• KAGRA
• Subgroups
• DET
• Meeting
• 220822

KAGRA Commissioning status at DET meeting

• Date : 2022/08/22

Overall schedule

• Overall schedule
  • 7/11 - 8/19 Suspension commissioning Type-B
  • 8/22 - 8/26 Closing the center area PRM~PR2
  • 8/29 - 9/5 Closing the center area BS~SRM
  • 9/6 - pumping down
  • 8/5 Acceptance check PRM, PR2, PR3 suspensions
  • 8/19 Acceptance check BS, SR2, SR3, SRM
  • 8/22 Acceptance check mid-size baffules
  • 8/26 Acceptance check interferometer
  • Y/YY Acceptance check IMC~PRM

Progress of commissioning

• X arm commissioning
  • End X IM 81K
  • Investigation of the noise in the new oplev light source
  • Investigation of the ADC noise
• Y arm commissioning
  • Pumping down ongoing
  • Installed the ion pums to IXC and IYC
  • IY duct shield cooling (8/5- Started)
• Beam dump around IFI
  • Many ghost beam
  • beam dumper from reflection beam of the PRM
  • Temperature monitor
• ALS CARM/DARM
  • ALS CARM/DARM lock succeeded
  • Calibration confirmation
  • Transfer function measurement Type-A suspension
  • Noise budget
  • Now the noise level is limited by the ALS after fiber noise cancellation
• Find IR resonance improved
• MICH 3f lock
  • Actuation efficiency measurement
• TCam analysis

  • Find the beam position klog#21839

• OMC alignment
• Discussion of closing center area
  • Oplev pylon
  • Beam duct re-installation
  • New gate valve
  • Closing chambers around BS area

Interesting data

• X arm cavity
  • Both IR and GR
  • Glitch investigation of the ITMX ADC
  • Glitch investigation of the MN oplev light source
• Y arm commissioning
  • Both IR and GR
• Center area commissioning
  • MICH 3f lock
    • Check the lock information
  • ALS CARM/DARM
    • Check the lock information
  • IMC (Input Mode Cleaner)
    • ASC (Alignment Sensing and Control) done
    • Long term stability check
      • Beam power, beam position, oplev monitoring
    • Glitch investigation
    • Temperature dependence
    • Relationship between PSL room
    • With PEM channels
    • (Hammering test?)
  • OMC
    • Invesigation will continue after closing the center area
    • Because the BS is too fluctuate, it became difficult to investigate