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Improving probability of detecting gravitational waves with high-resolution signals for gravitational wave astronomy

Research Project

Project/Area Number 18K03670
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionThe University of Tokyo

Principal Investigator

Miyakawa Osamu  東京大学, 宇宙線研究所, 准教授 (90532680)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords重力波 / 重力波検出実験 / 干渉計 / 精密測定 / フィードバック制御 / 制御 / 重力波天文学 / 微小計測 / リアルタイム制御
Outline of Final Research Achievements

The current KAGRA may drop very large gravitational waves, for example, due to the lack of dynamic range caused by the limited signal resolution. To solve these problems, we obtained a new 20 bit digital analog converter for high resolution signal output. We have also developed and implemented the associated circuit design, fabrication, and software, and confirmed that it works on the test bench. Due to schedule constraints, we were not able to implement it in the actual actuators on KAGRA, but we will continue to try to introduce it in the future.

Academic Significance and Societal Importance of the Research Achievements

重力波検出器のダイナミックレンジを改善することは、観測時の安定率の向上につながる。今回の20ビットデジタルアナログコンバーターの動作確認により、将来のKAGRAの重力波観測の稼働率の向上に貢献できると考えられる。実際に、過去の観測ではデータのクオリティーが悪いため、解析が困難だったケースが確認されている。稼働率の向上は重力波の検出率の向上だけでなく、データのクオリティー自身を上げより信頼のあるデータを取得することを可能とする。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (7 results)

All 2020 Other

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (2 results) Remarks (3 results)

  • [Journal Article] Compact integrated optical sensors and electromagnetic actuators for vibration isolation systems in the gravitational-wave detector KAGRA2020

    • Author(s)
      Tomotada Akutsu et al.
    • Journal Title

      Review of Scientific Instruments

      Volume: 91 Issue: 11 Pages: 115001-115001

    • DOI

      10.1063/5.0022242

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An arm length stabilization system for KAGRA and future gravitational-wave detectors2020

    • Author(s)
      Akutsu T, et al. (KAGRA Collaboration)
    • Journal Title

      Classical and Quantum Gravity

      Volume: 37 Issue: 3 Pages: 035004-035004

    • DOI

      10.1088/1361-6382/ab5c95

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] KAGRAの制御とデータ取得システム2020

    • Author(s)
      宮川治, 山本尚弘, 押野翔一, KAGRA collaboration
    • Organizer
      日本物理学会 第75回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] KAGRAの制御とデータ取得システム2020

    • Author(s)
      宮川 治
    • Organizer
      日本物理学会 第75回年次大会
    • Related Report
      2019 Research-status Report
  • [Remarks] KAGRA 大型低温重力波望遠鏡

    • URL

      https://gwcenter.icrr.u-tokyo.ac.jp

    • Related Report
      2020 Annual Research Report
  • [Remarks] KAGRA wiki

    • URL

      http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA

    • Related Report
      2020 Annual Research Report
  • [Remarks] KAGRA Digital System Subgroup

    • URL

      http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/DGS

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

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