Commissioning Strategy Meeting (2023/2/17)

• 3 months + 1 week to O4a start (May 24th)
  • Golden Week holidays
• Topics on the sensitivity enhancement
  • Seismic noise isolation of OMC?? (~ 6 months??)
    • where is the noise due to the "normally expected" seismic noise?
    • ..
  • 3 mirrors(IX, IY, EY) cooling(~2 months(assuming "1 month for one mirror" and "one cooling in one arm at the same time".)
    • How much commissioning time will be used for
      • suspension height adjustment
      • drifting
      • PY/L coupling adjustment

      • resonance mitigation control in -> minor adjustment is enough, mainly in gain.

  • Control of PRFPMI+DC
    • ADS/ASC/WFS for arms to mitigate the contrast fluctuation
    • Enhance OMC lock-acquire stability?
    • More dynamic range of PNC-X?
  • Laser
    • HPL usage for IFO (120W to Toyama U, Characterized New 60W to KAGRA)

    • HPL in Toyama U (new 60W characterization -> KAGRA, Repair of 120W from KAGRA)

    • ISS
  • Noise hunting, reduction, budgeting
    • MICH
    • PRCL
    • Suspension control around 100Hz for some suspensions
    • Suspension control around the micro-seismic area
    • PEM/DetChar activities
  • MISC
    • Remove unnecessary stuff from the isolated area, especially around OMC.
• Topics on maintenance for the long operation
  • Vacuum stuff
  • Cryo-coolers
  • Air conditioning Coolers/heaters
  • Seasonal water drainage