• KAGRA
• Commissioning
• DailyWork
• 2018-04-29

2018/4/29(Sun.)

* Remote participants by eZuce: None * 2nd day of Phase 1 operation

• TF of Type A

• Operation wiki page

Report of work (*:responsible person)

• IFO: *Izumi, Enomoto + many
  • OLG was measured in the daytime.
    • Error of TF of actuator is ~20%.
    • 120usec delay exists in the MICH loop.
  • BS oplev sensitivity was improved by increasing whitening gain.
  • Longest lock of the last night was ~8hour.
    • Baffle PD signal is used to BS alignment.
• 40Hz periodic noise was seen every 16min. It is air compressor.
  • It can be stopped during operation.
  • Timing to IY0 will be connected today.
• WAB: Akutsu
  • Heater was turned off ~10am.
• IYC: Tomaru
  • Cooler was turned off at 4pm and the vacuum level got worse to 1e-3Pa order.

Work plan (*:responsible person)

• TF of Type A
  • Some of DOF of ETMY to L.

Laser hazard

• [AM]
  • IR: Upstream SR2-3 line, Xend 1F, Yend 1F
  • Green: PR2, Xend 1F
• [PM]
  • IR: Upstream SR2-3 line, Xend 1F, Yend 1F
  • Green: PR2, Xend 1F
• [night]
  • IR: Upstream SR2-3 line, Xend 1F, Yend 1F
  • Green: PR2, Xend 1F

Weekly

• week of 4/30
  • Operation continues.

Issues