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Prospects for improving the sensitivity of KAGRA gravitational wave detector (proceedings)

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Yuta Michimura
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Yuta Michimura
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30 May 2019, 14:50
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30 May 2019, 14:50
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14 Jun 2019, 17:17
01 Jun 2019, 03:02
31 May 2019, 19:44
31 May 2019, 19:02
Proceedings for the KAGRA upgrade talk at 15th Marcel Grossmann Meeting, July 2, 2018.

Yuta Michimura, Masaki Ando, Yutaro Enomoto, Sadakazu Haino, Kazuhiro Hayama, Eiichi Hirose, Yousuke Itoh, Tomoya Kinugawa, Kentro Komori, Matteo Leonardi, Norikatsu Mio, Koji Nagano, Hiroyuki Nakano, Atsushi Nishizawa, Norichika Sago, Masaru Shibata, Hisaaki Shinkai, Kentaro Somiya, Hiroki Takeda, Takahiro Tanaka, Satoshi Tanioka, Li-Wei Wei, Kazuhiro Yamamoto

Upgrades to improve the sensitivity of gravitationa wave detectors are critical for enriching our understandings of the sources and for more precise tests of gravity theories and more precise astronomical observations. Unlike other state-of-the-art detectors such as Advanced LIGO and Advanced Virgo, KAGRA requires different approach for the upgrade since it is the only detector which employs cryogenic cooling of the test mass mirrors. Here, we present possible KAGRA upgrade plans which can be realized by reducing or increasing the input laser power, increasing the mirror mass and injecting frequency dependent squeezed vacuum. We show that each upgrade is effective for different frequency bands and gives different impact on gravitational wave science. We then discuss an effective progression of upgrades based on technical feasibility and science cases.

v1: Preliminary version submitted to CPC
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Referenced by:
  • JGW-P2011740: Prospects for improving the sensitivity of the cryogenic gravitational wave detector KAGRA
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