• KAGRA
• Commissioning
• Weekly
• 20181030
• Minute

Minute of KAGRA commissioning meeting

• Date: 2018/10/30 11AM~12PM
• Attendance: Miyakawa, Oshino, Yokozawa
  • eZuce: Enomoto, Kokeyama, Aso, Akutsu, Miyoko, Ushiba, Uchiyama, Miyoki, Aso

Schedule

• 11/5-end of Nov.: IYA root will be closed.
• 11/6: AM or PM for 30min : Inspection for ETMX cleaning
• 12/10 or 11: ETMX cleaning
• MZ work needs stopping IR in the daytime; ~10/31 ok, 11/1~11/31?
• Assignment of tuning for suspensions.

• X arm lock
  • OLTF was measured. Results of cavity pole and finesse are quite coincident with measumrements of mirrors.
• ETMX
  • Bottom one is what we suspect that the magnet might be broken.
  • Spacer can be seen.
  • Magnet size is 2mm in diameter and 2mm in length, so it is difficult to think something hit the magnet and broken. It might be caused drastic temperature change.
• Laser, PSL, IOO report
  • AOM driver was replaced and now AOM is working well. So, it won't change schedule.
• OMC installation
  • They saw some resonance. Needs to fix some circuit for DCPD.
• DGS
  • Scheduling for maintenance time on Wednesday morning. All suspensions go to the safe mode.
  • Picomotor driver seemed to be fixed. Needs final check with what had no response at all before.

Others

• Next meeting: 11/6.