and H. Takeda and M. Takeda and H. Tanaka and K. Tanaka and K. Tanaka and T. Tanaka and T. Tanaka and S. Tanioka and {Tapia San Martin}, {E. N.} and S. Telada and T. Tomaru and Y. Tomigami and T. Tomura and F. Travasso and L. Trozzo and Tsang, {T. T.L.} and K. Tsubono and S. Tsuchida and T. Tsuzuki and D. Tuyenbayev and N. Uchikata and T. Uchiyama and A. Ueda and T. Uehara and K. Ueno and G. Ueshima and F. Uraguchi and T. Ushiba and Putten, {M. H.P.M.Van} and H. Vocca and J. Wang and Wu, {C. M.} and Wu, {H. C.} and Wu, {S. R.} and Xu, {W. R.} and T. Yamada and K. Yamamoto and K. Yamamoto and T. Yamamoto and K. Yokogawa and J. Yokoyama and T. Yokozawa and T. Yoshioka and H. Yuzurihara and S. Zeidler and Y. Zhao and Zhu, {Z. H.}",

note = "Publisher Copyright: {\textcopyright} Published under licence by IOP Publishing Ltd.; 10th Asian Conference on Applied Superconductivity and Cryogenics, ACASC 2020, 2nd International Cryogenic Materials Conference in Asia, Asian-ICMC 2020 and CSSJ Joint Conference ; Conference date: 06-01-2020 Through 09-01-2020",

year = "2021",

month = apr,

day = "19",

doi = "10.1088/1742-6596/1857/1/012002",

language = "English",

volume = "1857",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing Ltd.",

number = "1",

}

TY - JOUR

T1 - Radiative Cooling of the Thermally Isolated System in KAGRA Gravitational Wave Telescope

AU - Akutsu, T.

AU - Ando, M.

AU - Arai, K.

AU - Arai, Y.

AU - Araki, S.

AU - Araya, A.

AU - Aritomi, N.

AU - Aso, Y.

AU - Bae, S. W.

AU - Bae, Y. B.

AU - Baiotti, L.

AU - Bajpai, R.

AU - Barton, M. A.

AU - Cannon, K.

AU - Capocasa, E.

AU - Chan, M. L.

AU - Chen, C. S.

AU - Chen, K. H.

AU - Chen, Y. R.

AU - Chu, H. Y.

AU - Chu, Y. K.

AU - Eguchi, S.

AU - Enomoto, Y.

AU - Flaminio, R.

AU - Fujii, Y.

AU - Fukunaga, M.

AU - Fukushima, M.

AU - Ge, G. G.

AU - Hagiwara, A.

AU - Haino, S.

AU - Hasegawa, K.

AU - Hayakawa, H.

AU - Hayama, K.

AU - Himemoto, Y.

AU - Hiranuma, Y.

AU - Hirata, N.

AU - Hirose, E.

AU - Hong, Z.

AU - Hsieh, B. H.

AU - Huang, G. Z.

AU - Huang, P. W.

AU - Huang, Y. J.

AU - Ikenoue, B.

AU - Imam, S.

AU - Inayoshi, K.

AU - Inoue, Y.

AU - Ioka, K.

AU - Itoh, Y.

AU - Izumi, K.

AU - Jung, K.

AU - Jung, P.

AU - Kajita, T.

AU - Kamiizumi, M.

AU - Kanda, N.

AU - Kang, G. W.

AU - Kawaguchi, K.

AU - Kawai, N.

AU - Kawasaki, T.

AU - Kim, C.

AU - Kim, J.

AU - Kim, W.

AU - Kim, Y. M.

AU - Kimura, N.

AU - Kita, N.

AU - Kitazawa, H.

AU - Kojima, Y.

AU - Kokeyama, K.

AU - Komori, K.

AU - Kong, A. K.H.

AU - Kotake, K.

AU - Kozakai, C.

AU - Kozu, R.

AU - Kumar, R.

AU - Kume, J.

AU - Kuo, C. M.

AU - Kuo, H. S.

AU - Kuroyanagi, S.

AU - Kusayanagi, K.

AU - Kwak, K.

