Prospects for improving the sensitivity of the cryogenic gravitational wave detector KAGRA

Upgrades to improve the sensitivity of gravitational wave detectors enable more frequent detections and more precise source parameter estimation. Unlike other advanced interferometric detectors such as Advanced LIGO and Advanced Virgo, KAGRA requires a different approach for the upgrade since it is...

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Bibliographic Details
Published in:Physical review. D 2020-07, Vol.102 (2), p.1, Article 022008
Main Authors: Michimura, Yuta, Komori, Kentaro, Enomoto, Yutaro, Nagano, Koji, Nishizawa, Atsushi, Hirose, Eiichi, Leonardi, Matteo, Capocasa, Eleonora, Aritomi, Naoki, Zhao, Yuhang, Flaminio, Raffaele, Ushiba, Takafumi, Yamada, Tomohiro, Wei, Li-Wei, Takeda, Hiroki, Tanioka, Satoshi, Ando, Masaki, Yamamoto, Kazuhiro, Hayama, Kazuhiro, Haino, Sadakazu, Somiya, Kentaro
Format: Article
Language:English
Subjects:
Binary stars
Black holes
Broadband
Cryogenic cooling
Cryogenic engineering
Detectors
General Relativity and Quantum Cosmology
Gravitation
Gravitational waves
Instrumentation and Detectors
Neutron stars
Parameter estimation
Physics
Sensitivity
Sensors
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Summary:Upgrades to improve the sensitivity of gravitational wave detectors enable more frequent detections and more precise source parameter estimation. Unlike other advanced interferometric detectors such as Advanced LIGO and Advanced Virgo, KAGRA requires a different approach for the upgrade since it is the only detector which employs cryogenic cooling of the test masses. In this paper, we describe possible KAGRA upgrades with technologies focusing on different detector bands and compare the impacts on the detection of compact binary coalescences. We show that either fivefold improvement in the 100 M⊙ – 100 M⊙ binary black hole range, a factor of 1.3 improvement in the binary neutron star range, or a factor of 1.7 improvement in the sky localization of binary neutron stars is quite feasible with upgrades that do not require changes in the existing cryogenic or vacuum infrastructure. We also show that twofold broadband sensitivity improvement is possible by applying multiple upgrades to the detector.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.102.022008