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KAGRA: 2.5 generation interferometric gravitational wave detector

Akutsu, T. and Kumar, R. (2019) KAGRA: 2.5 generation interferometric gravitational wave detector. Nature Astronomy, 3 (1). pp. 35-40. ISSN 2397-3366. doi:10.1038/s41550-018-0658-y.

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The recent detections of gravitational waves (GWs) reported by the LIGO and Virgo collaborations have made a significant impact on physics and astronomy. A global network of GW detectors will play a key role in uncovering the unknown nature of the sources in coordinated observations with astronomical telescopes and detectors. Here we introduce KAGRA, a new GW detector with two 3 km baseline arms arranged in an ‘L’ shape. KAGRA’s design is similar to the second generations of Advanced LIGO and Advanced Virgo, but it will be operating at cryogenic temperatures with sapphire mirrors. This low-temperature feature is advantageous for improving the sensitivity around 100 Hz and is considered to be an important feature for the third-generation GW detector concept (for example, the Einstein Telescope of Europe or the Cosmic Explorer of the United States). Hence, KAGRA is often called a 2.5-generation GW detector based on laser interferometry. KAGRA’s first observation run is scheduled in late 2019, aiming to join the third observation run of the advanced LIGO–Virgo network. When operating along with the existing GW detectors, KAGRA will be helpful in locating GW sources more accurately and determining the source parameters with higher precision, providing information for follow-up observations of GW trigger candidates.

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Additional Information:© 2019 Springer Nature Publishing AG. Received 14 November 2018; Accepted 19 November 2018; Published 08 January 2019. 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 programme of the Institute for Cosmic Ray Research, University of Tokyo, National Research Foundation (NRF) grant of Korea and Computing Infrastructure Project of KISTI-GSDC in Korea, the LIGO project, and the Virgo project. The authors appreciate M. Karouzos for his kind feedback to improve the draft. Author Contributions: C. Kim, Y. Michimura, H. Shinkai and A. Shoda were responsible for writing the first draft of the manuscript and incorporated comments from the collaboration in the course of completing the manuscript. All members of the KAGRA collaboration were responsible for the scope and scientific facts of the manuscript, including data analysis and the resulting figures. The authors declare no competing interests.
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
Institute for Cosmic Ray ResearchUNSPECIFIED
University of TokyoUNSPECIFIED
National Research Foundation of KoreaUNSPECIFIED
Korea Institute of Science and Technology Information (KISTI)UNSPECIFIED
Subject Keywords:Astronomical instrumentation; General relativity and gravity
Issue or Number:1
Record Number:CaltechAUTHORS:20190124-080625865
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92445
Deposited By: Tony Diaz
Deposited On:24 Jan 2019 17:17
Last Modified:16 Nov 2021 03:50

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