2019/7/31(Wed.)

Schedule

• ~7/31: Trial for DRMI with polarization.
• 7/6~: Trial for mass lock
• ITMX
• ETMX
• ITMY
• ETMY
• Long term:
  • 7/1-8/9: FPMI/DRFPMI commissioning
  • 8/12-10/4: ASC
  • 10/7-11/15: Post Commissioning
  • 11/18-12/13: Noise hunting

Report of work

• Finesse of X arm became low to ~1000.
  • Transmitted light was low.
  • ETMX has frost again.
  • We decided to turn off the cooler.
• ITMY motor was stuck actually. It reached to one direction of the limit of range. It was fixed.
  • More continuous works are planed.
  • Magnet was not off. Needs more investigation.

Work plan

• DGS maintenance for exchanging k1dc0, adding BIO cards to k1ioo1 for ALS control (Yamamoto, Oshino)
  • VIS should go safe mode. (Fabian)
  • DC power source will be exchanged at ALS0 and ALS1 rack. (Kamiizumi)
• AOS: Checking and exchanging laser for oplev, ETMY or PRM.
• Type B: Releasing FR for all suspensions after finishing maintenance or afternoon.