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

Akutsu, T. and Kumar, R. (2019) First cryogenic test operation of underground km-scale gravitational-wave observatory KAGRA. Classical and Quantum Gravity, 36 (16). Art. No. 165008. ISSN 0264-9381. https://resolver.caltech.edu/CaltechAUTHORS:20190723-105014258

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1088/1361-6382/ab28a9DOIArticle
https://arxiv.org/abs/1901.03569arXivDiscussion Paper
ORCID:
AuthorORCID
Akutsu, T.0000-0003-0733-7530
Additional Information:© 2019 IOP Publishing Ltd. Received 11 January 2019; Accepted 11 June 2019; Published 23 July 2019. We would like to thank the Advanced Technology Center (ATC) of NAOJ, the Mechanical Engineering Center of KEK, and the machine shop of the Institute of Solid State Physics (ISSP) of the University of Tokyo for technical support. 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. This paper carries JGW Document Number JGW-P1809289.
Group:LIGO
Funders:
Funding AgencyGrant Number
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
University of TokyoUNSPECIFIED
National Research Foundation of KoreaUNSPECIFIED
Academia SinicaUNSPECIFIED
AS Grid Center (ASGC)UNSPECIFIED
Ministry of Science and Technology (Taipei)AS-CDA-105-M06
LIGOUNSPECIFIED
Virgo ProjectUNSPECIFIED
Issue or Number:16
Record Number:CaltechAUTHORS:20190723-105014258
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190723-105014258
Official Citation: Akutsu et al 2019 Class. Quantum Grav. 36 165008
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97354
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:23 Jul 2019 20:42
Last Modified:03 Oct 2019 21:30

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