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Reduction of quantum noise for gravitational wave detector LCGT

Research Project

Project/Area Number 23340077
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionThe University of Tokyo

Principal Investigator

KAWAMURA Seiji  東京大学, 宇宙線研究所, 教授 (40301725)

Co-Investigator(Renkei-kenkyūsha) AGATSUMA Kazuhiro  国立天文台, 重力波プロジェクト推進室, 研究員 (60599489)
SAKATA Shihori  電気通信大学, 情報理工学(系)研究科, 助教 (40534590)
Research Collaborator KONISHO Shiori  
NISHIMURA Tsubasa  
NAKANO Masayuki  
FRIEDRICH Daniel  
MORI Takumi  
Project Period (FY) 2011-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥19,370,000 (Direct Cost: ¥14,900,000、Indirect Cost: ¥4,470,000)
Fiscal Year 2013: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2012: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2011: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Keywords重力波 / レーザー干渉計 / 量子雑音
Outline of Final Research Achievements

An experiment was performed to observe and reduce radiation pressure noise using a high finesse optical cavity consisting of super-light and regular mirrors. The angular anti-spring effect of radiation pressure, which is a serious problem in this experiment, was investigated. Detailed model was established, the new vibration isolation system was installed, and a new method of measuring the transfer function from the torque of the regular mirror to the angle of the super-light mirror was performed. A new laser power measurement system using radiation pressure was also developed.

Report

(4 results)
  • 2014 Final Research Report ( PDF )
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • 2011 Annual Research Report
  • Research Products

    (13 results)

All 2014 2013 2012 2011

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (10 results)

  • [Journal Article] Precise measurement of laser power using an optomechanical system2014

    • Author(s)
      Kazuhiro Agatsuma, Daniel Friedrich, Stefan Ballmer, Giulia DeSalvo, Shihori Sakata, Erina Nishida, and Seiji Kawamura
    • Journal Title

      Optics Express

      Volume: 22 Pages: 2013-2030

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] High accuracy measurement of the quantum efficiency using radiation pressure2012

    • Author(s)
      Kazuhiro Agatsuma
    • Journal Title

      J. Phys.: Conf. Ser.

      Volume: 363 Pages: 12002-12002

    • DOI

      10.1088/1742-6596/363/1/012002

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of a high power optical cavity for optomechanical QND experiment2012

    • Author(s)
      T Mori
    • Journal Title

      J. Phys.: Conf. Ser.

      Volume: 363 Pages: 12015-12015

    • DOI

      10.1088/1742-6596/363/1/012015

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Presentation] Observation and reduction of radiation pressure noise2014

    • Author(s)
      Shiori Konisho
    • Organizer
      Gravitational Wave Advanced Detector Workshop
    • Place of Presentation
      ひだホテルプラザ(岐阜県高山市)
    • Year and Date
      2014-05-25 – 2014-05-30
    • Related Report
      2013 Annual Research Report
  • [Presentation] レーザー干渉計重力波検出器における量子非破壊計測の研究XV2013

    • Author(s)
      阪田紫帆里
    • Organizer
      日本物理学会
    • Place of Presentation
      高知大学(高知県高知市)
    • Year and Date
      2013-09-20 – 2013-09-23
    • Related Report
      2013 Annual Research Report
  • [Presentation] Control of the angular motion of the tiny 20mg suspended mirror in the high power cavity for QRPN measurement2013

    • Author(s)
      Masayuki Nakano
    • Organizer
      The 10th Amaldi Conference on Gravitational Waves
    • Place of Presentation
      Warsaw (Poland)
    • Year and Date
      2013-07-07 – 2013-07-13
    • Related Report
      2013 Annual Research Report
  • [Presentation] レーザー干渉計重力波検出器における量子非破壊計測の研究(14)2013

    • Author(s)
      中野雅之
    • Organizer
      日本物理学会
    • Place of Presentation
      広島大学
    • Related Report
      2012 Annual Research Report
  • [Presentation] Quantum Radiation Pressure Experiment with a Suspended 20mg Mirror2012

    • Author(s)
      Daniel Friedrich
    • Organizer
      Gravitational-Wave Advanced Detector Workshop
    • Place of Presentation
      Waikoloa, USA
    • Related Report
      2012 Annual Research Report
  • [Presentation] Accurate measurement of quantum efficiency2012

    • Author(s)
      Kazuhiro Agatsuma
    • Organizer
      Gravitational-Wave Advanced Detector Workshop
    • Place of Presentation
      Waikoloa, USA
    • Related Report
      2012 Annual Research Report
  • [Presentation] 輻射圧を利用した量子効率の精密測定(2)2012

    • Author(s)
      我妻一博
    • Organizer
      日本物理学会
    • Place of Presentation
      関西学院大学
    • Related Report
      2011 Annual Research Report
  • [Presentation] 極小鏡を用いた輻射圧による鏡の多自由度振動制御2011

    • Author(s)
      森匠
    • Organizer
      日本物理学会
    • Place of Presentation
      弘前大学
    • Related Report
      2011 Annual Research Report
  • [Presentation] Control of motions of a suspended mirror through radiation pressure in a high-power optical cavity2011

    • Author(s)
      Takumi Mori
    • Organizer
      9th Edoardo Amaldi Conference on Gravitational Waves
    • Place of Presentation
      Cardiff, UK
    • Related Report
      2011 Annual Research Report
  • [Presentation] High accuracy measurement of the quantum efficiency using radiation pressure2011

    • Author(s)
      Kazuhiro Agatsuma
    • Organizer
      9th Edoardo Amaldi Conference on Gravitational Waves
    • Place of Presentation
      Cardiff, UK
    • Related Report
      2011 Annual Research Report

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Published: 2011-04-06   Modified: 2019-07-29  

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