AU - Lee, H. K.

AU - Lee, H. W.

AU - Lee, R. K.

AU - Leonardi, M.

AU - Lin, C. Y.

AU - Lin, F. L.

AU - Lin, L. C.C.

AU - Liu, G. C.

AU - Luo, L. W.

AU - Marchio, M.

AU - Michimura, Y.

AU - Mio, N.

AU - Miyakawa, O.

AU - Miyamoto, A.

AU - Miyazaki, Y.

AU - Miyo, K.

AU - Miyoki, S.

AU - Morisaki, S.

AU - Moriwaki, Y.

AU - Nagano, K.

AU - Nagano, S.

AU - Nakamura, K.

AU - Nakano, H.

AU - Nakano, M.

AU - Nakashima, R.

AU - Narikawa, T.

AU - Negishi, R.

AU - Ni, W. T.

AU - Nishizawa, A.

AU - Obuchi, Y.

AU - Ogaki, W.

AU - Oh, J. J.

AU - Oh, S. H.

AU - Ohashi, M.

AU - Ohishi, N.

AU - Ohkawa, M.

AU - Okutomi, K.

AU - Oohara, K.

AU - Ooi, C. P.

AU - Oshino, S.

AU - Pan, K. C.

AU - Pang, H. F.

AU - Park, J.

AU - Peiia Arellano, F. E.

AU - Pinto, I.

AU - Sago, N.

AU - Saito, S.

AU - Saito, Y.

AU - Sakai, K.

AU - Sakai, Y.

AU - Sakuno, Y.

AU - Sato, S.

AU - Sato, T.

AU - Sawada, T.

AU - Sekiguchi, T.

AU - Sekiguchi, Y.

AU - Shibagaki, S.

AU - Shimizu, R.

AU - Shimoda, T.

AU - Shimode, K.

AU - Shinkai, H.

AU - Shishido, T.

AU - Shoda, A.

AU - Somiya, K.

AU - Son, E. J.

AU - Sotani, H.

AU - Sugimoto, R.

AU - Suzuki, T.

AU - Tagoshi, H.

AU - Takahashi, H.

AU - Takahashi, R.

AU - Takamori, A.

AU - Takano, S.

AU - Takeda, H.

AU - Takeda, M.

AU - Tanaka, H.

AU - Tanaka, K.

AU - Tanaka, T.

AU - Tanioka, S.

AU - Tapia San Martin, E. N.

AU - Telada, S.

AU - Tomaru, T.

AU - Tomigami, Y.

AU - Tomura, T.

AU - Travasso, F.

AU - Trozzo, L.

AU - Tsang, T. T.L.

AU - Tsubono, K.

AU - Tsuchida, S.

AU - Tsuzuki, T.

AU - Tuyenbayev, D.

AU - Uchikata, N.

AU - Uchiyama, T.

AU - Ueda, A.

AU - Uehara, T.

AU - Ueno, K.

AU - Ueshima, G.

AU - Uraguchi, F.

AU - Ushiba, T.

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

AU - Vocca, H.

AU - Wang, J.

AU - Wu, C. M.

AU - Wu, H. C.

AU - Wu, S. R.

AU - Xu, W. R.

AU - Yamada, T.

AU - Yamamoto, K.

AU - Yamamoto, T.

AU - Yokogawa, K.

AU - Yokoyama, J.

AU - Yokozawa, T.

AU - Yoshioka, T.

AU - Yuzurihara, H.

AU - Zeidler, S.

AU - Zhao, Y.

AU - Zhu, Z. H.

PY - 2021/4/19

Y1 - 2021/4/19

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85104878570&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85104878570&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/1857/1/012002

DO - 10.1088/1742-6596/1857/1/012002

M3 - Conference article

AN - SCOPUS:85104878570

SN - 1742-6588

VL - 1857

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012002

T2 - 10th Asian Conference on Applied Superconductivity and Cryogenics, ACASC 2020, 2nd International Cryogenic Materials Conference in Asia, Asian-ICMC 2020 and CSSJ Joint Conference

Y2 - 6 January 2020 through 9 January 2020

ER -

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

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