Minute of KAGRA commissioning meeting

• Date: 2018/3/20 11AM~12PM
• Attendance: Miyakawa, Aso, Yokozawa, Izumi, Akutsu
  • eZuce: Ushiba, Suzuki, Tomaru, Inoue, Shoda

1. Report of work of the last week and plan of work

• Alignment, ETMY: Izumi
  • Tuning of ETMY is still going on. Currently RMS is ~10urad.
    • ETMY yaw motion is still large.
    • Length, Yaw, Translation (diagonal of L) of BF dampings are not easy.
    • Only Yaw seems to be damped, but combination of them is not going well.
  • Beam will be checked every night, specially after pump down yesterday.
    • IMMT1,2 shifted in pitch by ~200urad, in yaw by ~100urad.
• MIF: Izumi
  • LSC full model has been implemented in k1imc0.
  • CAL model is being tested on k1imc0.
    • Cal line will be produced in CAL model.
    • Invisible calibration line will be implemented in LSC model.
  • k1bs, k1imc will be connected by Dolphin. ETMs are connected to k1imc by RFM.
• CAL: Yamamoto, Yokozawa
  • Started using IMC as training of calibration.
    • Simple calibration will be implemented.
  • X end PD will be removed and Baffle PD will be located instead. Changing PD will be done in the week of 3/26.
    • BURNDY to D-SUB9pin transformer should be implemented.
  • T cam at Y end is now stopped. It will be fixed soon. T cam X end will start in the next week. Both front T cams are woking.
• Cryo:
  • Current temperature is 18K.

2. Schedule of ETMX installtion

• See the schedule at the commissioning top page.

3. Tasks or discussions

• Selection of storing DAQ channel -> DGS, before phase 1

  • Check the total amount.

• Screens at control room -> who, when?

  • Needs laser safety information.

• GW alert: online alert in the control room might be prepared. -> Togoshi

4. Phase2

Others

• Frequency noise can be measured by middle lock. Large intensity noise can be a problem.
• Next meeting: 3/27