• KAGRA
• Commissioning
• DailyWork
• 2018-02-06

2017/2/6(Tue.)

• Remote participants by eZuce: Takahashi
• Report of work (*:responsible person)
  • Alignment and Vibration Isolation: Izumi, Okutomi
    • BF yaw transfer function showed that it did not move well. It was fount that the position of IP was different from when pumping down started.
    • IP drifted 2mm in the air, and another 2mm when pump down. (Takahashi)
    • ETMY IPs were set back to where they were on 1/13. The transfer function now has the similar shape as before, but the Q of lowest peak is a bit low.
• Work plan (*:responsible person)
  • Alignment and Vibration Isolation: *Izumi
    • We can move moving masses of BF, or IPs of yaw to check TF can be recovered.
    • We will play one more day under vacuum.
  • Type A: *Yokozawa
    • RT model of Type A will be separated into cryopayload and tower.
  • Type B
    • SR assembly continues.
• Laser hazard: PSL. Green might be used late of the afternoon, then the center area and Y end will be the hazard area.
• Weekly
  • Week of 2/5
    • Finding causes of ETMY trouble.
      • Vent might be needed if ETMY is touching somewhere.
      • Cooling also will be delayed for 2weeks or so.
• Issues
  • IP drifted 2mm in the air, and another 2mm when pump down.